附加参考页面 类 JavaScript 类。 constructor extends 私有属性 公有类字段 static 静态初始化块
<param>Defines parameters for an<object>element. <plaintext>Renders everything following the start tag as raw text, ignoring any following HTML. There is no closing tag, since everything after it is considered raw text. <rb>Used to delimit the base text component of a ruby annotation, i....
constnullVar=null;nullVar.toString();// TypeError: nullVar is nullString(nullVar);// "null"constundefinedVar=undefined;undefinedVar.toString();// TypeError: undefinedVar is undefinedString(undefinedVar);// "undefined" Specification ECMAScript Language Specification ...
In this case, "host" refers to the application that is hosting (or: embedding) the ECMAScript engine and providing the runtime. Another usage example from MDN is this paragraph from JavaScript technologies overview: JavaScript engines expose a public API which application developers can use...
为了方便学习,我将最核心的部分的目录截取出来(包括html,css,javascript) 由于MDN的网站设计不是很好 目录导航和主要内容同时滚动,不便于独立使用目录导航(这一点很不现代化,大多数教程网站都具备目录导航独立滚动而不影响主内容) 面包屑导航不够清晰(中间路径缺失)(侧边的目录导航被折叠,不便于定位当前按文章所处进...
MDN Web Docs is an open-source, collaborative project that documents web technologies including CSS, HTML, JavaScript, and Web APIs. Alongside detailed reference documentation, we provide extensive learning resources for students and beginners getting started with web development. MDN's mission MDN's ...
The <tr> HTML element defines a row of cells in a table. The row's cells can then be established using a mix of <td> (data cell) and <th> (header cell) elements.
innerHTML 1 Toggle history 12 Toggle history 1 Toggle history 8 Toggle history 1 Toggle history 18 Toggle history 4 Toggle history 10.1 Toggle history 1 Toggle history 1.0 Toggle history 1 Toggle history Legend Tip: you can click/tap on a cell for more information. ...
js对象 数组Array详解 (参照MDN官网:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find) 一:数组的创建方式: 1、采用直接量创建 var arr = [];//创建一个空数组 var arr2 = [1,2,3];//创建一个有三个元素的数组...
A function that sometimes returns a clone and sometimes returns a reference makes it harder to debug, and is most likely considered an antipattern. Since there is no standard for indicating whether a returned array is mutable in JavaScript, MDN most likely considered it is better to be safe ...