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Js matchall matchAll() is different from match () because it returns every match, not just the first. matchall`. The matchAll() method returns an iterator of all results matching a string against a regular expression, including capturing groups. Here is word1 and here is word2, which may or may not exist. js (12+) are supported but not IE, Safari, and Opera. Jul 21, 2025 · Regular expressions are patterns used to match character combinations in strings. . org/en-US/docs/Web/JavaScript/Reference/… Feb 2, 2019 · String. We are finally beginning to see a built-in matchAll function, see here for the description and compatibility table. Returned results depend a lot on using the global (g) flag. It allows developers to find all matches of a pattern in a string, returning an iterator with detailed match results. Chrome 73 introduces the String. Sep 19, 2019 · I want String. Jun 23, 2025 · The matchAll() method of the Clients interface returns a Promise for a list of service worker Client objects. match () is a method in JavaScript that returns an array of results matching a string against a regular expression. See syntax, parameters, return value, exceptions, examples, and browser compatibility. See syntax, parameters, return value, and examples of case sensitive and insensitive regex. Feb 2, 2024 · Use String. Otherwise, it returns true. String. The match() method returns null if no match is found. To make that happen we use indexOf which is returning the position of the matching string May 26, 2021 · That's where String. match(regExp); Parameters: string: The . The first parameter, str, is the string to search. If a g flag is used we will get all results but without capturing groups. matchAll method, which returns an iterator. matchAll() String. Jan 13, 2025 · 在 JavaScript 的新版标准 ES12 中，新增了一个 matchAll 方法，它可以让我们更加方便地处理字符串匹配的问题。本篇文章将详细讲解 matchAll 方法的使用方法、注意事项以及其在实际开发中的应用，希望能为大家带来一些帮助。 I wanted to write a regex to count the number of spaces/tabs/newline in a chunk of text. MatchAll, like its small brother match, is a method available on string that will take a regex as an argument: const testString = 'this hat is better than that hat. matchAll should behave. matchAll() to Match Multiple Occurrences With Regex in JavaScript The matchAll() function gives an iterator of all results matching a string against a regular expression. matchAll() returns an iterator that returns all matched groups against a regular expression, including capturing groups. Seems like it was drafted in December 2018 so give it some time to reach all browsers, but I trust it will get there. Sep 1, 2021 · 1) matchAll will return an Iterator object Iterator [RegExp String Iterator] result will contain an Iterator and when you use the spread operator It will give you all matches. matchAll static data property represents the well-known symbol Symbol. matchAll() method to be working in edge browser as well. matchall" npmjs package I have installed this package and imported in m How do I make an expression to match absolutely anything (including whitespaces)? Example: Regex: I bought _____ sheep. It is often used when you need to find particular patterns within strings, enabling efficient text processing. So thought of using the "string. Javascript String matchAll () In this tutorial , we will learn about the JavaScript String matchAll () method with the help of examples. matchAll is supported in Node. Jul 8, 2025 · The JavaScript exception "TypeError: matchAll/replaceAll must be called with a global RegExp" occurs when the String. Matches: I bought sheep. The matchAll() method of String values returns an iterator of all results matching this string against a regular expression, including capturing groups. Whether you‘re just getting started with JavaScript or have been coding for years, understanding regexes will make you a more efficient and capable programmer. Regular expression tester with syntax highlighting, PHP / PCRE & JS Support, contextual help, cheat sheet, reference, and searchable community patterns. It works similar to Regular Expression. matchAll(regexp). 