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front-end-example/03-javascript-core/12-this-keyword/README.md
charlie 877acb5a8f feat: Add JavaScript core exercises and solutions
- Implemented exercises for array high-order methods, memory and execution, switch statements, and final review.
- Added starter and answer files for each exercise to facilitate learning.
- Created a runner HTML file to execute JavaScript code and display console outputs.
- Updated README files to include exercise objectives, tasks, and usage instructions.
2026-03-13 11:09:19 +08:00

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# 练习 12this
## 目标
理解 `this` 会随着调用方式不同而变化。
## 你要练什么
- 对象方法调用
- 普通函数调用
- 箭头函数继承外层 `this`
- `this` 指向
## 任务
请完成一个“学习者对象”脚本,要求:
- 创建一个带 `name``stage` 的对象
- 写一个对象方法,方法内部用 `this.name`
- 取出这个方法单独调用,观察 `this` 变化
- 再写一个返回箭头函数的方法,观察箭头函数为什么还能拿到对象的 `this`
- 输出 3 种调用结果
## 文件
- [starter.js](/Users/lijiaqing/home/wwwroot/front-end-example/03-javascript-core/12-this-keyword/starter.js)
- [answer.js](/Users/lijiaqing/home/wwwroot/front-end-example/03-javascript-core/12-this-keyword/answer.js)