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+---
+title: RegExp
+slug: Web/JavaScript/Reference/Global_Objects/RegExp
+tags:
+ - Constructor
+ - JavaScript
+ - NeedsTranslation
+ - RegExp
+ - Regular Expressions
+ - TopicStub
+translation_of: Web/JavaScript/Reference/Global_Objects/RegExp
+---
+<div>{{JSRef("Global_Objects", "RegExp")}}</div>
+
+<h2 id="Summary">Summary</h2>
+
+<p>The <code><strong>RegExp</strong></code> constructor creates a regular expression object for matching text with a pattern.</p>
+
+<p>For an introduction on what  regular expressions are, read the <a href="/en-US/docs/Web/JavaScript/Guide/Regular_Expressions">Regular Expressions chapter in the JavaScript Guide</a>.</p>
+
+<h2 id="Constructor">Constructor</h2>
+
+<p>Literal and constructor notations are possible:</p>
+
+<pre class="syntaxbox"><code>/<em>pattern</em>/<em>flags;
+</em></code>
+new <code>RegExp(<em>pattern</em> <em>[, flags]</em>)</code>;
+</pre>
+
+<h3 id="Parameters">Parameters</h3>
+
+<dl>
+ <dt><code>pattern</code></dt>
+ <dd>The text of the regular expression.</dd>
+ <dt><code>flags</code></dt>
+ <dd>
+ <p>If specified, flags can have any combination of the following values:</p>
+
+ <dl>
+ <dt><code>g</code></dt>
+ <dd>global match</dd>
+ <dt><code>i</code></dt>
+ <dd>ignore case</dd>
+ <dt><code>m</code></dt>
+ <dd>multiline; treat beginning and end characters (^ and $) as working over multiple lines (i.e., match the beginning or end of <em>each</em> line (delimited by \n or \r), not only the very beginning or end of the whole input string)</dd>
+ <dt><code>y</code></dt>
+ <dd>sticky; matches only from the index indicated by the <code>lastIndex</code> property of this regular expression in the target string (and does not attempt to match from any later indexes).</dd>
+ </dl>
+ </dd>
+</dl>
+
+<h2 id="Description">Description</h2>
+
+<p>There are 2 ways to create a RegExp object: a literal notation and a constructor. To indicate strings, the parameters to the literal notation do not use quotation marks while the parameters to the constructor function do use quotation marks. So the following expressions create the same regular expression:</p>
+
+<pre class="brush: js">/ab+c/i;
+new RegExp("ab+c", "i");
+</pre>
+
+<p>The literal notation provides compilation of the regular expression when the expression is evaluated. Use literal notation when the regular expression will remain constant. For example, if you use literal notation to construct a regular expression used in a loop, the regular expression won't be recompiled on each iteration.</p>
+
+<p>The constructor of the regular expression object, for example, <code>new RegExp("ab+c")</code>, provides runtime compilation of the regular expression. Use the constructor function when you know the regular expression pattern will be changing, or you don't know the pattern and are getting it from another source, such as user input.</p>
+
+<p>When using the constructor function, the normal string escape rules (preceding special characters with \ when included in a string) are necessary. For example, the following are equivalent:</p>
+
+<pre class="brush: js">var re = /\w+/;
+var re = new RegExp("\\w+");
+</pre>
+
+<h2 id="Special_characters_meaning_in_regular_expressions">Special characters meaning in regular expressions</h2>
+
+<ul>
+ <li><a href="#character-classes">Character Classes</a></li>
+ <li><a href="#character-sets">Character Sets</a></li>
+ <li><a href="#boundaries">Boundaries</a></li>
+ <li><a href="#grouping-back-references">Grouping and back references</a></li>
