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# Changelog
All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
## [7.3.0](https://github.com/webpack-contrib/less-loader/compare/v7.2.1...v7.3.0) (2021-01-21)
### Features
* added the `implementation` option ([84d957c](https://github.com/webpack-contrib/less-loader/commit/84d957cfe4fbd6c97619c647d0dd0917b99408ae))
### [7.2.1](https://github.com/webpack-contrib/less-loader/compare/v7.2.0...v7.2.1) (2020-12-28)
### Bug Fixes
* errors from less ([#401](https://github.com/webpack-contrib/less-loader/issues/401)) ([ce31aca](https://github.com/webpack-contrib/less-loader/commit/ce31aca7aada70a8cc267449954ab38b642cd4ba))
## [7.2.0](https://github.com/webpack-contrib/less-loader/compare/v7.1.0...v7.2.0) (2020-12-23)
### Features
* add less ^4.0 to peerDependencies ([#398](https://github.com/webpack-contrib/less-loader/issues/398)) ([3d1abb7](https://github.com/webpack-contrib/less-loader/commit/3d1abb7be041e44fce59b2109d02eada1451a4e4))
## [7.1.0](https://github.com/webpack-contrib/less-loader/compare/v7.0.2...v7.1.0) (2020-11-11)
### Features
* allow the `additionalData` to be async ([#391](https://github.com/webpack-contrib/less-loader/issues/391)) ([62c6934](https://github.com/webpack-contrib/less-loader/commit/62c6934367eb4dd0d4f3155ed2bb5f3e065aafba))
### [7.0.2](https://github.com/webpack-contrib/less-loader/compare/v7.0.1...v7.0.2) (2020-10-09)
### Chore
* update `schema-utils`
### [7.0.1](https://github.com/webpack-contrib/less-loader/compare/v7.0.0...v7.0.1) (2020-09-03)
### Bug Fixes
* normalize `sources` in source maps ([877d99a](https://github.com/webpack-contrib/less-loader/commit/877d99a380deac92e07c41429a9b0c5f0bba2710))
## [7.0.0](https://github.com/webpack-contrib/less-loader/compare/v6.2.0...v7.0.0) (2020-08-25)
### ⚠ BREAKING CHANGES
* move `less` to `peerDependencies`, the `implementation` option was removed
* `prependData` and `appendData` option were removed in favor the `additionaldata` option
### Features
* added `webpackImporter` option ([#377](https://github.com/webpack-contrib/less-loader/issues/377)) ([12dca5b](https://github.com/webpack-contrib/less-loader/commit/12dca5bb573740472cff8176b7aade184c773ebc))
* added loader context in less plugins ([#378](https://github.com/webpack-contrib/less-loader/issues/378)) ([7b7fc5e](https://github.com/webpack-contrib/less-loader/commit/7b7fc5e841a2c7c587a980648056ed4762014e9d))
* added `additionaldata` option ([#374](https://github.com/webpack-contrib/less-loader/issues/374)) ([2785803](https://github.com/webpack-contrib/less-loader/commit/27858037a2e307fdf437604300f14c8233df4568))
## [6.2.0](https://github.com/webpack-contrib/less-loader/compare/v6.1.3...v6.2.0) (2020-07-03)
### Features
* support condition names from `package.json` ([#369](https://github.com/webpack-contrib/less-loader/issues/369)) ([671395d](https://github.com/webpack-contrib/less-loader/commit/671395d6a82425ba4408d1329d8cbfa07dfd9153))
### [6.1.3](https://github.com/webpack-contrib/less-loader/compare/v6.1.2...v6.1.3) (2020-06-29)
### Bug Fixes
* revert restrictions ([e758837](https://github.com/webpack-contrib/less-loader/commit/e75883706fc3d3bb2b6283a727a405216473362e))
### [6.1.2](https://github.com/webpack-contrib/less-loader/compare/v6.1.1...v6.1.2) (2020-06-22)
### Bug Fixes
* ignore watch for remove URLs ([3946937](https://github.com/webpack-contrib/less-loader/commit/39469376e28cd0e38162f7bdf8935d343830a40e))
* resolution logic ([2c3a23a](https://github.com/webpack-contrib/less-loader/commit/2c3a23a440cbdad1edb8b232864cb0233a266782))
* resolve absolute and root relative imports ([3d01b82](https://github.com/webpack-contrib/less-loader/commit/3d01b82fae335d5d69d6290911e788debc732182))
### [6.1.1](https://github.com/webpack-contrib/less-loader/compare/v6.1.0...v6.1.1) (2020-06-11)
### Bug Fixes
* do not rebuilt unmodified files on windows in watch mode ([6537a3d](https://github.com/webpack-contrib/less-loader/commit/6537a3d66559464af9b9a25f4bdda8691e8d9407))
## [6.1.0](https://github.com/webpack-contrib/less-loader/compare/v6.0.0...v6.1.0) (2020-05-07)
### Features
* new `implementation` option ([#354](https://github.com/webpack-contrib/less-loader/issues/354)) ([d2de80f](https://github.com/webpack-contrib/less-loader/commit/d2de80f9fe6ee11e784260dbda960853ebd2449b))
### Bug Fixes
* respect third-party plugins for `Less` ([#353](https://github.com/webpack-contrib/less-loader/issues/353)) ([d0db4f9](https://github.com/webpack-contrib/less-loader/commit/d0db4f9839c4921440c9a0fdc00fd00bc5a6fbb8))
## [6.0.0](https://github.com/webpack-contrib/less-loader/compare/v5.0.0...v6.0.0) (2020-04-24)
### ⚠ BREAKING CHANGES
* minimum supported Node.js version is `10.13`,
* minimum support webpack version is `4`
* `2` version of `less` is not supported anymore
* using `3` versin of `less` by default, so you don't need to have `less` in your `package.json`, we already supply it
* move less-specific options to the `lessOptions` option, please look at [README](https://github.com/webpack-contrib/less-loader#lessoptions)
### Features
* the `paths` options now works with webpack resolver ([3931470](https://github.com/webpack-contrib/less-loader/commit/393147064672ace986ec84aca21f69f0ab819a9c))
* allow a function to be used for `lessOptions` ([#325](https://github.com/webpack-contrib/less-loader/issues/325)) ([a6be94a](https://github.com/webpack-contrib/less-loader/commit/a6be94a6da291a27026415d509249e0203e977ad))
* added the `appendData` option ([#336](https://github.com/webpack-contrib/less-loader/issues/336)) ([fb94605](https://github.com/webpack-contrib/less-loader/commit/fb946051bb4d52a6f9a93fe40a8cd09a56a2c5f1))
* added the `prependData` option ([#327](https://github.com/webpack-contrib/less-loader/issues/327)) ([9df8755](https://github.com/webpack-contrib/less-loader/commit/9df87554ee1ac57d2c32743049174da20e8a8a61))
* support `less` and `style` fields in `package.json`
* support `index.less` file for packages
### Bug Fixes
* support import aliases without tilde ([#335](https://github.com/webpack-contrib/less-loader/issues/335)) ([24021cd](https://github.com/webpack-contrib/less-loader/commit/24021cdb9dc0496fcebd6966516ff66584525cf3))
* do not crash on remotely imports ([#333](https://github.com/webpack-contrib/less-loader/issues/333)) ([8e020e9](https://github.com/webpack-contrib/less-loader/commit/8e020e9cf794d958024cc91ad490b621d5170878))
* add webpack v5 support ([#317](https://github.com/webpack-contrib/less-loader/issues/317)) ([f0b42b4](https://github.com/webpack-contrib/less-loader/commit/f0b42b4e64dceed0bbb2557c0d88d1c36fe3e553))
* first resolve an import using less resolver, then using webpack resolver ([#340](https://github.com/webpack-contrib/less-loader/issues/340)) ([443bd5a](https://github.com/webpack-contrib/less-loader/commit/443bd5ac0539ca93a998326754bcd607aaecdf1a))
* fix a resolution for `@import 'package/file.ess';` and `@import './package/file.ess';`
<a name="5.0.0"></a>
# [5.0.0](https://github.com/webpack-contrib/less-loader/compare/v4.1.0...v5.0.0) (2019-04-29)
### Bug Fixes
* webpack watching does not recover after broken less is fixed ([#289](https://github.com/webpack-contrib/less-loader/issues/289)) ([f41d12e](https://github.com/webpack-contrib/less-loader/commit/f41d12e))
### Chores
* remove old bits mentioning webpack < 4 and node < 6 ([#286](https://github.com/webpack-contrib/less-loader/issues/286)) ([012eb8f](https://github.com/webpack-contrib/less-loader/commit/012eb8f))
### Code Refactoring
* remove deprecated compress option ([#283](https://github.com/webpack-contrib/less-loader/issues/283)) ([3d6e9e9](https://github.com/webpack-contrib/less-loader/commit/3d6e9e9))
### BREAKING CHANGES
* remove deprecated compress option.
* drop support for node < 6.9 and webpack < 4
<a name="4.1.0"></a>
# [4.1.0](https://github.com/webpack-contrib/less-loader/compare/v4.0.6...v4.1.0) (2018-03-09)
### Features
* **package:** support `less >= v3.0.0` ([#242](https://github.com/webpack-contrib/less-loader/issues/242)) ([d8c9d83](https://github.com/webpack-contrib/less-loader/commit/d8c9d83))
<a name="4.0.6"></a>
## [4.0.6](https://github.com/webpack-contrib/less-loader/compare/v4.0.5...v4.0.6) (2018-02-27)
### Bug Fixes
* **package:** add `webpack >= v4.0.0` (`peerDependencies`) ([#245](https://github.com/webpack-contrib/less-loader/issues/245)) ([011cc73](https://github.com/webpack-contrib/less-loader/commit/011cc73))
<a name="4.0.5"></a>
## [4.0.5](https://github.com/webpack-contrib/less-loader/compare/v4.0.4...v4.0.5) (2017-07-10)
### Chore
* support `webpack@3` ([670ab18](https://github.com/webpack-contrib/less-loader/commit/670ab18))
<a name="4.0.4"></a>
## [4.0.4](https://github.com/webpack-contrib/less-loader/compare/v4.0.3...v4.0.4) (2017-05-30)
### Bug Fixes
* resolve `[@import](https://github.com/import)` with absolute paths ([#201](https://github.com/webpack-contrib/less-loader/issues/201)) ([a3f9601](https://github.com/webpack-contrib/less-loader/commit/a3f9601)), closes [webpack-contrib/less-loader#93](https://github.com/webpack-contrib/less-loader/issues/93)
<a name="4.0.3"></a>
## [4.0.3](https://github.com/webpack-contrib/less-loader/compare/v4.0.2...v4.0.3) (2017-03-30)
### Bug Fixes
* sourcesContent missing in source maps ([df28035](https://github.com/webpack-contrib/less-loader/commit/df28035))
<a name="4.0.2"></a>
## [4.0.2](https://github.com/webpack-contrib/less-loader/compare/v4.0.1...v4.0.2) (2017-03-21)
### Bug Fixes
* Plugin.install is not a function ([f8ae245](https://github.com/webpack-contrib/less-loader/commit/f8ae245))
<a name="4.0.1"></a>
## [4.0.1](https://github.com/webpack-contrib/less-loader/compare/v4.0.0...v4.0.1) (2017-03-21)
### Bug Fixes
* wrong entry point in package.json ([918bfe9](https://github.com/webpack-contrib/less-loader/commit/918bfe9)), closes [#161](https://github.com/webpack-contrib/less-loader/issues/161) [#179](https://github.com/webpack-contrib/less-loader/issues/179) [#177](https://github.com/webpack-contrib/less-loader/issues/177)
<a name="4.0.0"></a>
# [4.0.0](https://github.com/webpack-contrib/less-loader/compare/v3.0.0...v4.0.0) (2017-03-20)
### Bug Fixes
* error where not all files were watched ([53c90fc](https://github.com/webpack-contrib/less-loader/commit/53c90fc))
* resolve alias ([98d4e63](https://github.com/webpack-contrib/less-loader/commit/98d4e63))
### Chores
* **dependencies:** Update peer dependencies ([24a6f66](https://github.com/webpack-contrib/less-loader/commit/24a6f66))
### Features
* **source-maps:** refactor source maps handling ([895044f](https://github.com/webpack-contrib/less-loader/commit/895044f))
* allow user to choose between resolvers ([1d6e505](https://github.com/webpack-contrib/less-loader/commit/1d6e505))
* improve formatting of error messages ([39772a5](https://github.com/webpack-contrib/less-loader/commit/39772a5))
* make any file type importable ([d3022b8](https://github.com/webpack-contrib/less-loader/commit/d3022b8))
* remove root option ([39ad4f8](https://github.com/webpack-contrib/less-loader/commit/39ad4f8))
### BREAKING CHANGES
* If you've already configured your `resolve.alias` with a `.less` extension, you can now remove that wrong extension.
* The root option was never documented, so it's very unlikely that this is actually a breaking change. However, since the option was removed, we need to flag this as breaking.
* **dependencies:** Require webpack 2 as peer dependency
* **source-maps:** Since the map is now passed as an object to the next loader, this could potentially break if another loader than the css-loader is used. The css-loader accepts both.
Changelog
---------
### 3.0.0
- **Breaking**: Remove node 0.10 and 0.12 support
- **Breaking**: Remove official webpack 1 support. There are no breaking changes for webpack 1 with `3.0.0`, but future release won't be tested against webpack 1
- **Breaking**: Remove synchronous compilation support [#152](https://github.com/webpack-contrib/less-loader/pull/152) [#84](https://github.com/webpack-contrib/less-loader/issues/84)
- Reduce npm package size by using the [files](https://docs.npmjs.com/files/package.json#files) property in the `package.json`
### 2.2.3
- Fix missing path information in source map [#73](https://github.com/webpack/less-loader/pull/73)
- Add deprecation warning [#84](https://github.com/webpack/less-loader/issues/84)
### 2.2.2
- Fix issues with synchronous less functions like `data-uri()`, `image-size()`, `image-width()`, `image-height()` [#31](https://github.com/webpack/less-loader/issues/31) [#38](https://github.com/webpack/less-loader/issues/38) [#43](https://github.com/webpack/less-loader/issues/43) [#58](https://github.com/webpack/less-loader/pull/58)
### 2.2.1
- Improve Readme
### 2.2.0
- Added option to specify LESS plugins [#40](https://github.com/webpack/less-loader/pull/40)

