id stringlengths 16 145 | text stringlengths 1 179k | title stringclasses 1
value |
|---|---|---|
Mmdn_RegExp/exec_120_0.txt | Specification
---
[ ECMAScript Language Specification
# sec-regexp.prototype.exec ](https://tc39.es/ecma262/multipage/text-
processing.html#sec-regexp.prototype.exec) | |
Mmdn_RegExp/Mmdn_RegExp_7_3.txt | xt)
* [ ` RegExp.rightContext ($') ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/rightContext)
* [ ` RegExp.$1, â¦, RegExp.$9 ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/n)
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Mmdn_RegExp/exec_38_0.txt | * [ JavaScript | |
Mmdn_RegExp/exec_51_0.txt | All browser compatibility updates at a glance | |
Mmdn_RegExp/Regularexpressions_218_0.txt | * [ Web Technologies ](/en-US/docs/Web)
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Mmdn_RegExp/exec_54_0.txt | Learn how to use MDN Plus | |
Mmdn_RegExp/Regularexpressions_93_0.txt | A regular expression pattern is composed of simple characters, such as ` /abc/
` , or a combination of simple and special characters, such as ` /ab*c/ ` or `
/Chapter (\d+)\.\d*/ ` . The last example includes parentheses, which are used
as a memory device. The match made with this part of the pattern is remembered
for ... | |
Mmdn_RegExp/exec_119_0.txt | ## Specifications | |
Mmdn_RegExp/exec_116_0.txt | You can also use ` exec() ` without creating a [ ` RegExp ` ](/en-
US/docs/Web/JavaScript/Reference/Global_Objects/RegExp) object explicitly: | |
Mmdn_RegExp/toString_87_0.txt | ### Using toString() | |
Mmdn_RegExp/Regularexpressions_86_0.txt | * Using a regular expression literal, which consists of a pattern enclosed between slashes, as follows: | |
Mmdn_RegExp/exec_144_0.txt | Visit [ Mozilla Corporationâs ](https://www.mozilla.org) not-for-profit
parent, the [ Mozilla Foundation ](https://foundation.mozilla.org/) .
Portions of this content are ©1998â 2024 by individual mozilla.org
contributors. Content available under [ a Creative Commons license ](/en-
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Mmdn_RegExp/Regularexpressions_1_0.txt | [ MDN Web Docs ](/en-US/) Open main menu | |
Mmdn_RegExp/toString_94_0.txt | new RegExp("\n").toString() === "/\\n/"; // true | |
Mmdn_RegExp/exec_121_0.txt | ## Browser compatibility | |
Mmdn_RegExp/Regularexpressions_43_0.txt | ](/en-US/docs/Web/Accessibility) | |
Mmdn_RegExp/toString_4_0.txt | ](/en-US/docs/Web) | |
Mmdn_RegExp/Regularexpressions_152_0.txt | To include a flag with the regular expression, use this syntax: | |
Mmdn_RegExp/Regularexpressions_115_0.txt | ` _x_ * ` , ` _x_ + ` , ` _x_ ? ` , ` _x_ { _n_ } ` , ` _x_ { _n_ ,} ` , ` _x_
{ _n_ , _m_ } ` | | |
Mmdn_RegExp/Mmdn_RegExp_10_0.txt | * Skip to main content
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* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_RegExp/Regularexpressions_9_0.txt | Code used to describe document style | |
Mmdn_RegExp/Regularexpressions_190_0.txt | form.addEventListener("submit", (event) => {
event.preventDefault();
testInfo(input);
}); | |
Mmdn_RegExp/toString_76_0.txt | ## Try it | |
Mmdn_RegExp/Regularexpressions_94_0.txt | **Note:** If you are already familiar with the forms of a regular expression,
you may also read [ the cheat sheet ](/en-
US/docs/Web/JavaScript/Guide/Regular_expressions/Cheatsheet) for a quick
lookup for a specific pattern/construct. | |
Mmdn_RegExp/toString_50_0.txt | * [ Updates | |
Mmdn_RegExp/Regularexpressions_185_0.txt |
#### JavaScript | |
Mmdn_RegExp/Mmdn_RegExp_28_5.txt | web%2Fjavascript%2Freference%2Fglobal_objects%2Fregexp%2Fexec%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-
US%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FRegExp%2Fexec%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-
us%2Fweb%2Fjavascript%2Freference%2Fg... | |
Mmdn_RegExp/Mmdn_RegExp_18_5.txt | ss multiple lines.
