let count = 10;
let countObj = {
count: 1,
add() {
function setCount1() {
console.log(this); //window
console.log(this.count); //undefined
}
let setCount2 = () => {
console.log(this); //countObj
console.log(this.count); //1
}
setCount1();
setCount2();
}
}
countObj.add();
```
案例--let、箭头函数
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转载自blog.csdn.net/weixin_44462907/article/details/88573114
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