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Copyright JS Foundation and other contributors
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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<div align="center">
<a href="https://github.com/webpack/webpack">
<img width="200" height="200" src="https://webpack.js.org/assets/icon-square-big.svg">
</a>
</div>
[![npm][npm]][npm-url]
[![node][node]][node-url]
[![deps][deps]][deps-url]
[![tests][tests]][tests-url]
[![cover][cover]][cover-url]
[![chat][chat]][chat-url]
[![size][size]][size-url]
# less-loader
A Less loader for webpack. Compiles Less to CSS.
## Getting Started
To begin, you'll need to install `less` and `less-loader`:
```console
$ npm install less less-loader --save-dev
```
Then add the loader to your `webpack` config. For example:
**webpack.config.js**
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
loader: "less-loader", // compiles Less to CSS
},
],
},
};
```
And run `webpack` via your preferred method.
## Options
| Name | Type | Default | Description |
| :---------------------------------------: | :------------------: | :----------------------: | :----------------------------------------------------- |
| **[`lessOptions`](#lessoptions)** | `{Object\|Function}` | `{ relativeUrls: true }` | Options for Less. |
| **[`additionalData`](#additionalData)** | `{String\|Function}` | `undefined` | Prepends/Appends `Less` code to the actual entry file. |
| **[`sourceMap`](#sourcemap)** | `{Boolean}` | `compiler.devtool` | Enables/Disables generation of source maps. |
| **[`webpackImporter`](#webpackimporter)** | `{Boolean}` | `true` | Enables/Disables the default Webpack importer. |
| **[`implementation`](#implementation)** | `{Object}` | `less` | Setup Less implementation to use. |
### `lessOptions`
Type: `Object|Function`
Default: `{ relativeUrls: true }`
You can pass any Less specific options to the `less-loader` through the `lessOptions` property in the [loader options](https://webpack.js.org/configuration/module/#rule-options-rule-query). See the [Less documentation](http://lesscss.org/usage/#command-line-usage-options) for all available options in dash-case. Since we're passing these options to Less programmatically, you need to pass them in camelCase here:
#### `Object`
Use an object to pass options through to Less.
**webpack.config.js**
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
use: [
{
loader: "style-loader",
},
{
loader: "css-loader",
},
{
loader: "less-loader",
options: {
lessOptions: {
strictMath: true,
},
},
},
],
},
],
},
};
```
#### `Function`
Allows setting the options passed through to Less based off of the loader context.
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
use: [
"style-loader",
"css-loader",
{
loader: "less-loader",
options: {
lessOptions: (loaderContext) => {
// More information about available properties https://webpack.js.org/api/loaders/
const { resourcePath, rootContext } = loaderContext;
const relativePath = path.relative(rootContext, resourcePath);
if (relativePath === "styles/foo.less") {
return {
paths: ["absolute/path/c", "absolute/path/d"],
};
}
return {
paths: ["absolute/path/a", "absolute/path/b"],
};
},
},
},
],
},
],
},
};
```
### `additionalData`
Type: `String|Function`
Default: `undefined`
Prepends `Less` code before the actual entry file.
In this case, the `less-loader` will not override the source but just **prepend** the entry's content.
This is especially useful when some of your Less variables depend on the environment:
> ℹ Since you're injecting code, this will break the source mappings in your entry file. Often there's a simpler solution than this, like multiple Less entry files.
#### `String`
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
use: [
"style-loader",
"css-loader",
{
loader: "less-loader",
options: {
additionalData: `@env: ${process.env.NODE_ENV};`,
},
},
],
},
],
},
};
```
#### `Function`
##### Sync
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
use: [
"style-loader",
"css-loader",
{
loader: "less-loader",
options: {
additionalData: (content, loaderContext) => {
// More information about available properties https://webpack.js.org/api/loaders/
const { resourcePath, rootContext } = loaderContext;
const relativePath = path.relative(rootContext, resourcePath);
if (relativePath === "styles/foo.less") {
return "@value: 100px;" + content;
}
return "@value: 200px;" + content;
},
},
},
],
},
],
},
};
```
##### Async
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
use: [
"style-loader",
"css-loader",
{
loader: "less-loader",
options: {
additionalData: async (content, loaderContext) => {
// More information about available properties https://webpack.js.org/api/loaders/
const { resourcePath, rootContext } = loaderContext;
const relativePath = path.relative(rootContext, resourcePath);
if (relativePath === "styles/foo.less") {
return "@value: 100px;" + content;
}
return "@value: 200px;" + content;
},
},
},
],
},
],
},
};
```
### `sourceMap`
Type: `Boolean`
Default: depends on the `compiler.devtool` value
By default generation of source maps depends on the [`devtool`](https://webpack.js.org/configuration/devtool/) option. All values enable source map generation except `eval` and `false` value.
**webpack.config.js**
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
use: [
"style-loader",
{
loader: "css-loader",
options: {
sourceMap: true,
},
},
{
loader: "less-loader",
options: {
sourceMap: true,
},
},
],
},
],
},
};
```
### `webpackImporter`
Type: `Boolean`
Default: `true`
Enables/Disables the default Webpack importer.
This can improve performance in some cases. Use it with caution because aliases and `@import` at-rules starting with `~` will not work.
**webpack.config.js**
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
use: [
"style-loader",
"css-loader",
{
loader: "less-loader",
options: {
webpackImporter: false,
},
},
],
},
],
},
};
```
### `implementation`
Type: `Object`
> ⚠ less-loader compatible with Less 3 and 4 versions
The special `implementation` option determines which implementation of Less to use. Overrides the locally installed `peerDependency` version of `less`.
**This option is only really useful for downstream tooling authors to ease the Less 3-to-4 transition.**
**webpack.config.js**
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
use: [
"style-loader",
"css-loader",
{
loader: "less-loader",
options: {
implementation: require("less"),
},
},
],
},
],
},
};
```
## Examples
### Normal usage
Chain the `less-loader` with the [`css-loader`](https://github.com/webpack-contrib/css-loader) and the [`style-loader`](https://github.com/webpack-contrib/style-loader) to immediately apply all styles to the DOM.
**webpack.config.js**
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
use: [
{
loader: "style-loader", // creates style nodes from JS strings
},
{
loader: "css-loader", // translates CSS into CommonJS
},
{
loader: "less-loader", // compiles Less to CSS
},
],
},
],
},
};
```
Unfortunately, Less doesn't map all options 1-by-1 to camelCase. When in doubt, [check their executable](https://github.com/less/less.js/blob/3.x/bin/lessc) and search for the dash-case option.
### Source maps
To enable sourcemaps for CSS, you'll need to pass the `sourceMap` property in the loader's options. If this is not passed, the loader will respect the setting for webpack source maps, set in `devtool`.
**webpack.config.js**
```javascript
module.exports = {
devtool: "source-map", // any "source-map"-like devtool is possible
module: {
rules: [
{
test: /\.less$/i,
use: [
"style-loader",
{
loader: "css-loader",
options: {
sourceMap: true,
},
},
{
loader: "less-loader",
options: {
sourceMap: true,
},
},
],
},
],
},
};
```
If you want to edit the original Less files inside Chrome, [there's a good blog post](https://medium.com/@toolmantim/getting-started-with-css-sourcemaps-and-in-browser-sass-editing-b4daab987fb0). The blog post is about Sass but it also works for Less.
### In production
Usually, it's recommended to extract the style sheets into a dedicated file in production using the [MiniCssExtractPlugin](https://github.com/webpack-contrib/mini-css-extract-plugin). This way your styles are not dependent on JavaScript.
### Imports
Starting with `less-loader` 4, you can now choose between Less' builtin resolver and webpack's resolver. By default, webpack's resolver is used.
#### webpack resolver
webpack provides an [advanced mechanism to resolve files](https://webpack.js.org/configuration/resolve/). The `less-loader` applies a Less plugin that passes all queries to the webpack resolver. Thus you can import your Less modules from `node_modules`. Just prepend them with a `~` which tells webpack to look up the [`modules`](https://webpack.js.org/configuration/resolve/#resolve-modules).
```css
@import "~bootstrap/less/bootstrap";
```
It's important to only prepend it with `~`, because `~/` resolves to the home-directory. webpack needs to distinguish between `bootstrap` and `~bootstrap`, because CSS and Less files have no special syntax for importing relative files. Writing `@import "file"` is the same as `@import "./file";`
#### Less resolver
If you specify the `paths` option, modules will be searched in the given `paths`. This is Less' default behavior. `paths` should be an array with absolute paths:
**webpack.config.js**
```js
module.exports = {
module: {
rules: [
{
test: /\.less$/i,
use: [
{
loader: "style-loader",
},
{
loader: "css-loader",
},
{
loader: "less-loader",
options: {
lessOptions: {
paths: [path.resolve(__dirname, "node_modules")],
},
},
},
],
},
],
},
};
```
### Plugins
In order to use [plugins](http://lesscss.org/usage/#plugins), simply set the `plugins` option like this:
```js
// webpack.config.js
const CleanCSSPlugin = require('less-plugin-clean-css');
module.exports = {
...
{
loader: 'less-loader',
options: {
lessOptions: {
plugins: [
new CleanCSSPlugin({ advanced: true }),
],
},
},
},
...
};
```
> ℹ️ Access to the [loader context](https://webpack.js.org/api/loaders/#the-loader-context) inside the custom plugin can be done using the `less.webpackLoaderContext` property.
```js
module.exports = {
install: function (less, pluginManager, functions) {
functions.add("pi", function () {
// Loader context is available in `less.webpackLoaderContext`
return Math.PI;
});
},
};
```
### Extracting style sheets
Bundling CSS with webpack has some nice advantages like referencing images and fonts with hashed urls or [hot module replacement](https://webpack.js.org/concepts/hot-module-replacement/) in development. In production, on the other hand, it's not a good idea to apply your style sheets depending on JS execution. Rendering may be delayed or even a [FOUC](https://en.wikipedia.org/wiki/Flash_of_unstyled_content) might be visible. Thus it's often still better to have them as separate files in your final production build.
There are two possibilities to extract a style sheet from the bundle:
- [`extract-loader`](https://github.com/peerigon/extract-loader) (simpler, but specialized on the css-loader's output)
- [MiniCssExtractPlugin](https://github.com/webpack-contrib/mini-css-extract-plugin) (more complex, but works in all use-cases)
### CSS modules gotcha
There is a known problem with Less and [CSS modules](https://github.com/css-modules/css-modules) regarding relative file paths in `url(...)` statements. [See this issue for an explanation](https://github.com/webpack-contrib/less-loader/issues/109#issuecomment-253797335).
## Contributing
Please take a moment to read our contributing guidelines if you haven't yet done so.
[CONTRIBUTING](./.github/CONTRIBUTING.md)
## License
[MIT](./LICENSE)
[npm]: https://img.shields.io/npm/v/less-loader.svg
[npm-url]: https://npmjs.com/package/less-loader
[node]: https://img.shields.io/node/v/less-loader.svg
[node-url]: https://nodejs.org
[deps]: https://david-dm.org/webpack-contrib/less-loader.svg
[deps-url]: https://david-dm.org/webpack-contrib/less-loader
[tests]: https://github.com/webpack-contrib/less-loader/workflows/less-loader/badge.svg
[tests-url]: https://github.com/webpack-contrib/less-loader/actions
[cover]: https://codecov.io/gh/webpack-contrib/less-loader/branch/master/graph/badge.svg
[cover-url]: https://codecov.io/gh/webpack-contrib/less-loader
[chat]: https://img.shields.io/badge/gitter-webpack%2Fwebpack-brightgreen.svg
[chat-url]: https://gitter.im/webpack/webpack
[size]: https://packagephobia.now.sh/badge?p=less-loader
[size-url]: https://packagephobia.now.sh/result?p=less-loader

