What are 7 practical tips about ES6?

This article shares 7 practical skills of es6 with you. It is very good and has reference value. Friends who are interested can learn together

Hack #1 Exchange elements

Use array destructuring to achieve value exchange

let a = 'world', b = 'hello'
[a, b] = [b, a]
console.log(a) // -> hello
console.log(b) // -> world

Hack #2 Debugging

We often use console.log() for debugging, try console .table() doesn’t hurt either.

const a = 5, b = 6, c = 7
console.log({ a, b, c });
console.table({a, b, c, m: {name: 'xixi', age: 27}});

Hack #3 Single statement

In the ES6 era, statements that operate on arrays will be more compact

// 寻找数组中的最大值
const max = (arr) => Math.max(...arr);
max([123, 321, 32]) // outputs: 321
// 计算数组的总和
const sum = (arr) => arr.reduce((a, b) => (a + b), 0)
sum([1, 2, 3, 4]) // output: 10

Hack #4 Array Splicing

The expansion operator can replace concat

const one = ['a', 'b', 'c']
const two = ['d', 'e', 'f']
const three = ['g', 'h', 'i']
const result = [...one, ...two, ...three]

Hack #5 Making a copy

We can easily implement arrays and a shallow copy of the object

const obj = { ...oldObj }
const arr = [ ...oldArr ]

Hack #6 Named parameters

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