d0d8be443b
- Introduced Vue3 exercises covering composable API, reactivity, lifecycle hooks, and built-in components. - Added structured interview plan for frontend candidates focusing on HTML, CSS, JavaScript, TypeScript, and Vue. - Included starter files for each exercise and detailed README documentation for guidance.
练习 4：生命周期和模板 ref
目标
学会在组合式 API 里使用生命周期钩子，并通过模板 ref 获取 DOM。
你要练什么
onMountedonUpdatedonUnmounted- 模板
ref
任务
- 页面挂载后自动聚焦输入框
- 数据更新后输出日志
- 页面卸载前清理定时器