f3bdaa4e88
- 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.
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”