+ <li><a href="#quantifiers">Quantifiers</a></li>
+</ul>
+
+<table class="fullwidth-table">
+ <tbody>
+ <tr id="character-classes">
+ <th colspan="2">Character Classes</th>
+ </tr>
+ <tr>
+ <th>Character</th>
+ <th>Meaning</th>
+ </tr>
+ <tr>
+ <td><code>.</code></td>
+ <td>
+ <p>(The dot, the decimal point) matches any single character <em>except</em> the newline characters: <code>\n</code> <code>\r</code> <code>\u2028</code> or <code>\u2029</code>.</p>
+
+ <p>Note that the <code>m</code> multiline flag doesn't change the dot behavior. So to match a pattern across multiple lines the character set <code>[^]</code> can be used (if you don't mean an old version of IE, of course), it will match any character including newlines.</p>
+
+ <p>For example, <code>/.y/</code> matches "my" and "ay", but not "yes", in "yes make my day".</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\d</code></td>
+ <td>
+ <p>Matches a digit character in the basic Latin alphabet. Equivalent to <code>[0-9]</code>.</p>
+
+ <p>For example, <code>/\d/</code> or <code>/[0-9]/</code> matches '2' in "B2 is the suite number."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\D</code></td>
+ <td>
+ <p>Matches any character that is not a digit in the basic Latin alphabet. Equivalent to <code>[^0-9]</code>.</p>
+
+ <p>For example, <code>/\D/</code> or <code>/[^0-9]/</code> matches 'B' in "B2 is the suite number."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\w</code></td>
+ <td>
+ <p>Matches any alphanumeric character from the basic Latin alphabet, including the underscore. Equivalent to <code>[A-Za-z0-9_]</code>.</p>
+
+ <p>For example, <code>/\w/</code> matches 'a' in "apple," '5' in "$5.28," and '3' in "3D."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\W</code></td>
+ <td>
+ <p>Matches any character that is not a word character from the basic Latin alphabet. Equivalent to <code>[^A-Za-z0-9_]</code>.</p>
+
+ <p>For example, <code>/\W/</code> or <code>/[^A-Za-z0-9_]/</code> matches '%' in "50%."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\s</code></td>
+ <td>
+ <p>Matches a single white space character, including space, tab, form feed, line feed and other Unicode spaces. Equivalent to <code>[ \f\n\r\t\v​\u00a0\u1680​\u180e\u2000​\u2001\u2002​\u2003\u2004​ \u2005\u2006​\u2007\u2008​\u2009\u200a​\u2028\u2029​​\u202f\u205f​ \u3000]</code>.</p>
+
+ <p>For example, <code>/\s\w*/</code> matches ' bar' in "foo bar."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\S</code></td>
+ <td>
+ <p>Matches a single character other than white space. Equivalent to <code><code>[^ \f\n\r\t\v​\u00a0\u1680​\u180e\u2000​\u2001\u2002​\u2003\u2004​ \u2005\u2006​\u2007\u2008​\u2009\u200a​\u2028\u2029​\u202f\u205f​\u3000]</code></code>.</p>
+
+ <p>For example, <code>/\S\w*/</code> matches 'foo' in "foo bar."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\t</code></td>
+ <td>Matches a tab.</td>
+ </tr>
+ <tr>
+ <td><code>\r</code></td>
+ <td>Matches a carriage return.</td>
+ </tr>
+ <tr>
+ <td><code>\n</code></td>
+ <td>Matches a linefeed.</td>
+ </tr>
+ <tr>
+ <td><code>\v</code></td>
+ <td>Matches a vertical tab.</td>
+ </tr>
+ <tr>
+ <td><code>\f</code></td>
+ <td>Matches a form-feed.</td>
+ </tr>
+ <tr>
+ <td><code>[\b]</code></td>
+ <td>Matches a backspace. (Not to be confused with <code>\b</code>)</td>
+ </tr>
+ <tr>
+ <td><code>\0</code></td>
+ <td>Matches a NUL character. Do not follow this with another digit.</td>
+ </tr>
+ <tr>
+ <td><code>\c<em>X</em></code></td>
