


Extracting Element's CSS Property Values as Set
When needing to obtain the CSS property values of an element as they were initially defined, the function getMatchedStyle offers a solution. This function iterates through the matched CSS rules in descending order of priority, considering both element styles and property importance.
function getMatchedStyle(elem, property){ var val = elem.style.getPropertyValue(property); if(elem.style.getPropertyPriority(property)) return val; var rules = getMatchedCSSRules(elem); for(var i = rules.length; i--;){ var important = r.style.getPropertyPriority(property); if(val == null || important){ val = r.style.getPropertyValue(property); if(important) break; } } return val; }
By considering property importance and element styles, getMatchedStyle accurately returns the CSS property value as set in the stylesheet.
Usage Example
Consider the following HTML and CSS code:
<div class="b">div 1</div> <div> <pre class="brush:php;toolbar:false">div { width: 100px; } .d3 { width: auto !important; } div#b { width: 80%; } div#c.c { width: 444px; } x, div.a { width: 50%; } .a { width: 75%; }
Executing the following JavaScript code:
var d = document.querySelectorAll('div'); for(var i = 0; i <p>will output:</p><pre class="brush:php;toolbar:false">div 1: 100px div 2: 50% div 3: auto div 4: 44em
This demonstrates the function's ability to accurately extract the set CSS width values of the elements.
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