随笔分类 -  Promise

Promise相关API及及自定义实现
4-async与awita结合发送AJAX请求
摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta name="viewport" content 阅读全文
posted @ 2022-01-02 16:44 问某完红 阅读(92) 评论(0) 推荐(0)
3-async与await的结合实践
摘要：/** * 读取resource文件夹下个文件的内容: 1.html, 2.html, 3.html */ const fs = require("fs"); const util = require("util"); const mineReadFile = util.promisify(fs.r 阅读全文
posted @ 2022-01-02 16:43 问某完红 阅读(32) 评论(0) 推荐(0)
2-await表达式
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posted @ 2022-01-02 16:42 问某完红 阅读(47) 评论(0) 推荐(0)
1-async函数
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posted @ 2022-01-02 16:41 问某完红 阅读(31) 评论(0) 推荐(0)
7-如何中断Promise链
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posted @ 2022-01-02 16:39 问某完红 阅读(275) 评论(0) 推荐(0)
5-Promis中如何串联多个任务
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posted @ 2022-01-02 16:38 问某完红 阅读(36) 评论(0) 推荐(0)
6-Promise异常穿透现象是怎么回事
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posted @ 2022-01-02 16:38 问某完红 阅读(50) 评论(0) 推荐(0)
4-Promis中then方法的返回结果由什么决定
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posted @ 2022-01-02 16:36 问某完红 阅读(79) 评论(0) 推荐(0)
3-Promise改变状态与指定回调顺序的问题
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posted @ 2022-01-02 16:36 问某完红 阅读(107) 评论(0) 推荐(0)
2-当Promise对象成功或失败时能否执行多个回调
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posted @ 2022-01-02 16:35 问某完红 阅读(79) 评论(0) 推荐(0)
1-Promise的状态修改
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posted @ 2022-01-02 16:33 问某完红 阅读(121) 评论(0) 推荐(0)
自定义Promise
摘要：class Promise { // 构造方法 constructor(executor) { // resolve函数 里面还需要声明形参去接收实参 // 给实例对象的身上添加属性,直接通过this强行复制的方式去添加,这里的this就指的是新创建(new出来的)的实例对象 this.Promis 阅读全文
posted @ 2021-12-27 21:54 问某完红 阅读(85) 评论(0) 推荐(0)