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81 lines
1.7 KiB
Markdown
81 lines
1.7 KiB
Markdown
<picture>
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<source media="(prefers-color-scheme: dark)" srcset="media/logo_dark.svg">
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<img alt="mimic-function logo" src="media/logo.svg" width="400">
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</picture>
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<br>
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> Make a function mimic another one
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Useful when you wrap a function in another function and you would like to preserve the original name and other properties.
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## Install
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```sh
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npm install mimic-function
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```
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## Usage
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```js
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import mimicFunction from 'mimic-function';
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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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mimicFunction(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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console.log(String(wrapper));
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//=> '/* Wrapped with wrapper() */\nfunction foo() {}'
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```
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## API
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### mimicFunction(to, from, options?)
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Modifies the `to` function to mimic the `from` function. Returns the `to` function.
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`name`, `displayName`, and any other properties of `from` are copied. The `length` property is not copied. Prototype, class, and inherited properties are copied.
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`to.toString()` will return the same as `from.toString()` but prepended with a `Wrapped with to()` comment.
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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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#### options
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Type: `object`
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##### ignoreNonConfigurable
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Type: `boolean`\
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Default: `false`
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Skip modifying [non-configurable properties](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyDescriptor#Description) instead of throwing an error.
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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 and other properties
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