[ ` RegExp.prototype.source ` ](/en-
US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/source)
The text of the pattern.
[ ` RegExp.prototype.sticky ` ](/en-
US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/sticky)
Whether or not the search is sticky.
[ ` RegExp.prototype.u... | |
Mmdn_RegExp/Mmdn_RegExp_29_2.txt | t/Reference/Global_Objects/Object/constructor)
2. [ ` Object.prototype.__proto__ ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto) Deprecated
13. Methods
1. [ ` Object.prototype.__defineGetter__() ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__) Deprecated... | |
Mmdn_RegExp/exec_43_0.txt | ](/en-US/docs/Web/Accessibility) | |
Mmdn_RegExp/Mmdn_RegExp_6_3.txt | ew data.
## See also
* [ ` RegExp.prototype.lastIndex ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/lastIndex)
* [ ` RegExp.prototype.exec() ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/exec)
* [ ` RegExp.prototype.dotAll ` ](/en-US/docs/Web/JavaScript/Reference/Global_Object... | |
Mmdn_RegExp/Mmdn_RegExp_9_0.txt | * Skip to main content
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* References [ References ](/en-US/docs/Web)
* [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web)
* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_RegExp/exec_145_0.txt | Deprecated | |
Mmdn_RegExp/Regularexpressions_5_0.txt | * [ HTML | |
Mmdn_RegExp/Mmdn_RegExp_5_4.txt | /Reference/Global_Objects/RegExp/@@search)
* [ ` RegExp.prototype[@@split]() ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/@@split)
* [ ` RegExp.prototype.exec() ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/exec)
* [ ` RegExp.prototype.test() ` ](/en-US/docs/Web/JavaScript/Refer... | |
Mmdn_RegExp/toString_33_0.txt | Learn to structure web content with HTML | |
Mmdn_RegExp/toString_48_0.txt | Get real-time assistance and support | |
Mmdn_RegExp/Regularexpressions_194_0.txt | An online tool to learn, build, & test Regular Expressions. | |
Mmdn_RegExp/Mmdn_RegExp_23_0.txt | * Skip to main content
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* References [ References ](/en-US/docs/Web)
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* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_RegExp/Regularexpressions_75_0.txt | 14. [ for ](/en-US/docs/Web/JavaScript/Reference/Statements/for)
15. [ for await...of ](/en-US/docs/Web/JavaScript/Reference/Statements/for-await...of)
16. [ for...in ](/en-US/docs/Web/JavaScript/Reference/Statements/for...in)
17. [ for...of ](/en-US/docs/Web/JavaScript/Reference/Statements/for...of)
18. [ function ](/... | |
Mmdn_RegExp/toString_55_0.txt | ](/en-US/plus/docs/features/overview) | |
Mmdn_RegExp/Regularexpressions_95_0.txt | ### Using simple patterns | |
Mmdn_RegExp/exec_68_0.txt | ## In this article | |
Mmdn_RegExp/exec_86_0.txt | The 0-based index of the match in the string. | |
Mmdn_RegExp/Mmdn_RegExp_13_0.txt | * Skip to main content
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[ MDN Web Docs ](/en-US/) Open main menu
* References [ References ](/en-US/docs/Web)
* [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web)
* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_RegExp/javascriptregexpexer_5_0.txt | **Visual Presentation:** | |
Mmdn_RegExp/Mmdn_RegExp_8_3.txt | ult = /^hello/.test(str);
console.log(result); // true
The following example logs a message which depends on the success of the test:
js
function testInput(re, str) {
const midstring = re.test(str) ? "contains" : "does not contain";
console.log(`${str} ${midstring} ${re.source... | |
Mmdn_RegExp/toString_40_0.txt | ](/en-US/docs/Learn/JavaScript) | |
Mmdn_RegExp/exec_131_0.txt | [ MDN logo ](/) | |
Mmdn_RegExp/Mmdn_RegExp_25_3.txt | JavaScript enabled. Enable
JavaScript to view data.