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _path = _interopRequireDefault(require("path"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
class LessError extends Error {
constructor(error) {
super();
this.message = ["\n", ...LessError.getFileExcerptIfPossible(error), error.message.charAt(0).toUpperCase() + error.message.slice(1), error.filename ? ` Error in ${_path.default.normalize(error.filename)} (line ${error.line}, column ${error.column})` : ""].join("\n");
this.hideStack = true;
}
static getFileExcerptIfPossible(lessError) {
if (typeof lessError.extract === "undefined") {
return [];
}
const excerpt = lessError.extract.slice(0, 2);
const column = Math.max(lessError.column - 1, 0);
if (typeof excerpt[0] === "undefined") {
excerpt.shift();
}
excerpt.push(`${new Array(column).join(" ")}^`);
return excerpt;
}
}
var _default = LessError;
exports.default = _default;

3
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"use strict";
module.exports = require("./index").default;

84
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _path = _interopRequireDefault(require("path"));
var _less = _interopRequireDefault(require("less"));
var _loaderUtils = require("loader-utils");
var _schemaUtils = require("schema-utils");
var _options = _interopRequireDefault(require("./options.json"));
var _utils = require("./utils");
var _LessError = _interopRequireDefault(require("./LessError"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
async function lessLoader(source) {
const options = (0, _loaderUtils.getOptions)(this);
(0, _schemaUtils.validate)(_options.default, options, {
name: "Less Loader",
baseDataPath: "options"
});
const callback = this.async();
const lessOptions = (0, _utils.getLessOptions)(this, options);
const useSourceMap = typeof options.sourceMap === "boolean" ? options.sourceMap : this.sourceMap;
if (useSourceMap) {
lessOptions.sourceMap = {
outputSourceFiles: true
};
}
let data = source;
if (typeof options.additionalData !== "undefined") {
data = typeof options.additionalData === "function" ? `${await options.additionalData(data, this)}` : `${options.additionalData}\n${data}`;
}
let result;
try {
result = await (options.implementation || _less.default).render(data, lessOptions);
} catch (error) {
if (error.filename) {
// `less` returns forward slashes on windows when `webpack` resolver return an absolute windows path in `WebpackFileManager`
// Ref: https://github.com/webpack-contrib/less-loader/issues/357
this.addDependency(_path.default.normalize(error.filename));
}
callback(new _LessError.default(error));
return;
}
const {
css,
imports
} = result;
imports.forEach(item => {
if ((0, _utils.isUnsupportedUrl)(item)) {
return;
} // `less` return forward slashes on windows when `webpack` resolver return an absolute windows path in `WebpackFileManager`
// Ref: https://github.com/webpack-contrib/less-loader/issues/357
this.addDependency(_path.default.normalize(item));
});
let map = typeof result.map === "string" ? JSON.parse(result.map) : result.map;
if (map && useSourceMap) {
map = (0, _utils.normalizeSourceMap)(map, this.rootContext);
}
callback(null, css, map);
}
var _default = lessLoader;
exports.default = _default;

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{
"type": "object",
"properties": {
"lessOptions": {
"description": "Options to pass through to `Less` (https://github.com/webpack-contrib/less-loader#lessoptions).",
"anyOf": [
{
"type": "object",
"additionalProperties": true
},
{
"instanceof": "Function"
}
]
},
"additionalData": {
"description": "Prepends/Appends `Less` code to the actual entry file (https://github.com/webpack-contrib/less-loader#additionalData).",
"anyOf": [
{
"type": "string"
},
{
"instanceof": "Function"
}
]
},
"sourceMap": {
"description": "Enables/Disables generation of source maps (https://github.com/webpack-contrib/less-loader#sourcemap).",
"type": "boolean"
},
"webpackImporter": {
"description": "Enables/Disables default `webpack` importer (https://github.com/webpack-contrib/less-loader#webpackimporter).",
"type": "boolean"
},
"implementation": {
"description": "The implementation of the `Less` to be used (https://github.com/webpack-contrib/less-loader#implementation).",
"type": "object"
}
},
"additionalProperties": false
}

