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# is-function [](https://ci.testling.com/grncdr/js-is-function) Is that thing a function? Use this module to find out. ## API ### module.exports = function isFunction(fn) -> Boolean Return `true` if `fn` is a function, otherwise `false`. ## Why not typeof fn === 'function' Because certain old browsers misreport the type of `RegExp` objects as functions. ## Acknowledgements I stole this from https://github.com/ljharb/object-keys ## License MIT