@babel/plugin-transform-dotall-regex

What is @babel/plugin-transform-dotall-regex?

The @babel/plugin-transform-dotall-regex package is a plugin for Babel, a JavaScript compiler, that transforms regular expressions with the dotAll flag (s flag) to be compatible with environments that do not support this feature. The dotAll flag allows the dot (.) in regular expressions to match any character, including newline characters, which it normally does not match. This plugin ensures that code using the dotAll flag can run in environments that have not implemented this ES2018 feature.

What are @babel/plugin-transform-dotall-regex's main functionalities?

Transformation of dotAll regular expressions

This code demonstrates how a regular expression with the dotAll flag (s flag) is written. The @babel/plugin-transform-dotall-regex plugin would transform this expression into a form that can be executed in JavaScript environments that do not support the dotAll flag, ensuring compatibility.

"use strict";\n\nvar regex = /foo.bar/s;

Other packages similar to @babel/plugin-transform-dotall-regex

@babel/plugin-transform-unicode-regex

Similar to @babel/plugin-transform-dotall-regex, this plugin transforms Unicode regular expressions to be compatible with environments that do not support certain Unicode features in regular expressions. While @babel/plugin-transform-dotall-regex focuses on the dotAll flag, @babel/plugin-transform-unicode-regex deals with Unicode property escapes and other Unicode-related transformations.

regexpu-core

This package is a part of the regexpu library, which is a collection of tools to process regular expressions. It includes features for transforming ES2015 (ES6) Unicode regular expressions into equivalent ES5 syntax. While it covers a broader range of regular expression features than @babel/plugin-transform-dotall-regex, including the transformation of Unicode property escapes and flags like the dotAll flag, it serves a similar purpose in ensuring compatibility across different JavaScript environments.

README

@babel/plugin-transform-dotall-regex

Compile regular expressions using the s (dotAll) flag to ES5 that works in today’s environments.

Example

In

/./s

Out

/[\0-\uFFFF]/

In

/./su

Out

/[\0-\u{10FFFF}]/u

Here’s an online demo.

Installation

npm install --save-dev @babel/plugin-transform-dotall-regex

Usage

Via .babelrc (recommended)

.babelrc

{
  "plugins": ["@babel/plugin-transform-dotall-regex"]
}

Via CLI

$ babel --plugins @babel/plugin-transform-dotall-regex script.js

Via Node.js API

require('@babel/core').transform(code, {
  'plugins': ['@babel/plugin-transform-dotall-regex']
});

Author

Mathias Bynens