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README.md

练习 2：修改文本、类名和样式

目标

学会改元素内容、切换类名和设置简单样式。

你要练什么

  • textContent
  • classList.add
  • classList.remove
  • style

任务

  • 把标题改成“今天已完成 DOM 练习”
  • 给状态标签加上完成样式
  • 修改说明文字颜色

文件