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.getLessOptions = getLessOptions;
exports.isUnsupportedUrl = isUnsupportedUrl;
exports.normalizeSourceMap = normalizeSourceMap;
var _path = _interopRequireDefault(require("path"));
var _less = _interopRequireDefault(require("less"));
var _full = require("klona/full");
var _loaderUtils = require("loader-utils");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
/* eslint-disable class-methods-use-this */
const trailingSlash = /[/\\]$/; // This somewhat changed in Less 3.x. Now the file name comes without the
// automatically added extension whereas the extension is passed in as `options.ext`.
// So, if the file name matches this regexp, we simply ignore the proposed extension.
const IS_SPECIAL_MODULE_IMPORT = /^~[^/]+$/; // `[drive_letter]:\` + `\\[server]\[sharename]\`
const IS_NATIVE_WIN32_PATH = /^[a-z]:[/\\]|^\\\\/i;
/**
* Creates a Less plugin that uses webpack's resolving engine that is provided by the loaderContext.
*
* @param {LoaderContext} loaderContext
* @returns {LessPlugin}
*/
function createWebpackLessPlugin(loaderContext) {
const resolve = loaderContext.getResolve({
conditionNames: ["less", "style"],
mainFields: ["less", "style", "main", "..."],
mainFiles: ["index", "..."],
extensions: [".less", ".css"]
});
class WebpackFileManager extends _less.default.FileManager {
supports(filename) {
if (filename[0] === "/" || IS_NATIVE_WIN32_PATH.test(filename)) {
return true;
}
if (this.isPathAbsolute(filename)) {
return false;
}
return true;
} // Sync resolving is used at least by the `data-uri` function.
// This file manager doesn't know how to do it, so let's delegate it
// to the default file manager of Less.
// We could probably use loaderContext.resolveSync, but it's deprecated,
// see https://webpack.js.org/api/loaders/#this-resolvesync
supportsSync() {
return false;
}
async resolveFilename(filename, currentDirectory) {
// Less is giving us trailing slashes, but the context should have no trailing slash
const context = currentDirectory.replace(trailingSlash, "");
const request = (0, _loaderUtils.urlToRequest)(filename, // eslint-disable-next-line no-undefined
filename.charAt(0) === "/" ? loaderContext.rootContext : undefined);
return this.resolveRequests(context, [...new Set([request, filename])]);
}
resolveRequests(context, possibleRequests) {
if (possibleRequests.length === 0) {
return Promise.reject();
}
return resolve(context, possibleRequests[0]).then(result => result).catch(error => {
const [, ...tailPossibleRequests] = possibleRequests;
if (tailPossibleRequests.length === 0) {
throw error;
}
return this.resolveRequests(context, tailPossibleRequests);
});
}
async loadFile(filename, ...args) {
let result;
try {
if (IS_SPECIAL_MODULE_IMPORT.test(filename)) {
const error = new Error();
error.type = "Next";
throw error;
}
result = await super.loadFile(filename, ...args);
} catch (error) {
if (error.type !== "File" && error.type !== "Next") {
return Promise.reject(error);
}
try {
result = await this.resolveFilename(filename, ...args);
} catch (webpackResolveError) {
error.message = `Less resolver error:\n${error.message}\n\n` + `Webpack resolver error details:\n${webpackResolveError.details}\n\n` + `Webpack resolver error missing:\n${webpackResolveError.missing}\n\n`;
return Promise.reject(error);
}
loaderContext.addDependency(result);
return super.loadFile(result, ...args);
}
loaderContext.addDependency(_path.default.normalize(result.filename));
return result;
}
}
return {
install(lessInstance, pluginManager) {
pluginManager.addFileManager(new WebpackFileManager());
},
minVersion: [3, 0, 0]
};
}
/**
* Get the less options from the loader context and normalizes its values
*
* @param {object} loaderContext
* @param {object} loaderOptions
* @returns {Object}
*/
function getLessOptions(loaderContext, loaderOptions) {
const options = (0, _full.klona)(typeof loaderOptions.lessOptions === "function" ? loaderOptions.lessOptions(loaderContext) || {} : loaderOptions.lessOptions || {});
const lessOptions = {
plugins: [],
relativeUrls: true,
// We need to set the filename because otherwise our WebpackFileManager will receive an undefined path for the entry
filename: loaderContext.resourcePath,
...options
};
const shouldUseWebpackImporter = typeof loaderOptions.webpackImporter === "boolean" ? loaderOptions.webpackImporter : true;
if (shouldUseWebpackImporter) {
lessOptions.plugins.unshift(createWebpackLessPlugin(loaderContext));
}
lessOptions.plugins.unshift({
install(lessProcessor) {
// eslint-disable-next-line no-param-reassign
lessProcessor.webpackLoaderContext = loaderContext;
}
});
return lessOptions;
}
function isUnsupportedUrl(url) {
// Is Windows path
if (IS_NATIVE_WIN32_PATH.test(url)) {
return false;
} // Scheme: https://tools.ietf.org/html/rfc3986#section-3.1
// Absolute URL: https://tools.ietf.org/html/rfc3986#section-4.3
return /^[a-zA-Z][a-zA-Z\d+\-.]*:/.test(url);
}
function normalizeSourceMap(map) {
const newMap = map; // map.file is an optional property that provides the output filename.
// Since we don't know the final filename in the webpack build chain yet, it makes no sense to have it.
// eslint-disable-next-line no-param-reassign
delete newMap.file; // eslint-disable-next-line no-param-reassign
newMap.sourceRoot = ""; // `less` returns POSIX paths, that's why we need to transform them back to native paths.
// eslint-disable-next-line no-param-reassign
newMap.sources = newMap.sources.map(source => _path.default.normalize(source));
return newMap;
}

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# Changelog
All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
## [3.3.0](https://github.com/webpack/schema-utils/compare/v3.2.0...v3.3.0) (2023-06-14)
### Features
* added API to disable and enable validation ([#183](https://github.com/webpack/schema-utils/issues/183)) ([d4d334f](https://github.com/webpack/schema-utils/commit/d4d334f0ba22eb6b6564b1119e8f3ea439e1f2bb))
### Bug Fixes
* **perf:** cache compiled schema ([#182](https://github.com/webpack/schema-utils/issues/182)) ([02aa068](https://github.com/webpack/schema-utils/commit/02aa068df80d99cc576a5ed385f947eb5204c5db))
## [3.2.0](https://github.com/webpack/schema-utils/compare/v3.1.2...v3.2.0) (2023-06-07)
### Features
* implement `undefinedAsNull` keyword for `enum` type ([#176](https://github.com/webpack/schema-utils/issues/176)) ([95826eb](https://github.com/webpack/schema-utils/commit/95826eb9e14bc4b10ab95f962ac2bdca447880a3))
### [3.1.2](https://github.com/webpack/schema-utils/compare/v3.1.1...v3.1.2) (2023-04-15)
### Bug Fixes
* **perf:** reduced initial start time ([#170](https://github.com/webpack/schema-utils/issues/170)) ([8d052e6](https://github.com/webpack/schema-utils/commit/8d052e6764dc9247e7d5b7b1ae8f87ca5047b2b0))
### [3.1.1](https://github.com/webpack/schema-utils/compare/v3.1.0...v3.1.1) (2021-07-19)
### Bug Fixes
* update error message for `integer` ([#136](https://github.com/webpack/schema-utils/issues/136)) ([2daa97e](https://github.com/webpack/schema-utils/commit/2daa97eae87e6790b92711746a6a527b859ac13b))
## [3.1.0](https://github.com/webpack/schema-utils/compare/v3.0.0...v3.1.0) (2021-06-30)
### Features
* added the `link` property in validation error ([589aa59](https://github.com/webpack/schema-utils/commit/589aa5993424a8bc45ec22b67dff55be92c456a9))
### Bug Fixes
* non-empty validation error message ([#116](https://github.com/webpack/schema-utils/issues/116)) ([c51abef](https://github.com/webpack/schema-utils/commit/c51abefa4d4d62e1346b3a105182d36675595077))
## [3.0.0](https://github.com/webpack/schema-utils/compare/v2.7.1...v3.0.0) (2020-10-05)
### ⚠ BREAKING CHANGES
* minimum supported `Node.js` version is `10.13.0`,
* the packages exports was changed, please use `const { validate } = require('schema-utils');`
* the `ValidateError` export was removed in favor the `ValidationError` export, please use `const { ValidationError } = require('schema-utils');`
### [2.7.1](https://github.com/webpack/schema-utils/compare/v2.7.0...v2.7.1) (2020-08-31)
### Bug Fixes
* remove esModuleInterop from tsconfig ([#110](https://github.com/webpack/schema-utils/issues/110)) ([#111](https://github.com/webpack/schema-utils/issues/111)) ([2f40154](https://github.com/webpack/schema-utils/commit/2f40154b91e45b393258ae9dd8f10cc3b8590b7d))
## [2.7.0](https://github.com/webpack/schema-utils/compare/v2.6.6...v2.7.0) (2020-05-29)
### Features
* improve hints ([a36e535](https://github.com/webpack/schema-utils/commit/a36e535faca1b01e27c3bfa3c8bee9227c3f836c))
* smart not case ([#101](https://github.com/webpack/schema-utils/issues/101)) ([698d8b0](https://github.com/webpack/schema-utils/commit/698d8b05462d86aadb217e25a45c7b953a79a52e))
### Bug Fixes
* move @types/json-schema from devDependencies to dependencies ([#97](https://github.com/webpack/schema-utils/issues/97)) ([#98](https://github.com/webpack/schema-utils/issues/98)) ([945e67d](https://github.com/webpack/schema-utils/commit/945e67db5e19baf7ec7df72813b0739dd56f950d))
### [2.6.6](https://github.com/webpack/schema-utils/compare/v2.6.5...v2.6.6) (2020-04-17)
### Bug Fixes
* improve perf
### [2.6.5](https://github.com/webpack/schema-utils/compare/v2.6.4...v2.6.5) (2020-03-11)
### Bug Fixes
* correct dots at end of sentence ([7284beb](https://github.com/webpack/schema-utils/commit/7284bebe00cd570f1bef2c15951a07b9794038e6))
### [2.6.4](https://github.com/webpack/schema-utils/compare/v2.6.3...v2.6.4) (2020-01-17)
### Bug Fixes
* change `initialised` to `initialized` ([#87](https://github.com/webpack/schema-utils/issues/87)) ([70f12d3](https://github.com/webpack/schema-utils/commit/70f12d33a8eaa27249bc9c1a27f886724cf91ea7))
### [2.6.3](https://github.com/webpack/schema-utils/compare/v2.6.2...v2.6.3) (2020-01-17)
### Bug Fixes
* prefer the `baseDataPath` option from arguments ([#86](https://github.com/webpack/schema-utils/issues/86)) ([e236859](https://github.com/webpack/schema-utils/commit/e236859e85b28e35e1294f86fc1ff596a5031cea))
### [2.6.2](https://github.com/webpack/schema-utils/compare/v2.6.1...v2.6.2) (2020-01-14)
### Bug Fixes
* better handle Windows absolute paths ([#85](https://github.com/webpack/schema-utils/issues/85)) ([1fa2930](https://github.com/webpack/schema-utils/commit/1fa2930a161e907b9fc53a7233d605910afdb883))
### [2.6.1](https://github.com/webpack/schema-utils/compare/v2.6.0...v2.6.1) (2019-11-28)
### Bug Fixes
* typescript declarations ([#84](https://github.com/webpack/schema-utils/issues/84)) ([89d55a9](https://github.com/webpack/schema-utils/commit/89d55a9a8edfa6a8ac8b112f226bb3154e260319))
## [2.6.0](https://github.com/webpack/schema-utils/compare/v2.5.0...v2.6.0) (2019-11-27)
### Features
* support configuration via title ([#81](https://github.com/webpack/schema-utils/issues/81)) ([afddc10](https://github.com/webpack/schema-utils/commit/afddc109f6891cd37a9f1835d50862d119a072bf))
### Bug Fixes
* typescript definitions ([#70](https://github.com/webpack/schema-utils/issues/70)) ([f38158d](https://github.com/webpack/schema-utils/commit/f38158d6d040e2c701622778ae8122fb26a4f990))
## [2.5.0](https://github.com/webpack/schema-utils/compare/v2.4.1...v2.5.0) (2019-10-15)
### Bug Fixes
* rework format for maxLength, minLength ([#67](https://github.com/webpack/schema-utils/issues/67)) ([0d12259](https://github.com/webpack/schema-utils/commit/0d12259))
* support all cases with one number in range ([#64](https://github.com/webpack/schema-utils/issues/64)) ([7fc8069](https://github.com/webpack/schema-utils/commit/7fc8069))
* typescript definition and export naming ([#69](https://github.com/webpack/schema-utils/issues/69)) ([a435b79](https://github.com/webpack/schema-utils/commit/a435b79))
### Features
* "smart" numbers range ([62fb107](https://github.com/webpack/schema-utils/commit/62fb107))
### [2.4.1](https://github.com/webpack/schema-utils/compare/v2.4.0...v2.4.1) (2019-09-27)
### Bug Fixes
* publish definitions ([#58](https://github.com/webpack/schema-utils/issues/58)) ([1885faa](https://github.com/webpack/schema-utils/commit/1885faa))
## [2.4.0](https://github.com/webpack/schema-utils/compare/v2.3.0...v2.4.0) (2019-09-26)
### Features
* better errors when the `type` keyword doesn't exist ([0988be2](https://github.com/webpack/schema-utils/commit/0988be2))
* support $data reference ([#56](https://github.com/webpack/schema-utils/issues/56)) ([d2f11d6](https://github.com/webpack/schema-utils/commit/d2f11d6))
* types definitions ([#52](https://github.com/webpack/schema-utils/issues/52)) ([facb431](https://github.com/webpack/schema-utils/commit/facb431))
## [2.3.0](https://github.com/webpack/schema-utils/compare/v2.2.0...v2.3.0) (2019-09-26)
### Features
* support `not` keyword ([#53](https://github.com/webpack/schema-utils/issues/53)) ([765f458](https://github.com/webpack/schema-utils/commit/765f458))
## [2.2.0](https://github.com/webpack/schema-utils/compare/v2.1.0...v2.2.0) (2019-09-02)
### Features
* better error output for `oneOf` and `anyOf` ([#48](https://github.com/webpack/schema-utils/issues/48)) ([#50](https://github.com/webpack/schema-utils/issues/50)) ([332242f](https://github.com/webpack/schema-utils/commit/332242f))
## [2.1.0](https://github.com/webpack-contrib/schema-utils/compare/v2.0.1...v2.1.0) (2019-08-07)
### Bug Fixes
* throw error on sparse arrays ([#47](https://github.com/webpack-contrib/schema-utils/issues/47)) ([b85ac38](https://github.com/webpack-contrib/schema-utils/commit/b85ac38))
### Features
* export `ValidateError` ([#46](https://github.com/webpack-contrib/schema-utils/issues/46)) ([ff781d7](https://github.com/webpack-contrib/schema-utils/commit/ff781d7))
### [2.0.1](https://github.com/webpack-contrib/schema-utils/compare/v2.0.0...v2.0.1) (2019-07-18)
### Bug Fixes
* error message for empty object ([#44](https://github.com/webpack-contrib/schema-utils/issues/44)) ([0b4b4a2](https://github.com/webpack-contrib/schema-utils/commit/0b4b4a2))
### [2.0.0](https://github.com/webpack-contrib/schema-utils/compare/v1.0.0...v2.0.0) (2019-07-17)
### BREAKING CHANGES
* drop support for Node.js < 8.9.0
* drop support `errorMessage`, please use `description` for links.
* api was changed, please look documentation.
* error messages was fully rewritten.
<a name="1.0.0"></a>
# [1.0.0](https://github.com/webpack-contrib/schema-utils/compare/v0.4.7...v1.0.0) (2018-08-07)
### Features
* **src:** add support for custom error messages ([#33](https://github.com/webpack-contrib/schema-utils/issues/33)) ([1cbe4ef](https://github.com/webpack-contrib/schema-utils/commit/1cbe4ef))
<a name="0.4.7"></a>
## [0.4.7](https://github.com/webpack-contrib/schema-utils/compare/v0.4.6...v0.4.7) (2018-08-07)
### Bug Fixes
* **src:** `node >= v4.0.0` support ([#32](https://github.com/webpack-contrib/schema-utils/issues/32)) ([cb13dd4](https://github.com/webpack-contrib/schema-utils/commit/cb13dd4))
<a name="0.4.6"></a>
## [0.4.6](https://github.com/webpack-contrib/schema-utils/compare/v0.4.5...v0.4.6) (2018-08-06)
### Bug Fixes
* **package:** remove lockfile ([#28](https://github.com/webpack-contrib/schema-utils/issues/28)) ([69f1a81](https://github.com/webpack-contrib/schema-utils/commit/69f1a81))
* **package:** remove unnecessary `webpack` dependency ([#26](https://github.com/webpack-contrib/schema-utils/issues/26)) ([532eaa5](https://github.com/webpack-contrib/schema-utils/commit/532eaa5))
<a name="0.4.5"></a>
## [0.4.5](https://github.com/webpack-contrib/schema-utils/compare/v0.4.4...v0.4.5) (2018-02-13)
### Bug Fixes
* **CHANGELOG:** update broken links ([4483b9f](https://github.com/webpack-contrib/schema-utils/commit/4483b9f))
* **package:** update broken links ([f2494ba](https://github.com/webpack-contrib/schema-utils/commit/f2494ba))
<a name="0.4.4"></a>
## [0.4.4](https://github.com/webpack-contrib/schema-utils/compare/v0.4.3...v0.4.4) (2018-02-13)
### Bug Fixes
* **package:** update `dependencies` ([#22](https://github.com/webpack-contrib/schema-utils/issues/22)) ([3aecac6](https://github.com/webpack-contrib/schema-utils/commit/3aecac6))
<a name="0.4.3"></a>
## [0.4.3](https://github.com/webpack-contrib/schema-utils/compare/v0.4.2...v0.4.3) (2017-12-14)
### Bug Fixes
* **validateOptions:** throw `err` instead of `process.exit(1)` ([#17](https://github.com/webpack-contrib/schema-utils/issues/17)) ([c595eda](https://github.com/webpack-contrib/schema-utils/commit/c595eda))
* **ValidationError:** never return `this` in the ctor ([#16](https://github.com/webpack-contrib/schema-utils/issues/16)) ([c723791](https://github.com/webpack-contrib/schema-utils/commit/c723791))
<a name="0.4.2"></a>
## [0.4.2](https://github.com/webpack-contrib/schema-utils/compare/v0.4.1...v0.4.2) (2017-11-09)
### Bug Fixes
* **validateOptions:** catch `ValidationError` and handle it internally ([#15](https://github.com/webpack-contrib/schema-utils/issues/15)) ([9c5ef5e](https://github.com/webpack-contrib/schema-utils/commit/9c5ef5e))
<a name="0.4.1"></a>
## [0.4.1](https://github.com/webpack-contrib/schema-utils/compare/v0.4.0...v0.4.1) (2017-11-03)
### Bug Fixes
* **ValidationError:** use `Error.captureStackTrace` for `err.stack` handling ([#14](https://github.com/webpack-contrib/schema-utils/issues/14)) ([a6fb974](https://github.com/webpack-contrib/schema-utils/commit/a6fb974))
<a name="0.4.0"></a>
# [0.4.0](https://github.com/webpack-contrib/schema-utils/compare/v0.3.0...v0.4.0) (2017-10-28)
### Features
* add support for `typeof`, `instanceof` (`{Function\|RegExp}`) ([#10](https://github.com/webpack-contrib/schema-utils/issues/10)) ([9f01816](https://github.com/webpack-contrib/schema-utils/commit/9f01816))
<a name="0.3.0"></a>
# [0.3.0](https://github.com/webpack-contrib/schema-utils/compare/v0.2.1...v0.3.0) (2017-04-29)
### Features
* add ValidationError ([#8](https://github.com/webpack-contrib/schema-utils/issues/8)) ([d48f0fb](https://github.com/webpack-contrib/schema-utils/commit/d48f0fb))
<a name="0.2.1"></a>
## [0.2.1](https://github.com/webpack-contrib/schema-utils/compare/v0.2.0...v0.2.1) (2017-03-13)
### Bug Fixes
* Include .babelrc to `files` ([28f0363](https://github.com/webpack-contrib/schema-utils/commit/28f0363))
* Include source to `files` ([43b0f2f](https://github.com/webpack-contrib/schema-utils/commit/43b0f2f))
<a name="0.2.0"></a>
# [0.2.0](https://github.com/webpack-contrib/schema-utils/compare/v0.1.0...v0.2.0) (2017-03-12)
<a name="0.1.0"></a>
# 0.1.0 (2017-03-07)
### Features
* **validations:** add validateOptions module ([ae9b47b](https://github.com/webpack-contrib/schema-utils/commit/ae9b47b))
# Change Log
All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.

