npm i wasm-re2

import { RE2 } from 'wasm-re2';

const regex = new RE2('(b|^a)', 'g');

const isFound = regex.test('aabc');
// true

const matches = regex.exec('aabc');
// [ ['a', 'a'], ['b', 'b'] ]

Executes a search for a match between a regular expression and a specified string.

Returns true or false.

Returns all matches of the regular expression against a string.

Works like non-iterable RegExp matchAll.

Exec returns all results in a 2D array where each result consists of [fullmatch, ...captureMathces].

Example:

const regex = new RE2('(abc)\\d+(zxc)', 'g');

regex.exec('123abc123zxc123abc123zxc123')
// [ ['abc123zxc', 'abc', 'zxc'], ['abc123zxc', 'abc', 'zxc'] ]

Return a new string with some or all matches of a pattern replaced by a replacement.

Returns number of capture groups.

If you use mac proceed to Pull submodule google-re2. You need node and python to be installed.

Install Debian from Microsoft Store, then launch and create UNIX user.

Enter new UNIX username:
New password:
Retype new password:

Then launch:

sudo apt-get update -y && sudo apt-get install nodejs npm git python -y

Install Subsystem WSL using Setting on Windows 10:

1. Open Settings.
2. Click on Apps.
3. Under the Related settings section, click the Programs and Features option.
4. Click the Turn Windows features on or off option on the left pane.
5. Check the Windows Subsystem for the Linux checkbox.
6. Click the OK button.
7. Then you need to reboot the PC.

Launch IDE with WSL, and do all next actions in WSL Terminal.

git submodule update --init

git clone https://github.com/emscripten-core/emsdk.git

cd emsdk

git pull

./emsdk install latest

./emsdk activate latest

from emsdk dir: source ./emsdk_env.sh

from re2: source ../emsdk/emsdk_env.sh

npm i

npm run foundation

Run script npm run compile

npm test

git pull --recurse-submodules

npm run build:update

To change rollup configuration read Rollup_FAQ.md in yaml-core package or visit https://rollupjs.org/guide/en/.