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56 lines
1.4 KiB
56 lines
1.4 KiB
module.exports = function specificity(simpleSelector) { |
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var A = 0; |
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var B = 0; |
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var C = 0; |
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|
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simpleSelector.children.each(function walk(node) { |
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switch (node.type) { |
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case 'SelectorList': |
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case 'Selector': |
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node.children.each(walk); |
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break; |
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|
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case 'IdSelector': |
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A++; |
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break; |
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|
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case 'ClassSelector': |
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case 'AttributeSelector': |
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B++; |
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break; |
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|
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case 'PseudoClassSelector': |
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switch (node.name.toLowerCase()) { |
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case 'not': |
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node.children.each(walk); |
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break; |
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|
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case 'before': |
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case 'after': |
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case 'first-line': |
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case 'first-letter': |
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C++; |
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break; |
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// TODO: support for :nth-*(.. of <SelectorList>), :matches(), :has() |
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default: |
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B++; |
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} |
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break; |
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case 'PseudoElementSelector': |
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C++; |
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break; |
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case 'TypeSelector': |
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// ignore universal selector |
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if (node.name.charAt(node.name.length - 1) !== '*') { |
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C++; |
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} |
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break; |
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} |
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}); |
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return [A, B, C]; |
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};
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