// 探索作用域this,箭头函数域普通函数的区别
// 箭头函数的定义是保证函数里的this是是定义域的this,
// 如果调用他的对象没有该函数,依旧会报undefined is not a Function
function scopeOfFuns(){
console.log("out fun:",this);
function scopeOfFunIn(){
console.log("in funs:",this)
}
scopeOfFunIn();
}
const scopeOfArrowFuns = () => {
console.log("arrow fun out:",this);
const scopeOfArrowFunsIn = () => {
console.log("arrow fun in",this);
}
scopeOfArrowFunsIn();
}
const scopeOfArrowFuns1 = () => {
console.log("arrow fun out:",this);
function scopeOfArrowFunsIn(){
console.log("arrow fun in",this);
}
scopeOfArrowFunsIn();
}
function scopeOfFuns1(){
console.log("out fun:",this);
const scopeOfFunIn = () => {
console.log("in funs:",this)
}
scopeOfFunIn();
}
function funTest() {
const scopeOfFunIn = () => {
console.log("in funs:",this)
}
let obj = {name:'tabqq'}
function scopeOfFuns1(){
console.log("out fun:",this);
this.scopeOfFunIn();
}
scopeOfFuns1.call(obj);
}
let arr = {
'hello':'so'
}
this.scopeOfFuns.apply(arr);
this.scopeOfArrowFuns.appy(arr)