Category Archive for "Regex"

How can I validate an email address using a regular expression?

Validating email addresses is a common task in web development. Email validation ensures that the email entered by the user conforms to a specific format and contains a valid domai...

How to Validate an Email Address in JavaScript

Email validation is an important aspect of web development, as it ensures that the data submitted by users is in the correct format and reduces the risk of errors. In this article,...

What is a non-capturing group in regular expressions?

A regular expression is a sequence of characters that define a search pattern. It is commonly used in string matching operations to perform tasks such as finding specific patterns...

Regular Expression to Match a Line That Doesn't Contain a Word

A regular expression is a powerful tool for pattern matching and searching within text. It allows you to define a pattern and then search for matches within a given input string. I...

How to Validate Phone Numbers Using Regex

Phone number validation is a common task in many applications. Whether it's for user registration, form submissions, or data processing, ensuring that the phone number is in the co...

What special characters must be escaped in regular expressions?

: Regular expressions (regex) are powerful tools used to match and manipulate strings based on patterns. They are widely used in programming, text processing, and data...

Is there a RegExp.escape function in JavaScript?

In JavaScript, regular expressions (regex) are used to search, match, and manipulate text strings. When dealing with special characters in a string that needs to be u...

What is the best regular expression to check if a string is a valid URL?

In today's digital age, URLs (Uniform Resource Locators) have become an integral part of our lives. Whether it's to share a website link, navigate through web pages, or even as inp...

How to Match Any Character Across Multiple Lines in a Regular Expression

The Problem Regular expressions (regex) are a powerful tool used for pattern matching in strings. However, they have a default behavior where they do not match newline characters...

How to Use a Variable in a Regular Expression

Regular expressions are an extremely powerful tool for pattern matching and string manipulation. In JavaScript, regular expressions are represented by the RegExp obje...