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- # mimic-fn [](https://travis-ci.org/sindresorhus/mimic-fn)
- > Make a function mimic another one
- Useful when you wrap a function in another function and like to preserve the original name and other properties.
- ## Install
- ```
- $ npm install mimic-fn
- ```
- ## Usage
- ```js
- const mimicFn = require('mimic-fn');
- function foo() {}
- foo.unicorn = '🦄';
- function wrapper() {
- return foo();
- }
- console.log(wrapper.name);
- //=> 'wrapper'
- mimicFn(wrapper, foo);
- console.log(wrapper.name);
- //=> 'foo'
- console.log(wrapper.unicorn);
- //=> '🦄'
- ```
- ## API
- It will copy over the properties `name`, `length`, `displayName`, and any custom properties you may have set.
- ### mimicFn(to, from)
- Modifies the `to` function and returns it.
- #### to
- Type: `Function`
- Mimicking function.
- #### from
- Type: `Function`
- Function to mimic.
- ## Related
- - [rename-fn](https://github.com/sindresorhus/rename-fn) - Rename a function
- - [keep-func-props](https://github.com/ehmicky/keep-func-props) - Wrap a function without changing its name, length and other properties
- ## License
- MIT © [Sindre Sorhus](https://sindresorhus.com)
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