JavaScript-leaning/jqury.html at master · LaderBen/JavaScript-leaning · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        //css中有复合样式以及单一样式
        //复合样式：background、border
        //单一样式：height、width、positon
        //getStyle（）函数无法获取复合样式，其只能获取单一样式
        function css(obj, name, value) {
            if (arguments.length == 2) {
                return obj.style[name];
            } else {
                obj.style[name] = value;
            }
        }
        window.onclick = function () {
            var oDiv = document.getElementById('div1');
            //alert(css(oDiv,'width'));
            css(oDiv, 'background', 'green');
        };
    </script>
</head>

<body>
    <div id="div1" style="width:200px;height:200px;height:200px;background: red;">
    </div>
</body>

</html>