为了更方便的学习es6,需要引用babel
<script src="https://cdn.bootcss.com/babel-standalone/6.22.1/babel.min.js"></script>
1.解构赋值
代码语言：javascript复制function breakfast() {
return ['蛋糕','奶茶','苹果'];
}
let [des,drink,fruit] = breakfast();
console.log(des,drink,fruit);//返回的是 蛋糕 奶茶 苹果 2.解构对象
代码语言：javascript复制function breakfast1() {
return {desser:'蛋糕',tea:'奶茶',fruit:'苹果'};
}
let {desser=desser,tea=tea,fruit=fruit} = breakfast1();
console.log(desser,tea,fruit);//返回的是 蛋糕 奶茶 苹果 3.模板字符串
代码语言：javascript复制let dessert = '包子',
drink = '豆浆';
let breakfast = `今天的早餐是${dessert}和${drink}`;
console.log(breakfast); 4.带标签的模板字符串Tagged Templates
代码语言：javascript复制 let dessert = '包子',
drink = '豆浆';
let breakfast = kitchen`今天的早餐是 n
${dessert}和${drink}`;
function kitchen(strings,...values) {
console.log(strings);
console.log(values);
let result = "";
for (var i = 0; i<values.length; i ){
result = strings[i];
result = values[i];
}
result = strings[strings.length -1];
return result;
}
console.log(breakfast)5.判断字符串是否包含其他字符串
代码语言：javascript复制 let dessert = '包子',
drink = '豆浆';
let breakfast = `今天的早餐是 n
${dessert}和${drink}!`;
console.log( breakfast.startsWith("今天") ); //是否以什么开头
console.log( breakfast.endsWith("!") ); //是否以什么结束
console.log( breakfast.includes("早餐") ); //是否包含什么6.默认参数 - Default Parameter Values
代码语言：javascript复制 function breakfast(dessert = 'cake',drink = 'tea') {
return `${dessert}和${drink}`
}
console.log(breakfast())//返回的是 cake和tea
console.log(breakfast('bread','milk')) //返回的是bread和milk7.展开操作符-Spread …点点点
代码语言：javascript复制 let fruits = ['apple','banana'],
foods = ['cake',...fruits];
console.log(fruits) //返回["apple", "banana"]
console.log(...fruits) //返回apple banana
console.log(foods) //返回["cake", "apple", "banana"]
console.log(...foods) //返回cake apple banana8.剩余符号操作符Rest …
代码语言：javascript复制 function breakfast(dessert,drink,...foods) {
console.log(dessert,drink,foods);
}
breakfast('cake','tea','apple','banana') //返回的是 cake tea ["apple", "banana"]
function breakfast2(dessert,drink,...foods) {
console.log(dessert,drink,...foods);
}
breakfast2('cake','tea','apple','banana') //返回的是 cake tea apple banana9.解构参数 - Destructured Parameters
代码语言：javascript复制 function breakfast(dessert,drink,{location,restaurant} = {}) {
console.log(dessert,drink,location,restaurant);
}
breakfast('cake','milk',{location:'青岛',restaurant:'罗先生'})10.函数的名字-name属性
代码语言：javascript复制 let breakfast1 = function () {}
console.log(breakfast1.name) //返回的是breakfast1
let breakfast2 = function superMilk() { }
console.log(breakfast2.name) //返回的是superMilk11.箭头函数-Arrow Fuctions
代码语言：javascript复制 const breakfast1 = dessert => dessert;
// 翻译成es5:
// function breakfast1(dessert) {
// return dessert;
// }
let breakfast2 = (dessert,drink) => {
return dessert drink
};
// 翻译成es5:
// function breakfast2(dessert, drink) {
// return dessert drink;
// }12.对象表达式
代码语言：javascript复制 let dessert = 'cake',drink = 'tea';
let food = {
dessert,
drink,
breakfast(){}
}
console.log(food)13.对象属性名,向里面添加数据用 . 和[’’]
代码语言：javascript复制 let food ={};
food.dessert = 'cake';
food['hot drink']= 'tea';
console.log(food)14.对比两个值是否相等-Object.is()