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@ -0,0 +1,20 @@
Copyright JS Foundation and other contributors
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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<div align="center">
<a href="http://json-schema.org">
<img width="160" height="160"
src="https://raw.githubusercontent.com/webpack-contrib/schema-utils/master/.github/assets/logo.png">
</a>
<a href="https://github.com/webpack/webpack">
<img width="200" height="200"
src="https://webpack.js.org/assets/icon-square-big.svg">
</a>
</div>
[![npm][npm]][npm-url]
[![node][node]][node-url]
[![deps][deps]][deps-url]
[![tests][tests]][tests-url]
[![coverage][cover]][cover-url]
[![chat][chat]][chat-url]
[![size][size]][size-url]
# schema-utils
Package for validate options in loaders and plugins.
## Getting Started
To begin, you'll need to install `schema-utils`:
```console
npm install schema-utils
```
## API
**schema.json**
```json
{
"type": "object",
"properties": {
"option": {
"type": "boolean"
}
},
"additionalProperties": false
}
```
```js
import schema from "./path/to/schema.json";
import { validate } from "schema-utils";
const options = { option: true };
const configuration = { name: "Loader Name/Plugin Name/Name" };
validate(schema, options, configuration);
```
### `schema`
Type: `String`
JSON schema.
Simple example of schema:
```json
{
"type": "object",
"properties": {
"name": {
"description": "This is description of option.",
"type": "string"
}
},
"additionalProperties": false
}
```
### `options`
Type: `Object`
Object with options.
```js
import schema from "./path/to/schema.json";
import { validate } from "schema-utils";
const options = { foo: "bar" };
validate(schema, { name: 123 }, { name: "MyPlugin" });
```
### `configuration`
Allow to configure validator.
There is an alternative method to configure the `name` and`baseDataPath` options via the `title` property in the schema.
For example:
```json
{
"title": "My Loader options",
"type": "object",
"properties": {
"name": {
"description": "This is description of option.",
"type": "string"
}
},
"additionalProperties": false
}
```
The last word used for the `baseDataPath` option, other words used for the `name` option.
Based on the example above the `name` option equals `My Loader`, the `baseDataPath` option equals `options`.
#### `name`
Type: `Object`
Default: `"Object"`
Allow to setup name in validation errors.
```js
import schema from "./path/to/schema.json";
import { validate } from "schema-utils";
const options = { foo: "bar" };
validate(schema, options, { name: "MyPlugin" });
```
```shell
Invalid configuration object. MyPlugin has been initialised using a configuration object that does not match the API schema.
- configuration.optionName should be a integer.
```
#### `baseDataPath`
Type: `String`
Default: `"configuration"`
Allow to setup base data path in validation errors.
```js
import schema from "./path/to/schema.json";
import { validate } from "schema-utils";
const options = { foo: "bar" };
validate(schema, options, { name: "MyPlugin", baseDataPath: "options" });
```
```shell
Invalid options object. MyPlugin has been initialised using an options object that does not match the API schema.
- options.optionName should be a integer.
```
#### `postFormatter`
Type: `Function`
Default: `undefined`
Allow to reformat errors.
```js
import schema from "./path/to/schema.json";
import { validate } from "schema-utils";
const options = { foo: "bar" };
validate(schema, options, {
name: "MyPlugin",
postFormatter: (formattedError, error) => {
if (error.keyword === "type") {
return `${formattedError}\nAdditional Information.`;
}
return formattedError;
},
});
```
```shell
Invalid options object. MyPlugin has been initialized using an options object that does not match the API schema.
- options.optionName should be a integer.
Additional Information.
```
## Examples
**schema.json**
```json
{
"type": "object",
"properties": {
"name": {
"type": "string"
},
"test": {
"anyOf": [
{ "type": "array" },
{ "type": "string" },
{ "instanceof": "RegExp" }
]
},
"transform": {
"instanceof": "Function"
},
"sourceMap": {
"type": "boolean"
}
},
"additionalProperties": false
}
```
### `Loader`
```js
import { getOptions } from "loader-utils";
import { validate } from "schema-utils";
import schema from "path/to/schema.json";
function loader(src, map) {
const options = getOptions(this);
validate(schema, options, {
name: "Loader Name",
baseDataPath: "options",
});
// Code...
}
export default loader;
```
### `Plugin`
```js
import { validate } from "schema-utils";
import schema from "path/to/schema.json";
class Plugin {
constructor(options) {
validate(schema, options, {
name: "Plugin Name",
baseDataPath: "options",
});
this.options = options;
}
apply(compiler) {
// Code...
}
}
export default Plugin;
```
## Contributing
Please take a moment to read our contributing guidelines if you haven't yet done so.
[CONTRIBUTING](./.github/CONTRIBUTING.md)
## License
[MIT](./LICENSE)
[npm]: https://img.shields.io/npm/v/schema-utils.svg
[npm-url]: https://npmjs.com/package/schema-utils
[node]: https://img.shields.io/node/v/schema-utils.svg
[node-url]: https://nodejs.org
[deps]: https://david-dm.org/webpack/schema-utils.svg
[deps-url]: https://david-dm.org/webpack/schema-utils
[tests]: https://github.com/webpack/schema-utils/workflows/schema-utils/badge.svg
[tests-url]: https://github.com/webpack/schema-utils/actions
[cover]: https://codecov.io/gh/webpack/schema-utils/branch/master/graph/badge.svg
[cover-url]: https://codecov.io/gh/webpack/schema-utils
[chat]: https://badges.gitter.im/webpack/webpack.svg
[chat-url]: https://gitter.im/webpack/webpack
[size]: https://packagephobia.com/badge?p=schema-utils
[size-url]: https://packagephobia.com/result?p=schema-utils

