forked from zhurui/management
46 lines
1.1 KiB
JavaScript
46 lines
1.1 KiB
JavaScript
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module.exports = function postcssPrefixSelector(options) {
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const prefix = options.prefix;
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const prefixWithSpace = /\s+$/.test(prefix) ? prefix : `${prefix} `;
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return function(root) {
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root.walkRules(rule => {
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const keyframeRules = [
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'keyframes',
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'-webkit-keyframes',
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'-moz-keyframes',
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'-o-keyframes'
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];
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if (rule.parent && keyframeRules.includes(rule.parent.name)) {
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return;
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}
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rule.selectors = rule.selectors.map(selector => {
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if (options.exclude && excludeSelector(selector, options.exclude)) {
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return selector;
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}
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if (options.transform) {
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return options.transform(
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prefix,
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selector,
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prefixWithSpace + selector
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);
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}
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return prefixWithSpace + selector;
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});
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});
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};
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};
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function excludeSelector(selector, excludeArr) {
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return excludeArr.some(excludeRule => {
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if (excludeRule instanceof RegExp) {
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return excludeRule.test(selector);
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}
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return selector === excludeRule;
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});
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}
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