0 Check out the compatibility on MDN. This method returns an array of matched substrings or null if no match is found. matchAll() comes into play. Apr 15, 2019 · #String. Nov 6, 2018 · I have seen this link but my question is different. Nov 24, 2021 · matchall is not function or its return value is not iterable Maybe my browser or js version not supported. Can so Is there a way to retrieve the (starting) character positions inside a string of the results of a regex match() in Javascript? Sep 28, 2025 · The every() method of Array instances returns false if it finds one element in the array that does not satisfy the provided testing function. I tried these: (word1). for more information about regexes. mozilla. matchAll () or String. javascript regex match all occurrences of substring? match() function in JS can be used to match a substring in a string. replace (str|regexp, str|func) This is a generic method for searching and replacing, one of most useful ones. NET. Description The matchAll() method matches a string against a regular expression ** The matchAll() method returns an array with the matches. js. If we need positions of further matches, we should use other means, such as finding them all with str. The built-in matchAll function is nice because matchAll() 方法返回一个迭代器，该迭代器包含了检索字符串与正则表达式进行匹配的所有结果（包括捕获组）。 28 String#matchAll (see the Stage 3 Draft / December 7, 2018 proposal), simplifies acccess to all groups in the match object (mind that Group 0 is the whole match, while further groups correspond to the capturing groups in the pattern): With matchAll available, you can avoid the while loop and exec with /g JavaScript String matchAll () The matchAll() method returns an iterator containing the results of matching a string against a string (or a regular expression). matchAll is now well supported in modern browsers as well as Node. but which alternative i have for matchAll for lower versions? Feb 6, 2009 · So, rather than writing complicated parsing functions, remember that the "matchAll" function in JavaScript is simply "replace" with a replacement handler function, and much pattern matching efficiency can be had. matchAll() method looks up this symbol on its first argument for the method that returns an iterator, that yields matches of the current object against a string. Jul 11, 2025 · The match () method in JavaScript is used for identifying and retrieving substrings that fit a specified pattern, defined by a regular expression. Just like match, it looks for matches, but there are 3 differences: It returns not an array, but an iterable object. Syntax: string. Dec 3, 2020 · 关于正则编写的细节这里不多做赘述，本文主要是列出 exec 、 match 、 matchAll 、 test 这几个函数之间的区别。 详细的正则表达式文档参照 正则表达式 - JavaScript | MDN Jul 8, 2025 · Groups group multiple patterns as a whole, and capturing groups provide extra submatch information when using a regular expression pattern to match against a string. matchall in your project by running `npm i string. ) hat/g; JavaScript 中的正则表达式提供了强大的 字符串匹配 和处理能力，尤其通过 match() 和 matchAll() 两个方法，用户可以执行多种类型的匹配操作。以下是对 match() 和 matchAll() 的详细、全面的讲解。 一、 match() match() 方法用于在 字符串 中执行查找，返回第一个或全部匹配结果。根据是否使用全局标志 g，它 Jul 23, 2025 · In JavaScript, the regular expression (RegExp) object provides a powerful mechanism to search, match, and manipulate strings. matchAll () The matchAll () method of String values returns an iterator of all results matching this string against a regular expression, including capturing groups. Jul 10, 2025 · The match() method of String values retrieves the result of matching this string against a regular expression. The matchAll() method returns null if no match is found. Feb 12, 2021 · matchAll () is a new method added to String prototype. This chapter describes JavaScript regular expressions. Yep. js from version 12. I bought a sheep. 12 String. Learn how to use the matchAll() method to find all matches of a regular expression in a string. inside [] is different than other regex frameworks, particularly the advanced one in . Jun 22, 2025 · The matchAll() method is a built-in JavaScript function that returns an iterator of all matches of a regular expression within a string. matchAll. The JavaScript String matchAll () method retrieves an iterator of all the results that match a specified regular expression (regex) in the current string. Description The match() method matches a string against a regular expression ** The match() method returns an array with the matches. It provides detailed match results, including capturing groups and match indices. find() returns the first matching element, undefined if it finds nothing. If options are not included, the method returns only the service worker clients controlled by the service worker. Array. match () String. If you need more information on a specific topic, please follow the link on the corresponding heading to access the full article or head to the guide. Apr 12, 2020 · ES2020 contains a new String. The iterator returns all matches one after other. Apr 5, 2023 · The matchAll() method returns an iterator of all results matching a string against a regular expression, including capturing groups. 