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export default ValidationError;
export type JSONSchema6 = import("json-schema").JSONSchema6;
export type JSONSchema7 = import("json-schema").JSONSchema7;
export type Schema = import("./validate").Schema;
export type ValidationErrorConfiguration =
import("./validate").ValidationErrorConfiguration;
export type PostFormatter = import("./validate").PostFormatter;
export type SchemaUtilErrorObject = import("./validate").SchemaUtilErrorObject;
declare class ValidationError extends Error {
/**
* @param {Array<SchemaUtilErrorObject>} errors
* @param {Schema} schema
* @param {ValidationErrorConfiguration} configuration
*/
constructor(
errors: Array<SchemaUtilErrorObject>,
schema: Schema,
configuration?: ValidationErrorConfiguration
);
/** @type {Array<SchemaUtilErrorObject>} */
errors: Array<SchemaUtilErrorObject>;
/** @type {Schema} */
schema: Schema;
/** @type {string} */
headerName: string;
/** @type {string} */
baseDataPath: string;
/** @type {PostFormatter | null} */
postFormatter: PostFormatter | null;
/**
* @param {string} path
* @returns {Schema}
*/
getSchemaPart(path: string): Schema;
/**
* @param {Schema} schema
* @param {boolean} logic
* @param {Array<Object>} prevSchemas
* @returns {string}
*/
formatSchema(
schema: Schema,
logic?: boolean,
prevSchemas?: Array<Object>
): string;
/**
* @param {Schema=} schemaPart
* @param {(boolean | Array<string>)=} additionalPath
* @param {boolean=} needDot
* @param {boolean=} logic
* @returns {string}
*/
getSchemaPartText(
schemaPart?: Schema | undefined,
additionalPath?: (boolean | Array<string>) | undefined,
needDot?: boolean | undefined,
logic?: boolean | undefined
): string;
/**
* @param {Schema=} schemaPart
* @returns {string}
*/
getSchemaPartDescription(schemaPart?: Schema | undefined): string;
/**
* @param {SchemaUtilErrorObject} error
* @returns {string}
*/
formatValidationError(error: SchemaUtilErrorObject): string;
/**
* @param {Array<SchemaUtilErrorObject>} errors
* @returns {string}
*/
formatValidationErrors(errors: Array<SchemaUtilErrorObject>): string;
}

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import { validate } from "./validate";
import { ValidationError } from "./validate";
import { enableValidation } from "./validate";
import { disableValidation } from "./validate";
import { needValidate } from "./validate";
export {
validate,
ValidationError,
enableValidation,
disableValidation,
needValidate,
};

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export default addAbsolutePathKeyword;
export type Ajv = import("ajv").Ajv;
export type ValidateFunction = import("ajv").ValidateFunction;
export type SchemaUtilErrorObject = import("../validate").SchemaUtilErrorObject;
/**
*
* @param {Ajv} ajv
* @returns {Ajv}
*/
declare function addAbsolutePathKeyword(ajv: Ajv): Ajv;

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export default addUndefinedAsNullKeyword;
export type Ajv = import("ajv").Ajv;
/**
*
* @param {Ajv} ajv
* @returns {Ajv}
*/
declare function addUndefinedAsNullKeyword(ajv: Ajv): Ajv;

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export = Range;
/**
* @typedef {[number, boolean]} RangeValue
*/
/**
* @callback RangeValueCallback
* @param {RangeValue} rangeValue
* @returns {boolean}
*/
declare class Range {
/**
* @param {"left" | "right"} side
* @param {boolean} exclusive
* @returns {">" | ">=" | "<" | "<="}
*/
static getOperator(
side: "left" | "right",
exclusive: boolean
): ">" | ">=" | "<" | "<=";
/**
* @param {number} value
* @param {boolean} logic is not logic applied
* @param {boolean} exclusive is range exclusive
* @returns {string}
*/
static formatRight(value: number, logic: boolean, exclusive: boolean): string;
/**
* @param {number} value
* @param {boolean} logic is not logic applied
* @param {boolean} exclusive is range exclusive
* @returns {string}
*/
static formatLeft(value: number, logic: boolean, exclusive: boolean): string;
/**
* @param {number} start left side value
* @param {number} end right side value
* @param {boolean} startExclusive is range exclusive from left side
* @param {boolean} endExclusive is range exclusive from right side
* @param {boolean} logic is not logic applied
* @returns {string}
*/
static formatRange(
start: number,
end: number,
startExclusive: boolean,
endExclusive: boolean,
logic: boolean
): string;
/**
* @param {Array<RangeValue>} values
* @param {boolean} logic is not logic applied
* @return {RangeValue} computed value and it's exclusive flag
*/
static getRangeValue(values: Array<RangeValue>, logic: boolean): RangeValue;
/** @type {Array<RangeValue>} */
_left: Array<RangeValue>;
/** @type {Array<RangeValue>} */
_right: Array<RangeValue>;
/**
* @param {number} value
* @param {boolean=} exclusive
*/
left(value: number, exclusive?: boolean | undefined): void;
/**
* @param {number} value
* @param {boolean=} exclusive
*/
right(value: number, exclusive?: boolean | undefined): void;
/**
* @param {boolean} logic is not logic applied
* @return {string} "smart" range string representation
*/
format(logic?: boolean): string;
}
declare namespace Range {
export { RangeValue, RangeValueCallback };
}
type RangeValue = [number, boolean];
type RangeValueCallback = (rangeValue: RangeValue) => boolean;

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export function stringHints(schema: Schema, logic: boolean): string[];
export function numberHints(schema: Schema, logic: boolean): string[];
export type Schema = import("../validate").Schema;

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export type JSONSchema4 = import("json-schema").JSONSchema4;
export type JSONSchema6 = import("json-schema").JSONSchema6;
export type JSONSchema7 = import("json-schema").JSONSchema7;
export type ErrorObject = import("ajv").ErrorObject;
export type ValidateFunction = import("ajv").ValidateFunction;
export type Extend = {
formatMinimum?: number | undefined;
formatMaximum?: number | undefined;
formatExclusiveMinimum?: boolean | undefined;
formatExclusiveMaximum?: boolean | undefined;
link?: string | undefined;
undefinedAsNull?: boolean | undefined;
};
export type Schema = (JSONSchema4 | JSONSchema6 | JSONSchema7) & Extend;
export type SchemaUtilErrorObject = ErrorObject & {
children?: Array<ErrorObject>;
};
export type PostFormatter = (
formattedError: string,
error: SchemaUtilErrorObject
) => string;
export type ValidationErrorConfiguration = {
name?: string | undefined;
baseDataPath?: string | undefined;
postFormatter?: PostFormatter | undefined;
};
/**
* @param {Schema} schema
* @param {Array<object> | object} options
* @param {ValidationErrorConfiguration=} configuration
* @returns {void}
*/
export function validate(
schema: Schema,
options: Array<object> | object,
configuration?: ValidationErrorConfiguration | undefined
): void;
export function enableValidation(): void;
export function disableValidation(): void;
export function needValidate(): boolean;
import ValidationError from "./ValidationError";
export { ValidationError };

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"use strict";
const {
validate,
ValidationError,
enableValidation,
disableValidation,
needValidate
} = require("./validate");
module.exports = {
validate,
ValidationError,
enableValidation,
disableValidation,
needValidate
};

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
/** @typedef {import("ajv").Ajv} Ajv */
/** @typedef {import("ajv").ValidateFunction} ValidateFunction */
/** @typedef {import("../validate").SchemaUtilErrorObject} SchemaUtilErrorObject */
/**
* @param {string} message
* @param {object} schema
* @param {string} data
* @returns {SchemaUtilErrorObject}
*/
function errorMessage(message, schema, data) {
return {
// @ts-ignore
// eslint-disable-next-line no-undefined
dataPath: undefined,
// @ts-ignore
// eslint-disable-next-line no-undefined
schemaPath: undefined,
keyword: "absolutePath",
params: {
absolutePath: data
},
message,
parentSchema: schema
};
}
/**
* @param {boolean} shouldBeAbsolute
* @param {object} schema
* @param {string} data
* @returns {SchemaUtilErrorObject}
*/
function getErrorFor(shouldBeAbsolute, schema, data) {
const message = shouldBeAbsolute ? `The provided value ${JSON.stringify(data)} is not an absolute path!` : `A relative path is expected. However, the provided value ${JSON.stringify(data)} is an absolute path!`;
return errorMessage(message, schema, data);
}
/**
*
* @param {Ajv} ajv
* @returns {Ajv}
*/
function addAbsolutePathKeyword(ajv) {
ajv.addKeyword("absolutePath", {
errors: true,
type: "string",
compile(schema, parentSchema) {
/** @type {ValidateFunction} */
const callback = data => {
let passes = true;
const isExclamationMarkPresent = data.includes("!");
if (isExclamationMarkPresent) {
callback.errors = [errorMessage(`The provided value ${JSON.stringify(data)} contains exclamation mark (!) which is not allowed because it's reserved for loader syntax.`, parentSchema, data)];
passes = false;
} // ?:[A-Za-z]:\\ - Windows absolute path
// \\\\ - Windows network absolute path
// \/ - Unix-like OS absolute path
const isCorrectAbsolutePath = schema === /^(?:[A-Za-z]:(\\|\/)|\\\\|\/)/.test(data);
if (!isCorrectAbsolutePath) {
callback.errors = [getErrorFor(schema, parentSchema, data)];
passes = false;
}
return passes;
};
callback.errors = [];
return callback;
}
});
return ajv;
}
var _default = addAbsolutePathKeyword;
exports.default = _default;