## See also
* [ ` RegExp.input ($_) ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/input)
* [ ` RegExp.lastParen ($+) ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/lastParen)
* [ ` RegExp.leftContext ($`) ` ](/en-US/docs/Web/... | |
Mmdn_RegExp/Regularexpressions_71_0.txt | 1. [ Overview ](/en-US/docs/Web/JavaScript/Reference/Global_Objects)
2. [ AggregateError ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/AggregateError)
3. [ Array ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)
4. [ ArrayBuffer ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer)
5. [ ... | |
Mmdn_RegExp/Mmdn_RegExp_20_0.txt | * Skip to main content
* Skip to search
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* [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web)
* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_RegExp/exec_148_0.txt | ]: Non-standard. Check cross-browser support before using. | |
Mmdn_RegExp/exec_105_0.txt | In addition, ` re.lastIndex ` will be set to ` 25 ` , due to this regex being
global. | |
Mmdn_RegExp/toString_52_0.txt | ](/en-US/plus/updates) | |
Mmdn_RegExp/Regularexpressions_4_0.txt | ](/en-US/docs/Web) | |
Mmdn_RegExp/Regularexpressions_195_0.txt | [ Regex tester ](https://regex101.com/) | |
Mmdn_RegExp/exec_56_0.txt | * [ FAQ | |
Mmdn_RegExp/exec_137_0.txt | * [ Product help ](https://support.mozilla.org/products/mdn-plus)
* [ Report an issue ](/en-US/docs/MDN/Community/Issues) | |
Mmdn_RegExp/Regularexpressions_128_0.txt | Parentheses around any part of the regular expression pattern causes that part
of the matched substring to be remembered. Once remembered, the substring can
be recalled for other use. See [ Groups and backreferences ](/en-
US/docs/Web/JavaScript/Guide/Regular_expressions/Groups_and_backreferences#using_groups)
for more... | |
Mmdn_RegExp/exec_84_0.txt | If the match succeeds, the ` exec() ` method returns an array and updates the
[ ` lastIndex ` ](/en-
US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/lastIndex) property of
the regular expression object. The returned array has the matched text as the
first item, and then one item for each capturing group of the m... | |
Mmdn_RegExp/toString_32_0.txt | * [ HTML | |
Mmdn_RegExp/Mmdn_RegExp_0_0.txt | * Skip to main content
* Skip to search
* Skip to select language
[ MDN Web Docs ](/en-US/) Open main menu
* References [ References ](/en-US/docs/Web)
* [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web)
* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_RegExp/toString_65_0.txt | * English (US) | |
Mmdn_RegExp/Regularexpressions_133_0.txt | In the following example, the script uses the ` exec() ` method to find a
match in a string. | |
Mmdn_RegExp/Regularexpressions_126_0.txt | _Why isn't this built into JavaScript?_ There is a [ proposal
](https://github.com/tc39/proposal-regex-escaping) to add such a function to
RegExp. | |
Mmdn_RegExp/Regularexpressions_171_0.txt |
#### Using unicode regular expressions | |
Mmdn_RegExp/exec_96_0.txt | When using ` exec() ` , the global flag has no effect when the sticky flag is
set â the match is always sticky. | |
Mmdn_RegExp/toString_31_0.txt | ](/en-US/docs/Learn) | |
Mmdn_RegExp/Regularexpressions_211_0.txt | ## MDN | |
Mmdn_RegExp/exec_40_0.txt | ](/en-US/docs/Learn/JavaScript) | |
Mmdn_RegExp/Mmdn_RegExp_12_5.txt | Community/Issues)
## Our communities
* [ MDN Community ](/en-US/community)
* [ MDN Forum ](https://discourse.mozilla.org/c/mdn/236)
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## Developers
* [ Web Technologies ](/en-US/docs/Web)
* [ Learn Web Development ](/en-US/docs/Learn)
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* [ Hacks Blog... | |
Mmdn_RegExp/Regularexpressions_192_0.txt | ## Tools | |
Mmdn_RegExp/exec_62_0.txt | * [ Log in ](/users/fxa/login/authenticate/?next=%2Fen-US%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FRegExp%2Fexec)
* [ Sign up for free ](/users/fxa/login/authenticate/?next=%2Fen-US%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FRegExp%2Fexec) | |
Mmdn_RegExp/Regularexpressions_217_0.txt | ## Developers | |
