<html>
<head>
<style>
#myDIV
{
width:150px;
height:100px;
background-color:lightblue;
border:1px solid black;
}
</style>
</head>
<body>
<p>点击“尝试一下”按钮。让 DIV 元素中的长单词换行到下一行：</p>
<div id="myDIV">Thiscouldbeaninsainlylargeword</div>
<button onclick="myFunction()">尝试一下</button>
<script>
function myFunction()
{
document.getElementById("myDIV").style.wordWrap = "break-word";
}
</script>
</body>
</html>