43 lines
1.0 KiB
JavaScript
43 lines
1.0 KiB
JavaScript
module.exports = options => ({
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terserOptions: {
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compress: {
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// turn off flags with small gains to speed up minification
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arrows: false,
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collapse_vars: false, // 0.3kb
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comparisons: false,
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computed_props: false,
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hoist_funs: false,
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hoist_props: false,
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hoist_vars: false,
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inline: false,
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loops: false,
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negate_iife: false,
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properties: false,
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reduce_funcs: false,
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reduce_vars: false,
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switches: false,
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toplevel: false,
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typeofs: false,
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// a few flags with noticeable gains/speed ratio
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// numbers based on out of the box vendor bundle
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booleans: true, // 0.7kb
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if_return: true, // 0.4kb
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sequences: true, // 0.7kb
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unused: true, // 2.3kb
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// required features to drop conditional branches
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conditionals: true,
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dead_code: true,
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evaluate: true
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},
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mangle: {
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safari10: true
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}
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},
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sourceMap: options.productionSourceMap,
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cache: true,
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parallel: options.parallel,
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extractComments: false
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})
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