Mmdn_RegExp/exec_102_0.txt | // Match "quick brown" followed by "jumps", ignoring characters in between
// Remember "brown" and "jumps"
// Ignore case
const re = /quick\s(?<color>brown).+?(jumps)/dgi;
const result = re.exec("The Quick Brown Fox Jumps Over The Lazy Dog"); | |
Mmdn_RegExp/toString_1_0.txt | [ MDN Web Docs ](/en-US/) Open main menu | |
Mmdn_RegExp/Regularexpressions_7_0.txt | ](/en-US/docs/Web/HTML) | |
Mmdn_RegExp/exec_72_0.txt | ## In this article | |
Mmdn_RegExp/Mmdn_RegExp_5_2.txt | Web/JavaScript/Reference/Global_Objects/Object/constructor)
2. [ ` Object.prototype.__proto__ ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto) Deprecated
13. Methods
1. [ ` Object.prototype.__defineGetter__() ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineGetter_... | |
Mmdn_RegExp/toString_67_0.txt | Filter sidebar Clear filter input | |
Mmdn_RegExp/Regularexpressions_220_0.txt | * [ Website Privacy Notice ](https://www.mozilla.org/privacy/websites/)
* [ Cookies ](https://www.mozilla.org/privacy/websites/#cookies)
* [ Legal ](https://www.mozilla.org/about/legal/terms/mozilla)
* [ Community Participation Guidelines ](https://www.mozilla.org/about/governance/policies/participation/) | |
Mmdn_RegExp/Regularexpressions_163_0.txt |
and get the same result. | |
Mmdn_RegExp/exec_73_0.txt | * Try it
* Syntax
* Description
* Examples
* Specifications
* Browser compatibility
* See also | |
Mmdn_RegExp/Mmdn_RegExp_16_1.txt | astIndex ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/lastIndex)
9. [ ` RegExp.lastMatch ($&) ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/lastMatch) Deprecated
10. [ ` RegExp.lastParen ($+) ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/lastParen) Deprecated... | |
Mmdn_RegExp/exec_118_0.txt |
This will log a message containing ` 'hello world!' ` . | |
Mmdn_RegExp/exec_27_0.txt | Learn web development | |
Mmdn_RegExp/Mmdn_RegExp_11_2.txt | /Object/constructor)
2. [ ` Object.prototype.__proto__ ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto) Deprecated
13. Methods
1. [ ` Object.prototype.__defineGetter__() ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__) Deprecated
2. [ ` Object.protot... | |
Mmdn_RegExp/Regularexpressions_147_0.txt | // "The value of lastIndex is 0" | |
Mmdn_RegExp/Mmdn_RegExp_18_0.txt | * Skip to main content
* Skip to search
* Skip to select language
[ MDN Web Docs ](/en-US/) Open main menu
* References [ References ](/en-US/docs/Web)
* [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web)
* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_RegExp/Regularexpressions_168_0.txt | console.log(re.exec(str)); // ["fee ", index: 0, input: "fee fi fo fum"]
console.log(re.exec(str)); // ["fi ", index: 4, input: "fee fi fo fum"]
console.log(re.exec(str)); // ["fo ", index: 7, input: "fee fi fo fum"]
console.log(re.exec(str)); // null | |
Mmdn_RegExp/exec_80_0.txt | ` str ` | |
Mmdn_RegExp/toString_66_0.txt | * [ Español ](/es/docs/Web/JavaScript/Reference/Global_Objects/RegExp/toString)
* [ Français ](/fr/docs/Web/JavaScript/Reference/Global_Objects/RegExp/toString)
* [ æ¥æ¬èª ](/ja/docs/Web/JavaScript/Reference/Global_Objects/RegExp/toString)
* [ Português (do Brasil) ](/pt-BR/docs/Web/JavaScript/Reference/Glob... | |
Mmdn_RegExp/Regularexpressions_183_0.txt | html | |
Mmdn_RegExp/Regularexpressions_24_0.txt | Web technology reference for developers | |
Mmdn_RegExp/javascriptregexpexer_23_0.txt | * **Weekly Trends and Language Statistics**
* [ Weekly Trends and Language Statistics ](https://www.w3resource.com/weekly-trends-and-language-statistics.php) | |
Mmdn_RegExp/exec_101_0.txt | Consider the following example: | |
Mmdn_RegExp/exec_44_0.txt | * Plus [ Plus ](/en-US/plus)
* [ Overview | |
Mmdn_RegExp/Regularexpressions_16_0.txt | ](/en-US/docs/Web/HTTP) | |
Mmdn_RegExp/toString_75_0.txt | The **` toString() ` ** method of [ ` RegExp ` ](/en-
US/docs/Web/JavaScript/Reference/Global_Objects/RegExp) instances returns a
string representing this regular expression. |
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