ES6-部分新特性

1.变量的解构赋值

 const array = ['11111','22222','33333','44444'];
        let [arr1,arr2,arr3,arr4] = array;

 const dic ={
            name:'jam',
            age:30,
            say:function(){
                console.log('我是个好人');
            }
        };

         let {name,age,say} = dic;

        let {say} = dic;

2.模板字符串

1.声明

   let str = `hello world`;

2.内容中可出现换行符

        let str1 =`
        <ul>
        <li>111</li>
        <li>222</li>
        </ul>
        `;

3.可拼接变量

        let test = '123';
        let str3 = `${test}456`;

3.对象的简化写法

 // ES6允许在大括号里 直接写入变量和函数，作为对象的属性和方法
        //  key value一致，省略key
        let name = 'hua';
        let study = function(){
            console.log('hello');
        }

        const school = {
            name,
            study,
            // improve:function(){
                improve(){
                console.log(1111);
            }
        }

4.rest参数

 // ES6 引入rest参数，用来获取函数的实参，代替arguments
        // ES5
        function date(){
            console.log(arguments);
        }
        date("1111","2222","3333")

        // ES6 rest参数  rest参数必须要放到参数最后
        function test(...args){
            console.log(args);//数组
        }
        test("1111","2222","3333")