# is-generator-fn [](https://travis-ci.org/sindresorhus/is-generator-fn) > Check if something is a [generator function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function*) ## Install ``` $ npm install is-generator-fn ``` ## Usage ```js const isGeneratorFn = require('is-generator-fn'); isGeneratorFn(function * () {}); //=> true isGeneratorFn(function () {}); //=> false ``` ## Related - [is](https://github.com/sindresorhus/is) - Type check values ## License MIT © [Sindre Sorhus](https://sindresorhus.com)