# @babel/plugin-transform-dotall-regex > Compile regular expressions using [the `s` (`dotAll`) flag](https://github.com/tc39/proposal-regexp-dotall-flag) to ES5 that works in today’s environments. ## Example **In** ```js /./s ``` **Out** ```js /[\0-\uFFFF]/ ``` **In** ```js /./su ``` **Out** ```js /[\0-\u{10FFFF}]/u ``` [Here’s an online demo.](https://mothereff.in/regexpu#input=const+regex+%3D+/foo.bar/s%3B%0Aconsole.log%28%0A++regex.test%28%27foo%5Cnbar%27%29%0A%29%3B%0A//+%E2%86%92+true&dotAllFlag=1) ## Installation ```sh npm install --save-dev @babel/plugin-transform-dotall-regex ``` ## Usage ### Via `.babelrc` (recommended) `.babelrc` ```json { "plugins": ["@babel/plugin-transform-dotall-regex"] } ``` ### Via CLI ```sh $ babel --plugins @babel/plugin-transform-dotall-regex script.js ``` ### Via Node.js API ```js require('@babel/core').transform(code, { 'plugins': ['@babel/plugin-transform-dotall-regex'] }); ``` ## Author | [![twitter/mathias](https://gravatar.com/avatar/24e08a9ea84deb17ae121074d0f17125?s=70)](https://twitter.com/mathias "Follow @mathias on Twitter") | |---| | [Mathias Bynens](https://mathiasbynens.be/) |