在任意两个字母之间断行 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
  <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 元素在任意两个字母之间断行：</p>
  <div id="myDIV">Thiscouldbeaninsainlylargeword</div>
  <button onclick="myFunction()">尝试一下</button>
  <script>
    function myFunction() {
      document.getElementById("myDIV").style.wordBreak = "break-all";
    }
  </script>

</body>
</html>
        