JavaScript \uxxxx RegExp Metacharacter

The regular expression tests, matches, and searches Unicode characters of the hexadecimal number using \uxxxx expression in JavaScript. Using a single line, JavaScript uses regex to get words only in the string. It supports web and desktop applications with JavaScript as validations.

Syntax

Syntax without modifiers

The syntax is used to get the Unicode character of the hexadecimal number.

Syntax with modifiers

The syntax is used to get the hexadecimal number with required modifiers.

Supported Browsers

The javascript \uxxxx regex Metacharacter supports the following browsers supported using the javascript function:

Google Chrome browser
Safari browser
Mozilla Firefox
Opera browser
Internet Explorer browser

Examples

The following examples search, match, test, and execute word character metacharacter of the regex in JavaScript.

Example1: use the test method with the regex modifier

The following example shows hexadecimal values in Unicode characters using the regex in JavaScript. Here, the test method is used to get the value's Boolean output.

<!DOCTYPE html>
<html>
<head>
<title>
JavaScript RegExp \uxxx (hexadecimal) Metacharacter
</title>
</head>
<body>
<h3>
JavaScript RegExp \uxxx (hexadecimal) Metacharacter
</h3>
<h4> We can use the validation for the hexadecimal input values and shows in the Unicode character.
</h4>
<div id = "regex_information"></div>
<button onclick = "uni_display();"> Click Here!</button>
<script>
function uni_display() {
let input_pattern = /\u0075/g;
var input_regex1 = input_pattern.test('Hello Student');
var input_regex2 = input_pattern.test('you can learn');
var input_regex3 = input_pattern.test('ur new subject');
var regex_ele = document.getElementById("regex_information");
regex_ele.innerHTML = " Hello Student : "+input_regex1+"<br> you can learn : "+input_regex2+" <br> ur new subject : "+input_regex3
}
</script>
</body>
</html>

Output

The output shows the availability of the hexadecimal input string.

$JavaScript \uxxxx RegExp Metacharacter$

Example2: use the search method without the regex modifier

The following example uses only regular expressions for the string without any modifier.

<!DOCTYPE html>
<html>
<head>
<title>
JavaScript RegExp \uxxx (hexadecimal) Metacharacter
</title>
</head>
<body>
<h3>
JavaScript RegExp \uxxx (hexadecimal) Metacharacter
</h3>
<h4> We can use the validation for the hexadecimal input values and shows in the Unicode character.
</h4>
<div id = "regex_information"></div>
<button onclick = "uni_display();"> Click Here!</button>
<script>
function uni_display() {
let input_pattern = /\u0075/;
var input_val1 = 'Hello Student';
var input_val2 = 'you can learn';
var input_val3 = 'ur new subject';
var input_regex1 = input_val1.match(input_pattern);
var input_regex2 = input_val2.match(input_pattern);
var input_regex3 = input_val3.match(input_pattern);
var regex_ele = document.getElementById("regex_information");
regex_ele.innerHTML = " Hello Student : "+input_regex1+"<br> you can learn : "+input_regex2+" <br> ur new subject : "+input_regex3
}
</script>
</body>
</html>

Output

The output shows the Unicode character of the hexadecimal input string.

$JavaScript \uxxxx RegExp Metacharacter$

Example3: use the exec method with the regex modifier

The following example uses only regular expressions for the string with a global modifier. It searches the entire value of the input string.

<!DOCTYPE html>
<html>
<head>
<title>
JavaScript RegExp \uxxx (hexadecimal) Metacharacter
</title>
</head>
<body>
<h3>
JavaScript RegExp \uxxx (hexadecimal) Metacharacter
</h3>
<h4> We can use the validation for the hexadecimal input values and shows in the Unicode character.
</h4>
<div id = "regex_information"></div>
<button onclick = "uni_display();"> Click Here!</button>
<script>
function uni_display() {
let input_pattern = /\u0075/g;
var input_regex1 = input_pattern.exec('Hello Student');
var input_regex2 = input_pattern.test('you can learn');
var input_regex3 = input_pattern.test('ur new subject');
var regex_ele = document.getElementById("regex_information");
regex_ele.innerHTML = " Hello Student : "+input_regex1+"<br> you can learn : "+input_regex2+" <br> ur new subject : "+input_regex3
}
</script>
</body>
</html>

Output

The output shows the Unicode character of the hexadecimal input string.

$JavaScript \uxxxx RegExp Metacharacter$

Example4: use the match method with the regex

The example matches the hexadecimal value of the string with the global modifier.

<!DOCTYPE html>
<html>
<head>
<title>
JavaScript RegExp \uxxx (hexadecimal) Metacharacter
</title>
</head>
<body>
<h3>
JavaScript RegExp \uxxx (hexadecimal) Metacharacter
</h3>
<h4> We can use the validation for the hexadecimal input values and shows in the Unicode character.
</h4>
<div id = "regex_information"></div>
<button onclick = "uni_display();"> Click Here!</button>
<script>
function uni_display() {
let input_pattern = /\u0075/g;
var input_val1 = 'Hello Student';
var input_val2 = 'you can learn;
var input_val3 = 'ur new subject';
var input_regex1 = input_val1.match(input_pattern);
var input_regex2 = input_val2.match(input_pattern);
var input_regex3 = input_val3.match(input_pattern);
var regex_ele = document.getElementById("regex_information");
regex_ele.innerHTML = " Hello Student : "+input_regex1+"<br> you can learn : "+input_regex2+" <br> ur new subject : "+input_regex3
}
</script>
</body>
</html>

Output

The output shows the given values Unicode in the hexadecimal format.

$JavaScript \uxxxx RegExp Metacharacter$

Conclusion

The user input values are converted and displayed in the Unicode character for the hexadecimal values. The hexadecimal values use four characters with the \u regular expression for user validation.

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