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# regjsgen [![Build status][ci-img]][ci] [![Code coverage status][codecov-img]][codecov] > This is a fork of [bnjmnt4n/regjsgen](https://github.com/bnjmnt4n/regjsgen) with some additional patches. The end goal is to merge these patches upstream. > - [be866435](https://github.com/babel/regjsgen/commit/be86643508658c70ccb5bec8bc4e3dc2479cac62) _feat: support modifiers proposal_ ([bnjmnt4n/regjsgen#28](https://github.com/bnjmnt4n/regjsgen/pull/28)) Generate regular expressions from [regjsparser][regjsparser]’s AST. ## Installation ```sh npm i regjsgen ``` ## API ### `regjsgen.generate(ast)` This function accepts an abstract syntax tree representing a regular expression (see [regjsparser][regjsparser]), and returns the generated regular expression string. ```js const regjsparser = require('regjsparser'); const regjsgen = require('regjsgen'); // Generate an AST with `regjsparser`. let ast = regjsparser.parse(regex); // Modify AST // … // Generate `RegExp` string with `regjsgen`. let regex = regjsgen.generate(ast); ``` ## Support Tested in Node.js 10, 12, 14, and 16.<br> Compatible with regjsparser v0.7.0’s AST. [ci]: https://github.com/bnjmnt4n/regjsgen/actions [ci-img]: https://github.com/bnjmnt4n/regjsgen/workflows/Node.js%20CI/badge.svg [codecov]: https://codecov.io/gh/bnjmnt4n/regjsgen [codecov-img]: https://codecov.io/gh/bnjmnt4n/regjsgen/branch/master/graph/badge.svg [regjsparser]: https://github.com/jviereck/regjsparser