+ <td>
+ <p>Where <code><em>X</em></code> is a letter from A - Z. Matches a control character in a string.</p>
+
+ <p>For example, <code>/\cM/</code> matches control-M in a string.</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\x<em>hh</em></code></td>
+ <td>Matches the character with the code <code><em>hh</em></code> (two hexadecimal digits)</td>
+ </tr>
+ <tr>
+ <td><code>\u<em>hhhh</em></code></td>
+ <td>Matches the character with the Unicode value <code><em>hhhh</em></code> (four hexadecimal digits).</td>
+ </tr>
+ <tr>
+ <td><code>\</code></td>
+ <td>
+ <p>For characters that are usually treated literally, indicates that the next character is special and not to be interpreted literally.</p>
+
+ <p>For example, <code>/b/</code> matches the character 'b'. By placing a backslash in front of b, that is by using <code>/\b/</code>, the character becomes special to mean match a word boundary.</p>
+
+ <p><em>or</em></p>
+
+ <p>For characters that are usually treated specially, indicates that the next character is not special and should be interpreted literally.</p>
+
+ <p>For example, * is a special character that means 0 or more occurrences of the preceding character should be matched; for example, <code>/a*/</code> means match 0 or more "a"s. To match <code>*</code> literally, precede it with a backslash; for example, <code>/a\*/</code> matches 'a*'.</p>
+ </td>
+ </tr>
+ </tbody>
+ <tbody>
+ <tr id="character-sets">
+ <th colspan="2">
+ <p>Character Sets</p>
+ </th>
+ </tr>
+ <tr>
+ <th>Character</th>
+ <th>Meaning</th>
+ </tr>
+ <tr>
+ <td><code>[xyz]</code></td>
+ <td>
+ <p>A character set. Matches any one of the enclosed characters. You can specify a range of characters by using a hyphen.</p>
+
+ <p>For example, <code>[abcd]</code> is the same as <code>[a-d]</code>. They match the 'b' in "brisket" and the 'c' in "chop".</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>[^xyz]</code></td>
+ <td>
+ <p>A negated or complemented character set. That is, it matches anything that is not enclosed in the brackets. You can specify a range of characters by using a hyphen.</p>
+
+ <p>For example, <code>[^abc]</code> is the same as <code>[^a-c]</code>. They initially match 'o' in "bacon" and 'h' in "chop."</p>
+ </td>
+ </tr>
+ </tbody>
+ <tbody>
+ <tr id="boundaries">
+ <th colspan="2">Boundaries</th>
+ </tr>
+ <tr>
+ <th>Character</th>
+ <th>Meaning</th>
+ </tr>
+ <tr>
+ <td><code>^</code></td>
+ <td>
+ <p>Matches beginning of input. If the multiline flag is set to true, also matches immediately after a line break character.</p>
+
+ <p>For example, <code>/^A/</code> does not match the 'A' in "an A", but does match the first 'A' in "An A."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>$</code></td>
+ <td>
+ <p>Matches end of input. If the multiline flag is set to true, also matches immediately before a line break character.</p>
+
+ <p>For example, <code>/t$/</code> does not match the 't' in "eater", but does match it in "eat".</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\b</code></td>
+ <td>
+ <p>Matches a zero-width word boundary, such as between a letter and a space. (Not to be confused with <code>[\b]</code>)</p>
+
+ <p>For example, <code>/\bno/</code> matches the 'no' in "at noon"; <code>/ly\b/</code> matches the 'ly' in "possibly yesterday."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\B</code></td>
+ <td>
+ <p>Matches a zero-width non-word boundary, such as between two letters or between two spaces.</p>
+
