每天一个JavaScript实例-展示设置和获取CSS样式设置

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>每天一个JavaScript实例-展示设置和获取CSS样式设置</title>
<style>
	#date{
		width:200px;
		background-color:lime;
	}
</style>
<script>
function getStyle(date,cssprop,cssprop2){
	//IE
	if(date.currentStyle){
		return date.currentStyle[cssprop];
	}else if(document.defaultView && document.defaultView.getComputedStyle){
		//console.log(document.defaultView.getComputedStyle(date,null).getPropertyValue(cssprop));
		return document.defaultView.getComputedStyle(date,null).getPropertyValue(cssprop2);
	}else{
		return null;
	}
}
window.onload = function(){
	var date = document.getElementById("date");
	var color = getStyle(date,"background-color","background-color");
	console.log(color);
	date.style.width= "500px";
	date.style.backgroundColor= "yellow";
	console.log(date.style.width);
	console.log(date.style.backgroundColor);
	//数组表示法
	date.style["fontFamily"] = "courier";
	//展示覆盖属性
	var style = date.getAttribute("style");
	console.log(style);

	date.setAttribute("style","height:100px");
	console.log(document.defaultView.getComputedStyle(date,null).getPropertyValue("fontFamily"));//null
	console.log(document.defaultView.getComputedStyle(date,null).getPropertyValue("font-family"));//STHeiti

	var style = date.getAttribute("style");
	
	//date.style["fontFamily"]="微软雅黑";
	var font = getStyle(date,"fontFamily","font-family");
	//console.log(font);
}
</script>
</head>

<body>

<div id = "date" style="color:purple">
aa
</div>

</body>
</html>

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