0. Dec 11, 2024 · Hello students! After teaching JavaScript for over 15 years, I want to share my deep knowledge on one of the most useful but often misunderstood topics – regular expressions (aka regex). So I naively wrote the following:- Jul 8, 2025 · Regular expression syntax cheat sheet This page provides an overall cheat sheet of all the capabilities of RegExp syntax by aggregating the content of the articles in the RegExp guide. It was added to JavaScript language long after match, as its “new and improved version”. It behaves similarly to match(), but offers a simple way to iterate over matches, especially when you need access to capture groups. Sep 21, 2024 · JavaScript通过多种方法可以获取正则表达式匹配的所有字符串，包括 match ()、exec ()、matchAll () 等。 其中，matchAll () 是最全面和现代的解决方案，适用于复杂匹配和提取操作。 Description The matchAll() method matches a string against a regular expression ** The matchAll() method returns an array with the matches. The swiss army knife for searching and replacing. matchAll() method. Check the compatibility (the RegExp exec method is much older, while matchAll requires a browser version “newer than Mid-ish 2019” or a polyfill): developer. […] Sep 13, 2018 · Two things: first, Array. prototype. I bought five sheep. I tried usi Dec 30, 2009 · I just want to add for posterity that JS regex syntax ignoring the meaning of . “MatchAll” to the rescue? Since both, match and exec have severe shortcomings, the new method matchAll was introduced. When the flag g is present, it returns every match as an array with Jun 4, 2021 · Basics of Javascript · String · matchAll () (method) This article is a transcript of my free youtube series about basics of web development. Nov 14, 2024 · The matchAll() method in JavaScript is a powerful tool for extracting all matches of a regular expression pattern from a string. matchAll makes it easy to iterate through all the match objects a given regular expression produces. These patterns are used with the exec() and test() methods of RegExp, and with the match(), matchAll(), replace(), replaceAll(), search(), and split() methods of String. Here is the case: I want to find the elements which match the regex targetText = "SomeT1extSomeT2extSomeT3extSomeT4extSomeT5extSomeT6ext" and I use the regex in String. 5w次，点赞6次，收藏13次。本文详细介绍了JavaScript中用于字符串匹配的两个方法：match ()和matchAll ()。match ()方法返回字符串与正则表达式的匹配结果，而matchAll ()则返回一个迭代器，包含所有匹配项及其分组捕获组。通过具体示例展示了这两种方法的使用方式及返回值。 May 8, 2015 · I'm trying to write this regEx (javascript) to match word1 and word2 (when it exists): This is a test. One of the common use cases is matching multiple parts of a string that satisfy a certain pattern. I'm sure I'm missing something dumb/obvious, but I don't see why it doesn't just return an array instead. In JavaScript, regular expressions are also objects. Jul 23, 2025 · The JavaScript matchAll method is very useful for working with regular expressions. Jul 10, 2025 · Learn how to use the matchAll() method to get an iterator of all matches of a regular expression in a string, with capturing groups. Backreferences refer to a previously captured group in the same regular expression. matchall. May 4, 2020 · String. There are 1010 other projects in the npm registry using string. This method returns an iterator of all the matches, including capturing groups, which is especially useful when working with complex pattern matching requirements in text processing. Jan 27, 2021 · 文章浏览阅读1. One of the main reasons for using matchAll() over match() is the abilitiy to access capture groups. Include the options parameter to return all service worker clients whose origin is the same as the associated service worker's origin. '; const regex = /th(. However, if the specified regular expression does not find any matches in the current string, it will return an empty iterator. The method returns an iterator. Jan 27, 2024 · To get them, we should search using the method str. str. When I run this code, Aug 21, 2022 · 四、结语啊哈 由于 matchAll 只能和正则表达式打交道，因此， matchAll 在 JS 代码中的传播和使用率一定是小于 replaceAll 的，因为正则表达式是很多开发人员的软肋，一知半解，能避则避。 这显然不是长久之计，正则表达式一定要认真学习，反复实践，要达到完全可以自己手写复杂正则表达式的境界才 Jul 13, 2022 · The important limitation: search only finds the first match. matchAll]() method of RegExp instances specifies how String. This can be used like so: Oct 11, 2025 · "Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers. filter returns a new array containing all matching elements, [] if it matches nothing. We can use it without regexps, to search and Start using string. The second parameter, regex, is a string with the regular expression to apply. matchAll() は String 値のメソッドで、この文字列と正規表現を照合したすべての結果を、キャプチャグループを含み、イテレーターで返すメソッドです。 The Symbol. *(word2)? See MDN. The String. Second thing, if you want to match 4,5, you have to look into the string instead of making a strict comparison. replaceAll () method is used with a RegExp object that does not have the global flag set. It provides a brief overview of each Sep 12, 2021 · javascript regex matchAll [closed] Asked 4 years, 2 months ago Modified 4 years, 1 month ago Viewed 3k times The [Symbol. It looks like as of May 2020, Chrome, Edge, Firefox, and Node.