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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)
It will modify `to` and return it.
#### to
Type: `Function`
Mimicking function.
#### from
Type: `Function`
Function to mimic.
## Related
- [rename-fn](https://github.com/sindresorhus/rename-fn) - Rename a function
## License
MIT © [Sindre Sorhus](https://sindresorhus.com)
