Regular expressions - JavaScript

A regular expression is a sequence of characters that forms a search pattern. The search pattern can be used for text search and text replace operations.

Regular expression tester with syntax highlighting, PHP / PCRE & JS Support, contextual help, cheat sheet, reference, and searchable community patterns.

Validating the values submitted by the end-user during the submission of a form is known as form validation. Regular Expression is crucial in the process of ...

2023年8月3日 — Prerequisite. This article aims to show the reader how to validate a simple form using regular expressions(regex) in JavaScript.

In this tutorial you will see how to use regular expressions to validate. Through a list of examples , we will build a script to validate phone numbers ...

2011年7月6日 — The match can be used here, but if you look at performance, test performs 30% better when we just want to validate a string to match the regex ...

2023年12月13日 — Regular Expression can be defined as a stopper(pattern -match) to the values which are not correct i.e., “indicating an error while the end-user ...

2023年9月25日 — The test() method of RegExp instances executes a search with this regular expression for a match between a regular expression and a specified

5 天前 — Regular expressions are patterns used to match character combinations in strings. In JavaScript, regular expressions are also objects.

2015年8月14日 — I'm attempting to validate a field name to match a certain format in JavaScript using Regular Expressions. I need the string inputted to ...