+ <p>For example, <code>/\Bon/</code> matches 'on' in "at noon", and <code>/ye\B/</code> matches 'ye' in "possibly yesterday."</p>
+ </td>
+ </tr>
+ </tbody>
+ <tbody>
+ <tr id="grouping-back-references">
+ <th colspan="2">Grouping and back references</th>
+ </tr>
+ <tr>
+ <th>Character</th>
+ <th>Meaning</th>
+ </tr>
+ <tr>
+ <td><code>(<em>x</em>)</code></td>
+ <td>
+ <p>Matches <code><em>x</em></code> and remembers the match. These are called capturing parentheses.</p>
+
+ <p>For example, <code>/(foo)/</code> matches and remembers 'foo' in "foo bar." The matched substring can be recalled from the resulting array's elements <code>[1], ..., [n]</code> or from the predefined <code>RegExp</code> object's properties <code>$1, ..., $9</code>.</p>
+
+ <p>Capturing groups have a performance penalty. If you don't need the matched substring to be recalled, prefer non-capturing parentheses (see below).</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>\<em>n</em></code></td>
+ <td>
+ <p>Where <code><em>n</em></code> is a positive integer. A back reference to the last substring matching the n parenthetical in the regular expression (counting left parentheses).</p>
+
+ <p>For example, <code>/apple(,)\sorange\1/</code> matches 'apple, orange,' in "apple, orange, cherry, peach." A more complete example follows this table.</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code>(?:<em>x</em>)</code></td>
+ <td>Matches <code><em>x</em></code> but does not remember the match. These are called non-capturing parentheses. The matched substring can not be recalled from the resulting array's elements <code>[1], ..., [n]</code> or from the predefined <code>RegExp</code> object's properties <code>$1, ..., $9</code>.</td>
+ </tr>
+ </tbody>
+ <tbody>
+ <tr id="quantifiers">
+ <th colspan="2">Quantifiers</th>
+ </tr>
+ <tr>
+ <th>Character</th>
+ <th>Meaning</th>
+ </tr>
+ <tr>
+ <td><code><em>x</em>*</code></td>
+ <td>
+ <p>Matches the preceding item <em>x</em> 0 or more times.</p>
+
+ <p>For example, <code>/bo*/</code> matches 'boooo' in "A ghost booooed" and 'b' in "A bird warbled", but nothing in "A goat grunted".</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code><em>x</em>+</code></td>
+ <td>
+ <p>Matches the preceding item <em>x</em> 1 or more times. Equivalent to <code>{1,}</code>.</p>
+
+ <p>For example, <code>/a+/</code> matches the 'a' in "candy" and all the a's in "caaaaaaandy".</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code><em>x</em>*?</code><br>
+ <code><em>x</em>+?</code></td>
+ <td>
+ <p>Matches the preceding item <em>x</em> like <code>*</code> and <code>+</code> from above, however the match is the smallest possible match.</p>
+
+ <p>For example, <code>/".*?"/</code> matches '"foo"' in '"foo" "bar"' and does not match '"foo" "bar"' as without the <code>?</code> behind the <code>*</code>.</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code><em>x</em>?</code></td>
+ <td>
+ <p>Matches the preceding item <em>x</em> 0 or 1 time.</p>
+
+ <p>For example, <code>/e?le?/</code> matches the 'el' in "angel" and the 'le' in "angle."</p>
+
+ <p>If used immediately after any of the quantifiers <code>*</code>, <code>+</code>, <code>?</code>, or <code>{}</code>, makes the quantifier non-greedy (matching the minimum number of times), as opposed to the default, which is greedy (matching the maximum number of times).</p>
+
+ <p>Also used in lookahead assertions, described under <code>(?=)</code>, <code>(?!)</code>, and <code>(?:)</code> in this table.</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code><em>x</em>(?=<em>y</em>)</code></td>
