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<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
// ES6新增的
// let 函数名 = (形参) => {
// js代码
// }
var sum1 = function (a, b) {
return a + b
}
/* const sum2 = (a, b) => {
return a + b
} */
const sum2 = (a, b) => a + b;
// console.log(sum1(1, 2));
// console.log(sum2(1, 2));
var add1 = function (n) {
return n + 2;
}
// const add2 = (n) => {
// return n + 2;
// }
const add2 = n => n + 2;
// console.log(add1(10));
// console.log(add2(10));
var arr = [1, 2, 3, 4];
var newArr1 = arr.map(function (v, i) {
// console.log(v, i);
return v * 100;
});
// const newArr2 = arr.map((v, i) => {
// // console.log(v, i);
// return v * 100;
// });
const newArr2 = arr.map(v => v * 100);
// console.log('newArr1', newArr1);
// console.log('newArr2', newArr2);
// setTimeout(function () {
// console.log(666);
// }, 1000);
setTimeout(() => console.log(8888), 2000);
</script>
</body>
</html>
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