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
/** @typedef {import("ajv").Ajv} Ajv */
/**
*
* @param {Ajv} ajv
* @param {string} keyword
* @param {any} definition
*/
function addKeyword(ajv, keyword, definition) {
let customRuleCode;
try {
// @ts-ignore
// eslint-disable-next-line global-require
customRuleCode = require("ajv/lib/dotjs/custom"); // @ts-ignore
const {
RULES
} = ajv;
let ruleGroup;
for (let i = 0; i < RULES.length; i++) {
const rg = RULES[i];
if (typeof rg.type === "undefined") {
ruleGroup = rg;
break;
}
}
const rule = {
keyword,
definition,
custom: true,
code: customRuleCode,
implements: definition.implements
};
ruleGroup.rules.unshift(rule);
RULES.custom[keyword] = rule;
RULES.keywords[keyword] = true;
RULES.all[keyword] = true;
} catch (e) {// Nothing, fallback
}
}
/**
*
* @param {Ajv} ajv
* @returns {Ajv}
*/
function addUndefinedAsNullKeyword(ajv) {
// There is workaround for old versions of ajv, where `before` is not implemented
addKeyword(ajv, "undefinedAsNull", {
modifying: true,
/**
* @param {boolean} kwVal
* @param {unknown} data
* @param {any} parentSchema
* @param {string} dataPath
* @param {unknown} parentData
* @param {number | string} parentDataProperty
* @return {boolean}
*/
validate(kwVal, data, parentSchema, dataPath, parentData, parentDataProperty) {
if (kwVal && parentSchema && typeof parentSchema.enum !== "undefined" && parentData && typeof parentDataProperty === "number") {
const idx =
/** @type {number} */
parentDataProperty;
const parentDataRef =
/** @type {any[]} */
parentData;
if (typeof parentDataRef[idx] === "undefined") {
parentDataRef[idx] = null;
}
}
return true;
}
});
return ajv;
}
var _default = addUndefinedAsNullKeyword;
exports.default = _default;

163
node_modules/less-loader/node_modules/schema-utils/dist/util/Range.js generated vendored Normal file
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"use strict";
/**
* @typedef {[number, boolean]} RangeValue
*/
/**
* @callback RangeValueCallback
* @param {RangeValue} rangeValue
* @returns {boolean}
*/
class Range {
/**
* @param {"left" | "right"} side
* @param {boolean} exclusive
* @returns {">" | ">=" | "<" | "<="}
*/
static getOperator(side, exclusive) {
if (side === "left") {
return exclusive ? ">" : ">=";
}
return exclusive ? "<" : "<=";
}
/**
* @param {number} value
* @param {boolean} logic is not logic applied
* @param {boolean} exclusive is range exclusive
* @returns {string}
*/
static formatRight(value, logic, exclusive) {
if (logic === false) {
return Range.formatLeft(value, !logic, !exclusive);
}
return `should be ${Range.getOperator("right", exclusive)} ${value}`;
}
/**
* @param {number} value
* @param {boolean} logic is not logic applied
* @param {boolean} exclusive is range exclusive
* @returns {string}
*/
static formatLeft(value, logic, exclusive) {
if (logic === false) {
return Range.formatRight(value, !logic, !exclusive);
}
return `should be ${Range.getOperator("left", exclusive)} ${value}`;
}
/**
* @param {number} start left side value
* @param {number} end right side value
* @param {boolean} startExclusive is range exclusive from left side
* @param {boolean} endExclusive is range exclusive from right side
* @param {boolean} logic is not logic applied
* @returns {string}
*/
static formatRange(start, end, startExclusive, endExclusive, logic) {
let result = "should be";
result += ` ${Range.getOperator(logic ? "left" : "right", logic ? startExclusive : !startExclusive)} ${start} `;
result += logic ? "and" : "or";
result += ` ${Range.getOperator(logic ? "right" : "left", logic ? endExclusive : !endExclusive)} ${end}`;
return result;
}
/**
* @param {Array<RangeValue>} values
* @param {boolean} logic is not logic applied
* @return {RangeValue} computed value and it's exclusive flag
*/
static getRangeValue(values, logic) {
let minMax = logic ? Infinity : -Infinity;
let j = -1;
const predicate = logic ?
/** @type {RangeValueCallback} */
([value]) => value <= minMax :
/** @type {RangeValueCallback} */
([value]) => value >= minMax;
for (let i = 0; i < values.length; i++) {
if (predicate(values[i])) {
[minMax] = values[i];
j = i;
}
}
if (j > -1) {
return values[j];
}
return [Infinity, true];
}
constructor() {
/** @type {Array<RangeValue>} */
this._left = [];
/** @type {Array<RangeValue>} */
this._right = [];
}
/**
* @param {number} value
* @param {boolean=} exclusive
*/
left(value, exclusive = false) {
this._left.push([value, exclusive]);
}
/**
* @param {number} value
* @param {boolean=} exclusive
*/
right(value, exclusive = false) {
this._right.push([value, exclusive]);
}
/**
* @param {boolean} logic is not logic applied
* @return {string} "smart" range string representation
*/
format(logic = true) {
const [start, leftExclusive] = Range.getRangeValue(this._left, logic);
const [end, rightExclusive] = Range.getRangeValue(this._right, !logic);
if (!Number.isFinite(start) && !Number.isFinite(end)) {
return "";
}
const realStart = leftExclusive ? start + 1 : start;
const realEnd = rightExclusive ? end - 1 : end; // e.g. 5 < x < 7, 5 < x <= 6, 6 <= x <= 6
if (realStart === realEnd) {
return `should be ${logic ? "" : "!"}= ${realStart}`;
} // e.g. 4 < x < ∞
if (Number.isFinite(start) && !Number.isFinite(end)) {
return Range.formatLeft(start, logic, leftExclusive);
} // e.g. ∞ < x < 4
if (!Number.isFinite(start) && Number.isFinite(end)) {
return Range.formatRight(end, logic, rightExclusive);
}
return Range.formatRange(start, end, leftExclusive, rightExclusive, logic);
}
}
module.exports = Range;

105
node_modules/less-loader/node_modules/schema-utils/dist/util/hints.js generated vendored Normal file
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"use strict";
const Range = require("./Range");
/** @typedef {import("../validate").Schema} Schema */
/**
* @param {Schema} schema
* @param {boolean} logic
* @return {string[]}
*/
module.exports.stringHints = function stringHints(schema, logic) {
const hints = [];
let type = "string";
const currentSchema = { ...schema
};
if (!logic) {
const tmpLength = currentSchema.minLength;
const tmpFormat = currentSchema.formatMinimum;
const tmpExclusive = currentSchema.formatExclusiveMaximum;
currentSchema.minLength = currentSchema.maxLength;
currentSchema.maxLength = tmpLength;
currentSchema.formatMinimum = currentSchema.formatMaximum;
currentSchema.formatMaximum = tmpFormat;
currentSchema.formatExclusiveMaximum = !currentSchema.formatExclusiveMinimum;
currentSchema.formatExclusiveMinimum = !tmpExclusive;
}
if (typeof currentSchema.minLength === "number") {
if (currentSchema.minLength === 1) {
type = "non-empty string";
} else {
const length = Math.max(currentSchema.minLength - 1, 0);
hints.push(`should be longer than ${length} character${length > 1 ? "s" : ""}`);
}
}
if (typeof currentSchema.maxLength === "number") {
if (currentSchema.maxLength === 0) {
type = "empty string";
} else {
const length = currentSchema.maxLength + 1;
hints.push(`should be shorter than ${length} character${length > 1 ? "s" : ""}`);
}
}
if (currentSchema.pattern) {
hints.push(`should${logic ? "" : " not"} match pattern ${JSON.stringify(currentSchema.pattern)}`);
}
if (currentSchema.format) {
hints.push(`should${logic ? "" : " not"} match format ${JSON.stringify(currentSchema.format)}`);
}
if (currentSchema.formatMinimum) {
hints.push(`should be ${currentSchema.formatExclusiveMinimum ? ">" : ">="} ${JSON.stringify(currentSchema.formatMinimum)}`);
}
if (currentSchema.formatMaximum) {
hints.push(`should be ${currentSchema.formatExclusiveMaximum ? "<" : "<="} ${JSON.stringify(currentSchema.formatMaximum)}`);
}
return [type].concat(hints);
};
/**
* @param {Schema} schema
* @param {boolean} logic
* @return {string[]}
*/
module.exports.numberHints = function numberHints(schema, logic) {
const hints = [schema.type === "integer" ? "integer" : "number"];
const range = new Range();
if (typeof schema.minimum === "number") {
range.left(schema.minimum);
}
if (typeof schema.exclusiveMinimum === "number") {
range.left(schema.exclusiveMinimum, true);
}
if (typeof schema.maximum === "number") {
range.right(schema.maximum);
}
if (typeof schema.exclusiveMaximum === "number") {
range.right(schema.exclusiveMaximum, true);
}
const rangeFormat = range.format(logic);
if (rangeFormat) {
hints.push(rangeFormat);
}
if (typeof schema.multipleOf === "number") {
hints.push(`should${logic ? "" : " not"} be multiple of ${schema.multipleOf}`);
}
return hints;
};