+ <td>Matches <code><em>x</em></code> only if <code><em>x</em></code> is followed by <code><em>y</em></code>. For example, <code>/Jack(?=Sprat)/</code> matches 'Jack' only if it is followed by 'Sprat'. <code>/Jack(?=Sprat|Frost)/</code> matches 'Jack' only if it is followed by 'Sprat' or 'Frost'. However, neither 'Sprat' nor 'Frost' is part of the match results.</td>
+ </tr>
+ <tr>
+ <td><code><em>x</em>(?!<em>y</em>)</code></td>
+ <td>
+ <p>Matches <code><em>x</em></code> only if <code><em>x</em></code> is not followed by <code><em>y</em></code>. For example, <code>/\d+(?!\.)/</code> matches a number only if it is not followed by a decimal point.</p>
+
+ <p><code>/\d+(?!\.)/.exec("3.141")</code> matches 141 but not 3.141.</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code><em>x</em>|<em>y</em></code></td>
+ <td>
+ <p>Matches either <code><em>x</em></code> or <code><em>y</em></code>.</p>
+
+ <p>For example, <code>/green|red/</code> matches 'green' in "green apple" and 'red' in "red apple."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code><em>x</em>{<em>n</em>}</code></td>
+ <td>
+ <p>Where <code><em>n</em></code> is a positive integer. Matches exactly <code><em>n</em></code> occurrences of the preceding item <em>x</em>.</p>
+
+ <p>For example, <code>/a{2}/</code> doesn't match the 'a' in "candy," but it matches all of the a's in "caandy," and the first two a's in "caaandy."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code><em>x</em>{<em>n</em>,}</code></td>
+ <td>
+ <p>Where <code><em>n</em></code> is a positive integer. Matches at least <code><em>n</em></code> occurrences of the preceding item <em>x</em>.</p>
+
+ <p>For example, <code>/a{2,}/</code> doesn't match the 'a' in "candy", but matches all of the a's in "caandy" and in "caaaaaaandy."</p>
+ </td>
+ </tr>
+ <tr>
+ <td><code><em>x</em>{<em>n</em>,<em>m</em>}</code></td>
+ <td>
+ <p>Where <code><em>n</em></code> and <code><em>m</em></code> are positive integers. Matches at least <code><em>n</em></code> and at most <code><em>m</em></code> occurrences of the preceding item <em>x</em>.</p>
+
+ <p>For example, <code>/a{1,3}/</code> matches nothing in "cndy", the 'a' in "candy," the two a's in "caandy," and the first three a's in "caaaaaaandy". Notice that when matching "caaaaaaandy", the match is "aaa", even though the original string had more a's in it.</p>
+ </td>
+ </tr>
+ </tbody>
+</table>
+
+<h3 id="Properties"><span style="font-size: 1.714285714285714rem;">Properties</span></h3>
+
+<dl>
+ <dt>{{jsxref("RegExp.prototype")}}</dt>
+ <dd>Allows the addition of properties to all objects.</dd>
+ <dt>RegExp.length</dt>
+ <dd>The value of <code>RegExp.length</code> is 2.</dd>
+</dl>
+
+<div>{{jsOverrides("Function", "Properties", "prototype")}}</div>
+
+<h3 id="Methods">Methods</h3>
+
+<p>The global <code>RegExp</code> object has no methods of its own, however, it does inherit some methods through the prototype chain.</p>
+
+<div>{{jsOverrides("Function", "Methods", "prototype")}}</div>
+
+<h2 id="RegExp_prototype_objects_and_instances"><code>RegExp</code> prototype objects and instances</h2>
+
+<h3 id="Properties_2">Properties</h3>
+
+<div>{{page('en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/prototype','Properties')}}</div>
+
+<h3 id="Methods_2">Methods</h3>
+
+<div>{{page('en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/prototype','Methods')}}</div>
+
+<h2 id="Examples">Examples</h2>
+
+<h3 id="Example_Using_a_regular_expression_to_change_data_format">Example: Using a regular expression to change data format</h3>
