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December 30, 2015 06:29
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Count total rules and selectors for each CSS file in a web page
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| function showCSSCountInfo(options) { | |
| var styleSheets = document.styleSheets, | |
| totalStyleSheets = styleSheets.length; | |
| options = options || {}; | |
| alert_exceeded = options.alert_exceeded || true; | |
| max = options.max || 4096; | |
| for (var j = 0; j < totalStyleSheets; j++) { | |
| var styleSheet = styleSheets[j], | |
| rules = styleSheet.cssRules, | |
| totalSelectorsInStylesheet = 0; | |
| var totalRulesInStylesheet = rules ? rules.length : 0; | |
| for (var i = 0; i < totalRulesInStylesheet; i++) { | |
| if (rules[i].selectorText) { | |
| try { | |
| totalSelectorsInStylesheet += rules[i].selectorText.split(',').length; | |
| } | |
| catch (err) { | |
| console.log(err); | |
| } | |
| } | |
| } | |
| console.log("Stylesheet: " + styleSheet.href); | |
| console.log("Total rules: " + totalRulesInStylesheet); | |
| console.log("Total selectors: " + totalSelectorsInStylesheet); | |
| if (alert_exceeded && totalSelectorsInStylesheet > max) { | |
| alert("Stylesheet: " + styleSheet.href + "\n" + "Total rules: " + totalRulesInStylesheet + "\n" + "Total selectors: " + totalSelectorsInStylesheet) | |
| } | |
| } | |
| } |
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