<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[jing1da的博客]]></title><description><![CDATA[初级者的随便写写]]></description><link>https://blog.youkuaiyun.com/jing1da</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; jing1da]]></copyright><item><title><![CDATA[JavaScript创建对象的多个方法]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/124790067</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/124790067</guid><author>jing1da</author><pubDate>Sun, 15 May 2022 23:04:06 +0800</pubDate><description><![CDATA[1.



2.对象字面量



3.工厂模板



false，mlt1与createMLT没有关联



4.构造函数来创建对象





5.Object.create()





6.用class；
















]]></description><category></category></item><item><title><![CDATA[简单了解JavaScript中的普通函数和箭头函数的区别]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/124787911</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/124787911</guid><author>jing1da</author><pubDate>Sun, 15 May 2022 20:54:42 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[JavaScript new一个对象的过程；]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/124787192</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/124787192</guid><author>jing1da</author><pubDate>Sun, 15 May 2022 20:14:08 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[JavaScript运算符typeof和instanceof的区别]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/124785081</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/124785081</guid><author>jing1da</author><pubDate>Sun, 15 May 2022 17:51:58 +0800</pubDate><description><![CDATA[typeof检测数据类型

会返回一个小写字母的类型字符串


typeof undefined; 
//"undefied"

typeof true; 
//"boolean"

typeof false; 
//"boolean"

typeof 123; 
//"number"

typeof 6.666; 
//"number"

typeof NaN;
//"number"

typeof "hello";
//"string"






hello = function(){};
typ..]]></description><category></category></item><item><title><![CDATA[简单js中的了解微任务和宏任务]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/124784503</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/124784503</guid><author>jing1da</author><pubDate>Sun, 15 May 2022 17:25:37 +0800</pubDate><description><![CDATA[因为JavaScript是单线程的，也就是只有一个调用栈，调用栈按照先入后出的规则进行，一次调用一个，而且可以嵌套，在执行调用栈的时候会先执行同步的任务。

    调用栈在发现异步任务的时候会把异步任务放入队列里面，异步任务队列分为宏任务队列和微任务队列，队列都按照先入先出的规则。

宏任务：

1.新程序或子程序被直接执行。（最常见就是&lt;script&gt;元素里面运行的代码就是程序被执行）

2.事件的回调函数。

3.setTimeout()和setInterval...]]></description><category></category></item><item><title><![CDATA[简单了解什么是跨域？跨域怎么解决？]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/124769346</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/124769346</guid><author>jing1da</author><pubDate>Sat, 14 May 2022 15:54:41 +0800</pubDate><description><![CDATA[什么是跨域？

跨域，指的是浏览器不能执行其他网站的脚本。它是由浏览器的同源策略造成的，是浏览器施加的安全限制。

所谓同源是指，域名，协议，端口均相同，不明白没关系，举个栗子：

http://www.123.com/index.html 调用 http://www.123.com/server.php （非跨域）

http://www.123.com/index.html 调用 http://www.456.com/server.php （主域名不同:123/456，跨域）

http://abc.1]]></description><category></category></item><item><title><![CDATA[简单了解async await]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/124765660</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/124765660</guid><author>jing1da</author><pubDate>Sat, 14 May 2022 11:32:34 +0800</pubDate><description><![CDATA[async function bb(){
    return new Promise.resolve('别bb,专心学习');
}

bb()
    .then( value =&gt; {
     console.log(value)   
}) //输出别bb,专心学习;

async函数一定会返回一个promise对象 固可以用.then()来处理返回的promise对象；




async function bb(){
    console.log('1');
    let two =.]]></description><category></category></item><item><title><![CDATA[简单了解js中的Promise]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/124762204</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/124762204</guid><author>jing1da</author><pubDate>Sat, 14 May 2022 00:05:01 +0800</pubDate><description><![CDATA[const isPregnant = true;

const promise = new Promise( ( resolve , reject ) =&gt; { 
        if ( isPregnant ){
            resolve('孩子他爹');
        } else {
            reject('Husband');
        }

})

promise
    .then( name =&gt; { 
        console.lo.]]></description><category></category></item><item><title><![CDATA[Vue全家桶+element做一个小型电子书分享网站]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/121893513</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/121893513</guid><author>jing1da</author><pubDate>Sun, 12 Dec 2021 21:06:48 +0800</pubDate><description><![CDATA[功能都是能实现的

后台管理仅限管理员登录 设置了全局前置路由守卫 控制权限进入（登录后才能登录）

图书详情页中的Download点击后会在网页中的下载里弹出并自动下载

需要源码可以私信我






















...]]></description><category></category></item><item><title><![CDATA[图片分享1]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/121057406</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/121057406</guid><author>jing1da</author><pubDate>Sat, 30 Oct 2021 21:59:01 +0800</pubDate><description><![CDATA[搜索框和位置


]]></description><category></category></item><item><title><![CDATA[2021-04-23]]></title><link>https://blog.youkuaiyun.com/jing1da/article/details/116052302</link><guid>https://blog.youkuaiyun.com/jing1da/article/details/116052302</guid><author>jing1da</author><pubDate>Fri, 23 Apr 2021 13:30:54 +0800</pubDate><description><![CDATA[c#实验二

三、设计一个银行账号类，其中包括：

Private数据域表示账户信息，包括账号、姓名、开户时间、身份证号码；

Public方法，包括开户、存款、取款、查询余额。


using System;

namespace _422B
{
    public class Bank
    {
        private String name;
        private double money;
        private int IDcard;
        private ]]></description><category></category></item></channel></rss>