+
+<p>The following script uses the {{jsxref("String.replace", "replace")}} method of the {{jsxref("Global_Objects/String", "String")}} instance to match a name in the format <em>first last</em> and output it in the format <em>last</em>, <em>first</em>. In the replacement text, the script uses <code>$1</code> and <code>$2</code> to indicate the results of the corresponding matching parentheses in the regular expression pattern.</p>
+
+<pre class="brush: js">var re = /(\w+)\s(\w+)/;
+var str = "John Smith";
+var newstr = str.replace(re, "$2, $1");
+console.log(newstr);</pre>
+
+<p>This displays "Smith, John".</p>
+
+<h3 id="Example_Using_regular_expression_on_multiple_lines">Example: Using regular expression on multiple lines</h3>
+
+<pre class="brush: js">var s = "Please yes\nmake my day!";
+s.match(/yes.*day/);
+// Returns null
+s.match(/yes[^]*day/);
+// Returns 'yes\nmake my day'
+</pre>
+
+<h3 id="Example_Using_a_regular_expression_with_the_sticky_flag">Example: Using a regular expression with the "sticky" flag</h3>
+
+<p>This example demonstrates how one could use the sticky flag on regular expressions to match individual lines of multiline input.</p>
+
+<pre class="brush: js">var text = "First line\nSecond line";
+var regex = /(\S+) line\n?/y;
+
+var match = regex.exec(text);
+<span style="font-size: 1rem;">console.log</span>(match[1]); // prints "First"
+<span style="font-size: 1rem;">console.log</span>(regex.lastIndex); // prints 11
+
+var match2 = regex.exec(text);
+<span style="font-size: 1rem;">console.log</span>(match2[1]); // prints "Second"
+<span style="font-size: 1rem;">console.log</span>(regex.lastIndex); // prints "22"
+
+var match3 = regex.exec(text);
+<span style="font-size: 1rem;">console.log</span>(match3 === null); // prints "true"</pre>
+
+<p>One can test at run-time whether the sticky flag is supported, using <code>try { … } catch { … }</code>. For this, either an <code>eval(…)</code> expression or the <code>RegExp(<var>regex-string</var>, <var>flags-string</var>)</code> syntax must be used (since the <code>/<var>regex</var>/<var>flags</var></code> notation is processed at compile-time, so throws an exception before the <code>catch</code> block is encountered). For example:</p>
+
+<pre class="brush: js">var supports_sticky;
+try { RegExp('','y'); supports_sticky = true; }
+catch(e) { supports_sticky = false; }
+alert(supports_sticky); // alerts "true"</pre>
+
+<h3 id="Example_Regular_expression_and_Unicode_characters">Example: Regular expression and Unicode characters</h3>
+
+<p>As mentioned above, <code>\w</code> or <code>\W</code> only matches ASCII based characters; for example, 'a' to 'z', 'A' to 'Z', 0 to 9 and '_'. To match characters from other languages such as Cyrillic or Hebrew, use <code>\uhhhh</code>., where "hhhh" is the character's Unicode value in hexadecimal. This example demonstrates how one can separate out Unicode characters from a word.</p>
+
+<pre class="brush: js">var text = "Образец text на русском языке";
+var regex = /[\u0400-\u04FF]+/g;
+
+var match = regex.exec(text);
+<span style="font-size: 1rem;">console.log</span>(match[0]); // prints "Образец"
+<span style="font-size: 1rem;">console.log</span>(regex.lastIndex); // prints "7"
+
+var match2 = regex.exec(text);
+<span style="font-size: 1rem;">console.log</span>(match2[0]); // prints "на" [did not print "text"]
+<span style="font-size: 1rem;">console.log</span>(regex.lastIndex); // prints "15"
+
+// and so on</pre>
+
