JavaScript | RegExp \uxxxx Metacharacter
The RegExp \uxxxx Metacharacter in JavaScript is used to find the unicode character specified by a hexadecimal number xxxx. If match is found it returns the word else it returns NULL.
Syntax:
/\uxxxx/
or
new RegExp("\\uxxxx")Syntax with modifiers:
/\uxxxx/g
or
new RegExp("\\uxxxx", "g")Example 1: This example matches the word corresponding to hexadecimal number 0047 i.e G in the whole string.
<!DOCTYPE html><html> <head> <title> JavaScript RegExp \uxxxx Metacharacter </title></head> <body style="text-align:center"> <h1 style="color:green"> GeeksforGeeks </h1> <h2>RegExp \uxxxx Metacharacter</h2> <p>Input String: GeeksforGeeks@_123_$</p> <button onclick="geek()"> Click it! </button> <p id="app"></p> <script> function geek() { var str1 = "GeeksforGeeks@_123_$"; var regex4 = /\u0047/gi; var match4 = str1.match(regex4); document.getElementById("app").innerHTML = "Found " + match4.length + " match: " + match4; } </script></body> </html> |
Output:
Before Clicking the button:
After Clicking the button:
Example 2: This example matches the hexadecimal number (0067) which corresponds to “g” and replaces it with “G”.
<!DOCTYPE html><html> <head> <title> JavaScript RegExp \uxxxx Metacharacter </title></head> <body style="text-align:center"> <h1 style="color:green"> GeeksforGeeks </h1> <h2>RegExp \uxxxx Metacharacter</h2> <p>String: geeky@128</p> <button onclick="geek()"> Click it! </button> <p id="app"></p> <script> function geek() { var str1 = "geeky@128"; var regex4 = new RegExp("\\u0067", "gi"); var replace = "G"; var match4 = str1.replace(regex4, replace); document.getElementById("app").innerHTML = " New string: " + match4; } </script></body> </html> |
Output:
Before Clicking the button:
After Clicking the button:
Supported Browsers: The browsers supported by RegExp \uxxxx Metacharacter are listed below:
- Google Chrome
- Apple Safari
- Mozilla Firefox
- Opera
- Internet Explorer
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