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front-end-example/04-dom-events-async/04-click-counter/README.md
charlie f3bdaa4e88 feat: add TypeScript lessons and learning panel 
- Introduced a new script to check TypeScript lesson files for errors.
- Created a main TypeScript file to render lessons and their details.
- Added lesson definitions with starter and answer codes.
- Implemented a user interface for navigating and running lessons.
- Styled the application with CSS for a better user experience.
- Updated README to reflect the new TypeScript section and usage instructions.
2026-03-19 10:06:11 +08:00

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练习 4：点击计数器

目标

学会给按钮绑定点击事件，并更新页面数据。

你要练什么

  • addEventListener
  • 点击事件
  • 数字状态更新
  • DOM 渲染

任务

  • 点击加一按钮时计数加 1
  • 点击减一按钮时计数减 1
  • 点击重置按钮时恢复为 0

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