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