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cssplexity.js
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cssplexity.js
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var css = require('css');
var cssSelectorTree = require('css-selector-tree');
function calculcateSelectorComplexity (selector) {
if (!selector) {
return false;
}
var conditions = cssSelectorTree.conditions(selector);
if (conditions === false) {
return false;
}
return (conditions.length + 1);
}
function parseCss (code) {
if (!code) {
return false;
}
var obj;
var results = [];
try {
obj = css.parse(code);
} catch (e) {
return false;
}
if (obj.stylesheet && obj.stylesheet.rules) {
obj.stylesheet.rules.forEach(function (rule) {
if (rule.selectors && rule.selectors.length) {
rule.selectors.forEach(function (selector) {
results.push({
selector: selector,
complexity: calculcateSelectorComplexity(selector)
});
});
}
});
}
if (!results.length) {
return false;
}
return results.sort(function (a, b) {
return a.complexity - b.complexity;
}).reverse();
}
module.exports = {
selector: calculcateSelectorComplexity,
parse: parseCss
};