@babel/plugin-transform-regexp-modifiers
info
This plugin is included in @babel/preset-env, in ES2025.
Example
i modifier
input.js
// matches Aa and aa
const regex =/(?i:a)a/
will be transformed to
output.js
const regex =/(?:[Aa])a/
m modifier
input.js
// matches aa, a\naa, etc. but not a\na
const regex =/(?m:^a)a/
will be transformed to
output.js
const regex =/(?:(?:^|(?<=[\n\r\u2028\u2029]))a)a/
s modifier
input.js
// matches \na and aa, but not \n\n
const regex =/(?s:.)./
will be transformed to
output.js
const regex =/(?:[\s\S])./;
Multiple modifiers
You can also enable multiple modifiers:
// matches Aa, aa, A\naa, etc. but not A\na
const regex =/(?im:^a)a/
or disable them:
// matches Aa, aa, A\naa, etc. but not A\na
const regex =/^a(?-im:a)/im
This proposal only supports i, m and s as inline modifiers.
Installation
- npm
- Yarn
- pnpm
- Bun
npm install --save-dev @babel/plugin-transform-regexp-modifiers
yarn add --dev @babel/plugin-transform-regexp-modifiers
pnpm add --save-dev @babel/plugin-transform-regexp-modifiers
bun add --dev @babel/plugin-transform-regexp-modifiers
Usage
With a configuration file (Recommended)
babel.config.json
{
"plugins":["@babel/plugin-transform-regexp-modifiers"]
}
Via CLI
Shell
babel --plugins @babel/@babel/plugin-transform-regexp-modifiers script.js
Via Node.js API
JavaScript
require("@babel/core").transformSync(code,{
plugins:["@babel/plugin-transform-regexp-modifiers"],
});