Deprecated. Not for use in new websites. See implementation notes. Uses a non-standard name. Has more compatibility info. 参见 文本格式化指南 RegExpHelp improve MDN Was this page helpful to you? YesNoLearn how to contribute. This page was last modified on 2024年7月28日 by MDN contributors...
String - JavaScript | MDN ①创建字符串 // var stringObject = new String('hello world') var stringValue = 'hello world' // 其每一个实例都有一个length属性 console.log(stringValue.length) // 11 1. 2. 3. ②字符方法 用于访问字符串中特点字符的方法: 1.charAt() console.log(stringValue.c...
1 Javascript: repeat a string in given a count parameter with a while loop 2 How to repeat a character using Javascript? 3 looping through a string and using repeat method 4 how can i repeat a string multiple times according to its index in a string 2 Returning a string that repea...
Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on iOS Samsung Internet WebView Android WebView on iOS Deno Node.js split Legend Tip: you can click/tap on a cell for more information. Full support Full support...
The MDN article also shows a polyfill. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith T.J. Crowder - Creating substrings isn't expensive on modern browsers; it may well have been in 2010 when this answer was posted. These days, the ...
The API is down for maintenance. You can continue to browse the MDN Web Docs, but MDN Plus and Search might not be available. Thank you for your patience! 面向开发者的 Web 技术 JavaScript JavaScript 参考 JavaScript 标准内置对象 String String.prototype.indexOf() 中文(简体) ...
Characters in a string are indexed from left to right. The index of the first character is 0, and the index of the last character in a string calledstringNameisstringName.length - 1. If theindexyou supply is out of range, JavaScript returns an empty string. ...
Implemented in JavaScript 1.2 ECMAScript 5.1 (ECMA-262) String.prototype.matchStandard ECMAScript 2015 (6th Edition, ECMA-262) String.prototype.matchStandard 浏览器兼容性 Desktop Mobile FeatureChromeFirefox (Gecko)Internet ExplorerOperaSafari Basic support(Yes)(Yes)(Yes)(Yes)(Yes) ...
【JavaScript】String 实例方法(一) 以下内容为学习记录,可以参考MDN原文。 环境 node v12.18.1 npm 6.14.5 vscode 1.46 Microsoft Edge 83 charAt charAt() 方法从一个字符串中返回指定的字符。 constsentence ='The quick brown fox jumps over the lazy dog.';constindex =4;console.log(`The character at...
String 的 lastIndexOf() 方法搜索该字符串并返回指定子字符串最后一次出现的索引。它可以接受一个可选的起始位置参数,并返回指定子字符串在小于或等于指定数字的索引中的最后一次出现的位置。