代码语言：javascript复制 Object.is( 0,-0); //判断正零和负零是否相等15.把对象的值复制到另一个对象里 - Object.assign()
代码语言：javascript复制 let breakfast = {};
let food = {drink:'tea',dessert:'cake'};
Object.assign(
breakfast,
food
);
console.log(breakfast) //返回{drink:'tea',dessert:'cake'}16.设置对象的 prototype - Object.setPrototypeOf() 可以创建对象后再改变对象
代码语言：javascript复制 let breakfast = {
getDrink(){
return 'tea';
}
};
let dinner = {
getDrink(){
return 'milk'
}
};
let sunday = Object.create(breakfast);
console.log(sunday.getDrink()); //返回 tea
console.log(Object.getPrototypeOf(sunday) === breakfast); //返回 true17.proto 前后两个下划线
代码语言：javascript复制 let breakfast = {
getDrink(){
return 'tea';
}
};
let dinner = {
getDrink(){
return 'milk'
}
};
let sunday = {
__proto__: breakfast
}
console.log(sunday.getDrink()); //返回tea
sunday.__proto__ = dinner;
console.log(sunday.getDrink()); //返回milk18.super
代码语言：javascript复制 let breakfast = {
getDrink(){
return 'tea';
}
};
let dinner = {
getDrink(){
return 'milk';
}
};
let sunday = {
__proto__: breakfast,
getDrink(){
return super.getDrink() 'water'
}
};
console.log(sunday.getDrink())19.迭代器 - Iterators 轮流交换的意思
代码语言：javascript复制 function chef(foods) {
let i = 0;
return {
next(){
let done = (i< foods.length);
console.log(i)
let value = done ? foods[i ] : undefined;
return{
value: value,
done: done
}
}
}
}
let thunder = chef(['apple','ege']);
console.log(thunder.next()) //返回{value: "apple", done: true}
console.log(thunder.next()) //返回{value: "ege", done: true}
console.log(thunder.next()) //返回{value: undefined, done: false}20.生成器 - Generators
代码语言：javascript复制 function* chef() {
yield 'apple';
yield 'ega';
}
let thunder = chef();
console.log(thunder.next());
console.log(thunder.next());21.Class - 类
代码语言：javascript复制 class Chef {
constructor(food){
this.food = food;
}
cook(){
console.log(this)
console.log(this.food); //返回的是 apple
}
}
let thunder = new Chef('apple');
thunder.cook()22.get 得到 与 set 集
代码语言：javascript复制 class Chef {
constructor(food){
this.food = food;
this.dish = [];
}
get menu(){
return this.dish;
}
set menu(dish){
this.dish.push(dish);
}
cook(){
console.log(this.food);
}
}
let thunder = new Chef();
console.log(thunder.menu = "apple") //返回apple
console.log(thunder.menu = "tea") //返回tea
console.log(thunder.menu) //返回["apple", "tea"]23.静态方法-staitc
代码语言：javascript复制 class Chef {
constructor(food){
this.food = food;
this.dish = [];
}
get menu(){
return this.dish;
}
set menu(dish){
this.dish.push(dish);
}
static cook(food){
console.log(food); //返回的是 banana
}
}
Chef.cook('banana');24.继承-extends
代码语言：javascript复制 class Person{
constructor(name,birthday) {
this.name = name;
this.birthday = birthday;
}
intro(){
return `${this.name},出生日期在：${this.birthday}`
}
}
class Chef extends Person {
constructor(name,birthday){
super(name,birthday);
}
}
let thunder = new Chef('thunder','1996-03-19');
console.log(thunder.intro());25.set 一堆东西的集合
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26.Map
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27.Module 模块
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