chuck
/
es6-11study


			
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							<!DOCTYPE html>
<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>

        /**

         * 异步编程 文件操作 网络操作 数据库操作

         * 

         */

        // 定时器模拟 -- 回调地狱

        // setTimeout(()=>{

        //     console.log(111)

        //     setTimeout(()=>{

        //         console.log(222)

        //     },2000)

        // },1000)


        //1、 通过生成器函数

        function one(){

            setTimeout(()=>{

                console.log(111)

                iterator.next()

            },1000)

        }

        function two(){

            setTimeout(()=>{

                console.log(222)

                iterator.next()

            },2000)

        }

        function three(){

            setTimeout(()=>{

                console.log(333)

                iterator.next()

            },3000)

        }

        function * gen(){

            yield one()

            yield two()

            yield three()

        }

        //调用

        let iterator = gen()

        iterator.next()


        //2、获取用户数据 获取订单数据 获取商品数据

        function getUsers(){

            setTimeout(()=>{

                let data = 'user data'

                //调用next方法 传入数据

                iterator1.next(data)

            },1000)

        }

        function getOrders(users){

            setTimeout(()=>{

                let data = 'order data'

                iterator1.next(data)

            },1000)

        }

        function getGoods(orders){

            setTimeout(()=>{

                let data = 'good data'

                iterator1.next(data)

            },1000)

        }

        function * gen1(){

            let users = yield getUsers();

            console.log(users)

            let orders = yield getOrders(users);

            console.log(orders)

            let goods = yield getGoods(orders);

            console.log(goods)

        }

        let iterator1 = gen1()

        iterator1.next()

        
    </script>
</body>
</html>