JavaScript Tutorial
JavaScript Regex: Uses, Methods, Examples
Table of Contents
- Introduction
- What is Regex in JavaScript?
- How to Create a Regex in JavaScript
- Regular Expression Object Properties
- Regular Expression Object Methods
- Use Cases of Regular Expressions
- How to Use Regular Expressions in JavaScript
FAQs about JavaScript Regex
A regular expression is a sequence of characters that forms a search pattern, used for matching and manipulating strings.
Flags modify the behavior of a regex. Common flags include:
g (global): Matches all occurrences.
i (ignore case): Makes the match case-insensitive.
m (multiline): Enables multiline matching.
\d matches any digit (0-9). For example, /\d+/ matches "123" in "abc123".
test() returns a boolean (true or false) if a match is found, while match() returns an array of matches.
. matches any single character except a newline. For example, /a.c/ matches "abc" or "a1c".
