嵌入网页片段（html）

```garden html
title: 字符长度与预计阅读耗时小工具
height: 156
code: |
  <!doctype html>
  <html lang="zh-CN">
  <head><meta charset="utf-8" /></head>
  <body>
    <input id="txt" value="把文章放在自己的 Git 仓库里，推送后自动构建。" />
    <div>当前字符数：<strong id="count">23</strong> 字</div>
    <script>
      const input = document.getElementById("txt");
      const count = document.getElementById("count");
      input.addEventListener("input", () => { count.textContent = String(input.value.length); });
    </script>
  </body>
  </html>
```