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front-end-example/04-dom-events-async/07-timers-and-async-order/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 7：setTimeout 和异步顺序

目标

理解同步代码和异步回调的执行先后顺序。

你要练什么

  • setTimeout
  • 同步顺序
  • 异步回调
  • DOM 日志输出

任务

  • 点击按钮后先输出“开始执行”
  • 再立刻输出“同步代码结束”
  • 然后延迟输出“异步回调完成”

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