es6 迭代器-symbol.iterator
阿新 • • 發佈：2021-06-21
迭代器-symbol.iterator
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>迭代器-symbol.iterator</title>
</head>
<body>
<div id="ad">
</div>
<div></div>
<script>
const school = {
name: "清華大學",
student:[
"小明",
"小剛"
],
[Symbol.iterator](){
let _this = this;
let index = 0;
return {
next(){
if(index < _this.student.length){
const result = {value:_this.student[index],done:false};
index++;
return result;
}else{
return {value:undefined, done:true}
}
}
}
}
};
console.log('test');
for(let i of school){
console.log(i);
}
</script>
</body>
</html>