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