每天一个JavaScript实例-展示设置和获取CSS样式设置

时间：2021-12-16 05:20:37
<!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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