js提升篇小案例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>test2</title>
<script>
function one() {
y=document.getElementById("box");
y.style.background="pink";
y.style.borderRadius='50%';
y.innerHTML='添加的内容'
}
</script>
</head>
<body>
<div id="box" style="width: 150px;height: 150px;background: lightgreen"></div>
<button onclick="one(this)">change</button>
</body>
</html>