Recently I was looking into how libraries like jQuery get the compute style of an element. I found that in its simplest form, getting computed style is one step:

function getStyle(el, prop) {
	return el.currentStyle ?
		el.currentStyle[prop] : // IE
		document.defaultView.getComputedStyle(el, "")[prop];
}

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Element wrappers are coming. We are going to see more frameworks using wrappers for JavaScript DOM Elements.

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