lovecoding
/
vipAllDay


			
				
					
						
						
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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>
    <style>
        #box {
            width: 200px;
            height: 200px;
            background: #f00;
        }
    </style>
</head>
<body>
    <div id="box"></div>
    <button>放大</button>
    <script>
        var box = document.getElementById("box");
        var btn = document.querySelector("button");
        btn.onclick = function() {
            box.style.width = 600 + "px";
        }
    </script>
</body>
</html>