JavaScript-RegExp

JavaScript - How to Use a Variable in Regular Expression?

JavaScript-Questions

JavaScript-Program

Last Updated: 04 December 2024

To dynamically create a regular expression (RegExp) in JavaScript using variables, you can use the RegExp constructor. Here are the various ...read more

JavaScript - How to Validate Form Using Regular Expression?

Last Updated: 03 December 2024

To validate a form in JavaScript, you can use Regular Expressions (RegExp) to ensure that user input follows the correct format. In this art ...read more

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JavaScript - How to Mask All Characters Except the Last?

Last Updated: 07 December 2024

Here are the different methods to replace characters except the last with the specified mask character in JavaScript.1. Using slice() and re ...read more

JavaScript - How to Replace Line Breaks With 'br' Tag?

Last Updated: 06 December 2024

Here are the different methods to replace line breaks with br tag in JavaScript.1. Using replace() with Regular ExpressionThe regular expres ...read more

JavaScript RegExp Reference

Last Updated: 05 December 2024

RegExp stands for Regular Expression. A regular expression is a sequence of characters that forms a search pattern. The search pattern can b ...read more

How to Validate Email Address using RegExp in JavaScript?

Last Updated: 15 April 2025

Validating an email address in JavaScript is essential for ensuring that users input a correctly formatted email. Regular expressions (RegEx ...read more

JavaScript - How To Check if String Contains Only Digits?

Last Updated: 06 December 2024

A string with only digits means it consists solely of numeric characters (0-9) and contains no other characters or symbols. Here are the dif ...read more

JavaScript - Validate URL in JS

Last Updated: 16 January 2025

We will explore different approaches to validating URLs in JavaScript. These approaches include using regular expressions (regex), the URL c ...read more

JavaScript RegExp exec() Method

Last Updated: 05 December 2024

The RegExp.exec() method in JavaScript allows you to search for a pattern in a string and retrieve detailed information about the match. Unl ...read more

JavaScript RegExp test() Method

Last Updated: 28 November 2024

The RegExp test() Method in JavaScript is used to test for match in a string. If there is a match this method returns true else it returns f ...read more

JavaScript RegExp \s Metacharacter

Last Updated: 06 December 2024

The \s metacharacter in JavaScript regular expressions matches any whitespace character. This includes spaces, tabs, form feeds, line breaks ...read more

JavaScript RegExp [0-9] Expression

Last Updated: 06 December 2024

The [0-9] expression in JavaScript regular expressions matches any single digit between 0 and 9. It is a character class used to represent a ...read more

JavaScript RegExp \W Metacharacter

Last Updated: 06 December 2024

The \W metacharacter in JavaScript regular expressions matches any character that is not a word character. A word character is defined as:An ...read more