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57 lines
1.3 KiB
57 lines
1.3 KiB
2 years ago
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'use strict';
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const charset = 'charset';
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// eslint-disable-next-line no-control-regex
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const nonAscii = /[^\x00-\x7F]/;
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/**
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* @typedef {{add?: boolean}} Options
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*/
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/**
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* @type {import('postcss').PluginCreator<Options>}
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* @param {Options} opts
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* @return {import('postcss').Plugin}
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*/
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function pluginCreator(opts = {}) {
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return {
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postcssPlugin: 'postcss-normalize-' + charset,
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OnceExit(css, { AtRule }) {
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/** @type {import('postcss').AtRule | undefined} */
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let charsetRule;
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/** @type {import('postcss').Node | undefined} */
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let nonAsciiNode;
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css.walk((node) => {
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if (node.type === 'atrule' && node.name === charset) {
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if (!charsetRule) {
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charsetRule = node;
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}
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node.remove();
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} else if (
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!nonAsciiNode &&
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node.parent === css &&
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nonAscii.test(node.toString())
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) {
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nonAsciiNode = node;
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}
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});
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if (nonAsciiNode) {
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if (!charsetRule && opts.add !== false) {
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charsetRule = new AtRule({
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name: charset,
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params: '"utf-8"',
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});
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}
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if (charsetRule) {
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charsetRule.source = nonAsciiNode.source;
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css.prepend(charsetRule);
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}
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}
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},
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};
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}
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pluginCreator.postcss = true;
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module.exports = pluginCreator;
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