+<p>Here's an external resource for getting the complete Unicode block range for different scripts: <a href="http://kourge.net/projects/regexp-unicode-block" title="http://kourge.net/projects/regexp-unicode-block">Regexp-unicode-block</a></p>
+
+<h3 id="Example_Extracting_subdomain_name_from_URL">Example: Extracting subdomain name from URL</h3>
+
+<pre class="brush: js">var url = "http://xxx.domain.com";
+<span style="font-size: 1rem;">console.log</span>(/[^.]+/.exec(url)[0].substr(7)); // prints "xxx"</pre>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ <tr>
+ <td>ECMAScript 1st Edition. Implemented in JavaScript 1.1</td>
+ <td>Standard</td>
+ <td>Initial definition.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES5.1', '#sec-15.10', 'RegExp')}}</td>
+ <td>{{Spec2('ES5.1')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES6', '#sec-regexp-regular-expression-objects', 'RegExp')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td> </td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<p>{{ CompatibilityTable() }}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Feature</th>
+ <th>Chrome</th>
+ <th>Firefox (Gecko)</th>
+ <th>Internet Explorer</th>
+ <th>Opera</th>
+ <th>Safari</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ </tr>
+ <tr>
+ <td>Sticky flag ("y")</td>
+ <td>39 (behind flag)</td>
+ <td>{{ CompatGeckoDesktop("1.9") }} ES4-Style {{bug(773687)}}</td>
+ <td>{{ CompatNo() }}</td>
+ <td>{{ CompatNo() }}</td>
+ <td>{{ CompatNo() }}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Feature</th>
+ <th>Android</th>
+ <th>Chrome for Android</th>
+ <th>Firefox Mobile (Gecko)</th>
+ <th>IE Mobile</th>
+ <th>Opera Mobile</th>
+ <th>Safari Mobile</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ </tr>
+ <tr>
+ <td>Sticky flag ("y")</td>
+ <td>{{ CompatNo() }}</td>
+ <td>{{ CompatNo() }}</td>
+ <td>{{ CompatGeckoDesktop("1.9") }} ES4-Style {{bug(773687)}}</td>
+ <td>{{ CompatNo() }}</td>
+ <td>{{ CompatNo() }}</td>
+ <td>{{ CompatNo() }}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/JavaScript/Guide/Regular_Expressions" title="JavaScript/Guide/Regular_Expressions">Regular Expressions</a> chapter in the <a href="/en-US/docs/Web/JavaScript/Guide" title="JavaScript/Guide">JavaScript Guide</a></li>
+ <li><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/match">String.prototype.match()</a></li>
+ <li><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace">String.prototype.replace()</a></li>
+</ul>
diff --git a/files/fa/web/javascript/reference/global_objects/regexp/test/index.html b/files/fa/web/javascript/reference/global_objects/regexp/test/index.html
new file mode 100644
index 0000000000..1690ceb375
--- /dev/null
+++ b/files/fa/web/javascript/reference/global_objects/regexp/test/index.html
@@ -0,0 +1,123 @@
+---
+title: RegExp.prototype.test()
+slug: Web/JavaScript/Reference/Global_Objects/RegExp/test
+tags:
+ - جاوا اسکریپت
+ - جستجو
+ - متد
+translation_of: Web/JavaScript/Reference/Global_Objects/RegExp/test
+---
+<div dir="rtl">
+ {{JSRef("Global_Objects", "RegExp")}}</div>
+<h2 dir="rtl" id="Summary" name="Summary">خلاصه</h2>
+<p dir="rtl"><strong>متد test یک جستجو برای یافتن رشته خاص در متن یا رشته مورد نظر انجام میدهد و True یا False برمیگرداند.</strong></p>
+<h2 dir="rtl" id="Syntax" name="Syntax">ساختار</h2>
+<pre dir="rtl"><var>regexObj</var>.test(str)</pre>
+<h3 dir="rtl" id="Parameters" name="Parameters"><strong>پارامتر ها</strong></h3>
+<dl>
+ <dt dir="rtl">
+ <code>str</code></dt>
+ <dd dir="rtl">
+ <strong>رشته ای که میخواهید با متن مورد نظر تطابق دهید.</strong></dd>
