es6入门（二）

4、模板字符串
模板字符串相当于加强版的字符串，用反引号 `,除了作为普通字符串，还可以用来定义多行字符串，还可以在字符串中加入变量和表达式。

// 1、多行字符串
let string1 =  `Hey,
can you stop angry now?`
console.log(string1)
// Hey,
// can you stop angry now?

// 2、字符串插入变量和表达式。变量名写在 ${} 中，${} 中可以放入 JavaScript 表达式。
let name = "Mike"
let age = 27
let info = `My Name is ${name},I am ${age+1} years old next year.`
console.log(info)
// My Name is Mike,I am 28 years old next year.

// 3、字符串中调用函数
function f(){
    return "have fun!"
}
let string2 = `Game start,${f()}`
console.log(string2);  // Game start,have fun!

5、声明对象简写

const age = 12
const name = "Amy"

// 传统
const person1 = {age: age, name: name}
console.log(person1)

// ES6
const person2 = {age, name}
console.log(person2) //{age: 12, name: "Amy"}

6、定义方法简写

// 传统
const person1 = {
    sayHi:function(){
        console.log("Hi")
    }
}
person1.sayHi();//"Hi"


// ES6
const person2 = {
    sayHi(){
        console.log("Hi")
    }
}
person2.sayHi()  //"Hi"