练习

2021-04-29 17:16:40 +08:00
parent 812be57880
commit 55c598cdb1
195 changed files with 12788 additions and 34 deletions
--- a/teaching/jwl/课件/es6/fuxi.html
+++ b/teaching/jwl/课件/es6/fuxi.html
@@ -0,0 +1,113 @@
+<!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>
+    <script>
+        // es6
+        // let const   
+        // 解构赋值
+        // async await 
+        // class
+        // model  模块化
+        // promise
+        // set map  weakset weakmap
+        // for foreach  for in   while   for of 
+        
+        // const set=new Set([1,2,3,3,3])
+        // for(let i in set){
+        //     console.log(i,set[i])
+        // }
+
+    </script>
+    <script>
+        const set=new Set([1,2,3,3,3])
+        // console.log(set[2])
+        for(let i of set){
+            console.log(i,set[i])
+            console.log(set)
+        }
+
+        function zhanshi(){
+            console.log(set,"lllk")
+            const price=0
+        }
+        zhanshi()
+        // console.log(price)
+
+        // 解构赋值
+        // 对象 解构赋值 原则上来说 我们需要让属性名等于变量名  
+        // 特殊情况 如果说 属性名不等于属性值得话
+        let {foo, baz}={foo:"aaa",bar:"bbb",baz:"ccc"}
+        // foo  aaaa
+        // baz  ccc
+        // let { foo: baz } = { foo: 'aaa', bar: 'bbb' };
+        console.log(foo, baz)
+
+        var promise=new Promise(function(resolve,reject){
+            console.log(1111)
+            resolve()
+        })
+        promise.then(()=>{
+            console.log("success")
+        })
+        console.log(2222)
+        console.log(1222223)
+        setTimeout(function(){
+            console.log("延迟后")
+        },1000)
+
+
+        // pro1.then(()=>{
+        //     pro2.then(()=>{
+        //         pro3.thne(()=>{
+        //             // .......
+        //         })
+        //     })
+        // })
+
+        // 用同步的样子去写异步的函数   -----async 函数（异步操作的一个方式）
+
+        // function getlist(){
+        //     http.get("/userlist").then((res)=>{
+        //         console.log(res)
+        //     })
+        // }
+
+        // async function getlist(){
+        //    let res=await http.get("/userlist")
+        //    console.log(res)
+        // }
+
+
+    // class
+    class Creator{
+        constructor(name){
+            this.name=name,
+            this.age=1
+        }
+        say(){
+            console.log(123)
+        }
+    }
+
+    // extends
+
+    class Creator2 extends Creator{
+
+    }
+    var obj=new Creator("A")
+    var obj1=new Creator("B")
+    console.log(obj)
+    console.log(obj1)
+
+    var xiaoming=new Creator2("小明")
+    console.log(xiaoming)
+    </script>
+</head>
+<body>
+    
+</body>
+</html>