+</dl>
+<h3 dir="rtl" id="مقدار_بازگشتی"><strong>مقدار بازگشتی</strong></h3>
+<p dir="rtl"><strong>مقدار بازگشتی از نوع Boolean بوده و True یا False میباشد.</strong></p>
+<h2 dir="rtl" id="Description" name="Description">توضیحات</h2>
+<p dir="rtl"><strong>متد test() زمانی استفاده میشود که میخواهید الگو مورد نظر خود را در یک متن جستجو کنید و از وجود آن در متن مورد نظر با خبر شوید.</strong></p>
+<p dir="rtl"><strong>متدهای مرتبط :</strong> {jsxref("String.search") , {jsxref("RegExp.exec", "exec")</p>
+<h2 dir="rtl" id="Examples" name="Examples">مثال</h2>
+<h3 dir="rtl" id="Example:_Using_test" name="Example:_Using_test"><code>مثال: استفاده از test</code></h3>
+<p dir="rtl"><strong>مثال زیر یک خروجی را چاپ میکند که اشاره به موفقیت آمیز بودن جستجو دارد:</strong></p>
+<pre class="brush: js" dir="rtl">function testinput(re, str){
+ var midstring;
+ if (re.test(str)) {
+ midstring = " contains ";
+ } else {
+ midstring = " does not contain ";
+ }
+ console.log(str + midstring + re.source);
+}
+</pre>
+<h2 dir="rtl" id="خصوصیات">خصوصیات</h2>
+<table class="standard-table" dir="rtl">
+ <tbody>
+ <tr>
+ <th scope="col">خصوصیت</th>
+ <th scope="col">وضعیت</th>
+ <th scope="col">یاداشت</th>
+ </tr>
+ <tr>
+ <td>ECMAScript 3rd Edition. Implemented in JavaScript 1.2</td>
+ <td>Standard</td>
+ <td>Initial definition.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES5.1', '#sec-15.10.6.3', 'RegExp.test')}}</td>
+ <td>{{Spec2('ES5.1')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES6', '#sec-regexp.prototype.test', 'RegExp.test')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td> </td>
+ </tr>
+ </tbody>
+</table>
+<h2 dir="rtl" id="سازگاری_با_مرورگرها">سازگاری با مرورگرها</h2>
+<p dir="rtl">{{ CompatibilityTable() }}</p>
+<div dir="rtl" id="compat-desktop">
+ <table class="compat-table">
+ <tbody>
+ <tr>
+ <th>خصوصیات</th>
+ <th>گوگل کروم</th>
+ <th>فایرفاکس</th>
+ <th>اینترنت اکسپلورر</th>
+ <th>اپرا</th>
+ <th>سافاری</th>
+ </tr>
+ <tr>
+ <td>پشتیبانی ابتدایی</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ </tr>
+ </tbody>
+ </table>
+</div>
+<div dir="rtl" id="compat-mobile">
+ <table class="compat-table">
+ <tbody>
+ <tr>
+ <th>خصوصیات</th>
+ <th>اندروید</th>
+ <th>گوگل کروم برای اندروید</th>
+ <th>فایرفاکس موبایل</th>
+ <th>اینترنت اکسپلورر موبایل</th>
+ <th>اپرا موبایل</th>
+ <th>سافاری موبایل</th>
+ </tr>
+ <tr>
+ <td>پشتیبانی ابتدایی</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ <td>{{ CompatVersionUnknown() }}</td>
+ </tr>
+ </tbody>
+ </table>
+</div>
+<h3 dir="rtl" id="sect1"> </h3>
+<h3 dir="rtl" id="یادداشتی_برای_Gecko-specific"><strong>یادداشتی برای Gecko-specific</strong></h3>
+<p dir="rtl"><strong>قبل از نسخه Gecko 8.0 {{ geckoRelease("8.0") }} تابع test() مشکلاتی به همراه داشت ، زمانی که این تابع بدون پارامتر ورودی فراخوانی میشد الگو را با متن قبلی مطابقت میداد (RegExp.input property) در حالی که بایستی رشته "undefined" را قرار میداد. در حال حاضر این مشکل برطرف شده است و <code>این تابع به درستی کار میکند.</code></strong></p>
+<p dir="rtl"> </p>
+<p dir="rtl"> </p>
+<h2 dir="rtl" id="همچنین_سری_بزنید_به">همچنین سری بزنید به :</h2>
+<ul dir="rtl">
+ <li><a href="/en-US/docs/Web/JavaScript/Guide/Regular_Expressions" title="JavaScript/Guide/Regular_Expressions">Regular Expressions</a> chapter in the <a href="/en-US/docs/Web/JavaScript/Guide" title="JavaScript/Guide">JavaScript Guide</a></li>
+ <li>{{jsxref("Global_Objects/RegExp", "RegExp")}}</li>
+</ul>
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-02-01 09:13:04 +0000