258
node_modules/less-loader/node_modules/schema-utils/dist/validate.js generated vendored Normal file
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@ -0,0 +1,258 @@
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.validate = validate;
exports.enableValidation = enableValidation;
exports.disableValidation = disableValidation;
exports.needValidate = needValidate;
Object.defineProperty(exports, "ValidationError", {
enumerable: true,
get: function () {
return _ValidationError.default;
}
});
var _absolutePath = _interopRequireDefault(require("./keywords/absolutePath"));
var _undefinedAsNull = _interopRequireDefault(require("./keywords/undefinedAsNull"));
var _ValidationError = _interopRequireDefault(require("./ValidationError"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
/**
* @template T
* @param fn {(function(): any) | undefined}
* @returns {function(): T}
*/
const memoize = fn => {
let cache = false;
/** @type {T} */
let result;
return () => {
if (cache) {
return result;
}
result =
/** @type {function(): any} */
fn();
cache = true; // Allow to clean up memory for fn
// and all dependent resources
// eslint-disable-next-line no-undefined, no-param-reassign
fn = undefined;
return result;
};
};
const getAjv = memoize(() => {
// Use CommonJS require for ajv libs so TypeScript consumers aren't locked into esModuleInterop (see #110).
// eslint-disable-next-line global-require
const Ajv = require("ajv"); // eslint-disable-next-line global-require
const ajvKeywords = require("ajv-keywords");
const ajv = new Ajv({
allErrors: true,
verbose: true,
$data: true
});
ajvKeywords(ajv, ["instanceof", "formatMinimum", "formatMaximum", "patternRequired"]); // Custom keywords
(0, _absolutePath.default)(ajv);
(0, _undefinedAsNull.default)(ajv);
return ajv;
});
/** @typedef {import("json-schema").JSONSchema4} JSONSchema4 */
/** @typedef {import("json-schema").JSONSchema6} JSONSchema6 */
/** @typedef {import("json-schema").JSONSchema7} JSONSchema7 */
/** @typedef {import("ajv").ErrorObject} ErrorObject */
/** @typedef {import("ajv").ValidateFunction} ValidateFunction */
/**
* @typedef {Object} Extend
* @property {number=} formatMinimum
* @property {number=} formatMaximum
* @property {boolean=} formatExclusiveMinimum
* @property {boolean=} formatExclusiveMaximum
* @property {string=} link
* @property {boolean=} undefinedAsNull
*/
/** @typedef {(JSONSchema4 | JSONSchema6 | JSONSchema7) & Extend} Schema */
/** @typedef {ErrorObject & { children?: Array<ErrorObject>}} SchemaUtilErrorObject */
/**
* @callback PostFormatter
* @param {string} formattedError
* @param {SchemaUtilErrorObject} error
* @returns {string}
*/
/**
* @typedef {Object} ValidationErrorConfiguration
* @property {string=} name
* @property {string=} baseDataPath
* @property {PostFormatter=} postFormatter
*/
/**
* @param {SchemaUtilErrorObject} error
* @param {number} idx
* @returns {SchemaUtilErrorObject}
*/
function applyPrefix(error, idx) {
// eslint-disable-next-line no-param-reassign
error.dataPath = `[${idx}]${error.dataPath}`;
if (error.children) {
error.children.forEach(err => applyPrefix(err, idx));
}
return error;
}
let skipValidation = false; // We use `process.env.SKIP_VALIDATION` because you can have multiple `schema-utils` with different version,
// so we want to disable it globally, `process.env` doesn't supported by browsers, so we have the local `skipValidation` variables
// Enable validation
function enableValidation() {
skipValidation = false; // Disable validation for any versions
if (process && process.env) {
process.env.SKIP_VALIDATION = "n";
}
} // Disable validation
function disableValidation() {
skipValidation = true;
if (process && process.env) {
process.env.SKIP_VALIDATION = "y";
}
} // Check if we need to confirm
function needValidate() {
if (skipValidation) {
return false;
}
if (process && process.env && process.env.SKIP_VALIDATION) {
const value = process.env.SKIP_VALIDATION.trim();
if (/^(?:y|yes|true|1|on)$/i.test(value)) {
return false;
}
if (/^(?:n|no|false|0|off)$/i.test(value)) {
return true;
}
}
return true;
}
/**
* @param {Schema} schema
* @param {Array<object> | object} options
* @param {ValidationErrorConfiguration=} configuration
* @returns {void}
*/
function validate(schema, options, configuration) {
if (!needValidate()) {
return;
}
let errors = [];
if (Array.isArray(options)) {
for (let i = 0; i <= options.length - 1; i++) {
errors.push(...validateObject(schema, options[i]).map(err => applyPrefix(err, i)));
}
} else {
errors = validateObject(schema, options);
}
if (errors.length > 0) {
throw new _ValidationError.default(errors, schema, configuration);
}
}
/** @typedef {WeakMap<Schema, ValidateFunction>} */
const schemaCache = new WeakMap();
/**
* @param {Schema} schema
* @param {Array<object> | object} options
* @returns {Array<SchemaUtilErrorObject>}
*/
function validateObject(schema, options) {
let compiledSchema = schemaCache.get(schema);
if (!compiledSchema) {
compiledSchema = getAjv().compile(schema);
schemaCache.set(schema, compiledSchema);
}
const valid = compiledSchema(options);
if (valid) return [];
return compiledSchema.errors ? filterErrors(compiledSchema.errors) : [];
}
/**
* @param {Array<ErrorObject>} errors
* @returns {Array<SchemaUtilErrorObject>}
*/
function filterErrors(errors) {
/** @type {Array<SchemaUtilErrorObject>} */
let newErrors = [];
for (const error of
/** @type {Array<SchemaUtilErrorObject>} */
errors) {
const {
dataPath
} = error;
/** @type {Array<SchemaUtilErrorObject>} */
let children = [];
newErrors = newErrors.filter(oldError => {
if (oldError.dataPath.includes(dataPath)) {
if (oldError.children) {
children = children.concat(oldError.children.slice(0));
} // eslint-disable-next-line no-undefined, no-param-reassign
oldError.children = undefined;
children.push(oldError);
return false;
}
return true;
});
if (children.length) {
error.children = children;
}
newErrors.push(error);
}
return newErrors;
}

78
node_modules/less-loader/node_modules/schema-utils/package.json generated vendored Normal file
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{
"name": "schema-utils",
"version": "3.3.0",
"description": "webpack Validation Utils",
"license": "MIT",
"repository": "webpack/schema-utils",
"author": "webpack Contrib (https://github.com/webpack-contrib)",
"homepage": "https://github.com/webpack/schema-utils",
"bugs": "https://github.com/webpack/schema-utils/issues",
"funding": {
"type": "opencollective",
"url": "https://opencollective.com/webpack"
},
"main": "dist/index.js",
"types": "declarations/index.d.ts",
"engines": {
"node": ">= 10.13.0"
},
"scripts": {
"start": "npm run build -- -w",
"clean": "del-cli dist declarations",
"prebuild": "npm run clean",
"build:types": "tsc --declaration --emitDeclarationOnly --outDir declarations && prettier \"declarations/**/*.ts\" --write",
"build:code": "cross-env NODE_ENV=production babel src -d dist --copy-files",
"build": "npm-run-all -p \"build:**\"",
"commitlint": "commitlint --from=master",
"security": "npm audit --production",
"fmt:check": "prettier \"{**/*,*}.{js,json,md,yml,css,ts}\" --list-different",
"lint:js": "eslint --cache .",
"lint:types": "tsc --pretty --noEmit",
"lint": "npm-run-all lint:js lint:types fmt:check",
"fmt": "npm run fmt:check -- --write",
"fix:js": "npm run lint:js -- --fix",
"fix": "npm-run-all fix:js fmt",
"test:only": "cross-env NODE_ENV=test jest",
"test:watch": "npm run test:only -- --watch",
"test:coverage": "npm run test:only -- --collectCoverageFrom=\"src/**/*.js\" --coverage",
"pretest": "npm run lint",
"test": "npm run test:coverage",
"prepare": "npm run build && husky install",
"release": "standard-version"
},
"files": [
"dist",
"declarations"
],
"dependencies": {
"@types/json-schema": "^7.0.8",
"ajv": "^6.12.5",
"ajv-keywords": "^3.5.2"
},
"devDependencies": {
"@babel/cli": "^7.14.3",
"@babel/core": "^7.14.6",
"@babel/preset-env": "^7.14.7",
"@commitlint/cli": "^12.1.4",
"@commitlint/config-conventional": "^12.1.4",
"@webpack-contrib/eslint-config-webpack": "^3.0.0",
"babel-jest": "^27.0.6",
"cross-env": "^7.0.3",
"del": "^6.0.0",
"del-cli": "^3.0.1",
"eslint": "^7.31.0",
"eslint-config-prettier": "^8.3.0",
"eslint-plugin-import": "^2.23.4",
"husky": "^6.0.0",
"jest": "^27.0.6",
"lint-staged": "^11.0.1",
"npm-run-all": "^4.1.5",
"prettier": "^2.3.2",
"standard-version": "^9.3.1",
"typescript": "^4.3.5",
"webpack": "^5.45.1"
},
"keywords": [
"webpack"
]
}

85
node_modules/less-loader/package.json generated vendored Normal file
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@ -0,0 +1,85 @@
{
"name": "less-loader",
"version": "7.3.0",
"description": "A Less loader for webpack. Compiles Less to CSS.",
"license": "MIT",
"repository": "webpack-contrib/less-loader",
"author": "Johannes Ewald @jhnns",
"homepage": "https://github.com/webpack-contrib/less-loader",
"bugs": "https://github.com/webpack-contrib/less-loader/issues",
"funding": {
"type": "opencollective",
"url": "https://opencollective.com/webpack"
},
"main": "dist/cjs.js",
"engines": {
"node": ">= 10.13.0"
},
"scripts": {
"start": "npm run build -- -w",
"clean": "del-cli dist",
"prebuild": "npm run clean",
"build": "cross-env NODE_ENV=production babel src -d dist --copy-files",
"commitlint": "commitlint --from=master",
"security": "npm audit",
"lint:prettier": "prettier --list-different .",
"lint:js": "eslint --cache .",
"lint": "npm-run-all -l -p \"lint:**\"",
"test:only": "cross-env NODE_ENV=test jest",
"test:watch": "npm run test:only -- --watch",
"test:coverage": "npm run test:only -- --collectCoverageFrom=\"src/**/*.js\" --coverage",
"pretest": "npm run lint",
"test": "npm run test:coverage",
"prepare": "npm run build",
"release": "standard-version",
"defaults": "webpack-defaults"
},
"files": [
"dist"
],
"peerDependencies": {
"less": "^3.5.0 || ^4.0.0",
"webpack": "^4.0.0 || ^5.0.0"
},
"dependencies": {
"klona": "^2.0.4",
"loader-utils": "^2.0.0",
"schema-utils": "^3.0.0"
},
"devDependencies": {
"@babel/cli": "^7.12.10",
"@babel/core": "^7.12.10",
"@babel/preset-env": "^7.12.11",
"@commitlint/cli": "^11.0.0",
"@commitlint/config-conventional": "^11.0.0",
"@webpack-contrib/defaults": "^6.3.0",
"@webpack-contrib/eslint-config-webpack": "^3.0.0",
"babel-jest": "^26.6.3",
"cross-env": "^7.0.3",
"del": "^6.0.0",
"del-cli": "^3.0.1",
"eslint": "^7.18.0",
"eslint-config-prettier": "^7.2.0",
"eslint-plugin-import": "^2.22.1",
"eslint-plugin-prettier": "^3.3.0",
"husky": "^4.3.8",
"jest": "^26.6.3",
"less": "^4.1.0",
"lint-staged": "^10.5.3",
"memfs": "^3.2.0",
"npm-run-all": "^4.1.5",
"prettier": "^2.2.1",
"standard-version": "^9.1.0",
"strip-ansi": "^6.0.0",
"webpack": "^5.16.0"
},
"keywords": [
"webpack",
"loader",
"less",
"lesscss",
"less.js",
"css",
"preprocessor"
]
}