@babel/helper-regex

What is @babel/helper-regex?

The @babel/helper-regex package is part of the Babel toolchain, designed to help with the manipulation and generation of regular expressions in JavaScript code transformations. It provides utility functions that simplify common tasks related to regular expressions, such as ensuring flags are unique and correctly ordered, which is particularly useful when developing custom Babel plugins that deal with code transformations involving regex patterns.

What are @babel/helper-regex's main functionalities?

Ensure regex flags are unique and correctly ordered

This feature allows developers to ensure that the flags passed to a RegExp object are unique and correctly ordered, avoiding runtime errors and ensuring consistent behavior across different environments.

const { hasRegexChars, regexify } = require('@babel/helper-regex');
const pattern = 'example';
const flags = 'gim';
const regex = regexify(pattern, flags); // Creates a RegExp object with unique, sorted flags

Other packages similar to @babel/helper-regex

xregexp

XRegExp provides augmented, extensible regular expressions. It offers additional syntax and features on top of the native JavaScript RegExp object, making it a more powerful and flexible option for complex regex operations. Compared to @babel/helper-regex, XRegExp focuses more on extending regex capabilities rather than assisting with code transformation tasks.

regexp-tree

regexp-tree is a toolkit for working with regular expressions in JavaScript. It allows parsing, transforming, optimizing, and generating regular expressions. This package offers a broader range of functionalities related to direct manipulation and analysis of regex patterns compared to @babel/helper-regex, which is more focused on assisting with Babel plugin development.

README

@babel/helper-regex

Helper function to check for literal RegEx

See our website @babel/helper-regex for more information.

Install

Using npm:

npm install --save-dev @babel/helper-regex

or using yarn:

yarn add @babel/helper-regex --dev