64 lines
1.3 KiB
JavaScript
64 lines
1.3 KiB
JavaScript
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import { packNumber } from './Number.js';
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const MATH_FUNCTIONS = new Set([
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'calc',
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'min',
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'max',
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'clamp'
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]);
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const LENGTH_UNIT = new Set([
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// absolute length units
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'px',
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'mm',
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'cm',
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'in',
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'pt',
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'pc',
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// relative length units
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'em',
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'ex',
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'ch',
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'rem',
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// viewport-percentage lengths
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'vh',
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'vw',
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'vmin',
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'vmax',
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'vm'
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]);
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export default function compressDimension(node, item) {
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const value = packNumber(node.value);
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node.value = value;
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if (value === '0' && this.declaration !== null && this.atrulePrelude === null) {
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const unit = node.unit.toLowerCase();
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// only length values can be compressed
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if (!LENGTH_UNIT.has(unit)) {
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return;
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}
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// issue #362: shouldn't remove unit in -ms-flex since it breaks flex in IE10/11
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// issue #200: shouldn't remove unit in flex since it breaks flex in IE10/11
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if (this.declaration.property === '-ms-flex' ||
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this.declaration.property === 'flex') {
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return;
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}
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// issue #222: don't remove units inside calc
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if (this.function && MATH_FUNCTIONS.has(this.function.name)) {
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return;
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}
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item.data = {
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type: 'Number',
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loc: node.loc,
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value
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};
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}
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};
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