常见的箭头函数及对应的普通函数
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<meta charset="UTF-8">
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<title>Document</title>
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<script type="text/javascript">
// var one = function(){
// return " I am one ";
// }
// 箭头函数
let one = () => ' I am one ';
console.log(one());
// var two = function(a){
// return a;
// }
//箭头函数
let two = a => a;
console.log(two(' I am two '));
// var three = function(b,c){
// return b + c;
// }
//箭头函数
let three = (b,c) => b + c;
console.log(three(1,3));
</script>
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