Last change
on this file since 6a80231 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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File size:
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1 | import postcss from 'postcss';
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2 |
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3 | const mediaRegExp = /^media$/i;
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4 | const prefersInterfaceRegExp = /\(\s*prefers-color-scheme\s*:\s*(dark|light|no-preference)\s*\)/i;
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5 | const colorIndexByStyle = {
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6 | dark: 48,
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7 | light: 70,
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8 | 'no-preference': 22
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9 | };
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10 |
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11 | const prefersInterfaceReplacer = ($0, style) => `(color-index: ${colorIndexByStyle[style.toLowerCase()]})`;
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12 |
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13 | var postcss$1 = postcss.plugin('postcss-prefers-color-scheme', opts => {
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14 | const preserve = 'preserve' in Object(opts) ? opts.preserve : true;
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15 | return root => {
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16 | root.walkAtRules(mediaRegExp, atRule => {
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17 | const params = atRule.params;
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18 | const altParams = params.replace(prefersInterfaceRegExp, prefersInterfaceReplacer);
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19 |
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20 | if (params !== altParams) {
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21 | if (preserve) {
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22 | atRule.cloneBefore({
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23 | params: altParams
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24 | });
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25 | } else {
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26 | atRule.params = altParams;
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27 | }
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28 | }
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29 | });
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30 | };
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31 | });
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32 |
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33 | export default postcss$1;
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