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https://github.com/facebook/docusaurus.git
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ad31facb32
* fix several lint warnings, add missing types, cleanup * fix EnumChangefreq issue * better utilization of EnumChangefreq type * update test snapshot
44 lines
1.5 KiB
JavaScript
44 lines
1.5 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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const postcss = require('postcss');
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/*
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This PostCSS plugin will remove duplicate/same custom properties (which are actually overridden ones) **only** from `:root` selector.
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Depending on the presence of an `!important` rule in value of custom property, the following actions will happens:
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- If the same custom properties do **not** have an `!important` rule, then all of them will be removed except for the last one (which will actually be applied).
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- If the same custom properties have at least one `!important` rule, then only those properties that do not have this rule will be removed.
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*/
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module.exports = postcss.plugin(
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'postcss-remove-overridden-custom-properties',
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() => {
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return (root) => {
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root.walkDecls((decl) => {
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if (decl.parent.selector !== ':root') {
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return;
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}
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const sameProperties =
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decl.parent.nodes.filter((n) => n.prop === decl.prop) || [];
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const hasImportantProperties = sameProperties.some((p) =>
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Object.prototype.hasOwnProperty.call(p, 'important'),
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);
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const overriddenProperties = hasImportantProperties
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? sameProperties.filter(
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(p) => !Object.prototype.hasOwnProperty.call(p, 'important'),
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)
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: sameProperties.slice(0, -1);
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overriddenProperties.map((p) => p.remove());
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});
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};
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},
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);
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