【MDN学习】JavaScript 之 Promise JavaScript Pomise API 学习 Promise.xx 表示类方法 Promise.prototype.xxx 表示实例方法 一、Promise 构造函数 语法:new Promise(executor) executor 参数 接收双参数(resolve, reject), resolve 和 reject 分别是执行成功 与 失败的函数 Promise 接收立即执行,一般用来处理异步操作 运...
MDN 官方 Web APIs 参考文档 :https://developer.mozilla.org/zh-CN/docs/Web/API 5、常见的 Web APIs 功能 常见的 Web APIs 功能 : DOM :操作网页内容 , 如 : 对元素进行增删改查、修改元素样式 等 ; BOM :操作浏览器功能 , 如 : 弹出新窗口、获取浏览器信息 等 ; Fetch :通过 HTTP 请求访问网络...
传给waitUntil()的 promise 会阻塞其他的事件,直到它完成,因此你可以放心,当你在新的 service worker 中得到你的第一个fetch事件时,你的清理操作已经完成。 js constdeleteCache=async(key)=>{awaitcaches.delete(key);};constdeleteOldCaches=async()=>{constcacheKeepList=["v2"];constkeyList=awaitcaches.ke...
Creates a deferred fetch, which is sent once the page is navigated away from (it is destroyed or enters the bfcache), or after a provided activateAfter timeout — whichever comes first. Window.find() Non-standard Searches for a given string in a window. Window.focus() Sets focus on th...
BabelJS 库 Web API简介 实用代码,解析json: 1 var requestURL = 'https://mdn.github.io/learning-area/javascript/oojs/json/superheroes.json'; 2 var request = new XMLHttpRequest(); 3 request.open('GET', requestURL); 4 request.responseType = 'json'; 5 request.send(); 6 7 request.onloa...
learning learning-js mdn-docs learning-to-code Updated Apr 4, 2025 HTML mdn / dom-examples Star 3.7k Code Issues Pull requests Code examples that accompany various MDN DOM and Web API documentation pages javascript demo drag-drop dom-manipulation touch-events matchmedia mdn-docs pointer-loc...
MDN URL: https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/api/fetch_api/using_fetch/index.md Last commit: bd4e1b0 Document last modified: 2025-02-09T22:21:09.000Z Activity NewUserHaadded needs...
Specifications configconfigmediaKeySystemAccessnavigatorconfigmediaKeysmediaKeySystemAccessmediaStatusmediaKeysmediaStatusmediaStatusconsole}else{log("HDCP 2.2 cannot be enforced");// Fallback other content, get license, etc.}}catch(error){log(error);}}...
nodejs.org/en/blog/rele Node v16.15.0 (LTS) 发布,也实验性支持了 v18 才有的 Fetch API,可以通过 --experimental-fetch 参数打开启用。 好文推荐 JavaScript 框架的四个时代 pzuraq.com/blog/four-er JavaScript 框架的四个时代,作者试图将 JavaScript 框架的历史分解为四个时代 远古时代 第一个框架诞生 ...
The HTML element is used to embed executable code or data; this is typically used to embed or refer to JavaScript code. The element can also be used with other languages, such as WebGL's GLSL shader programming language and JSON.