96 lines
1.6 KiB
Markdown
96 lines
1.6 KiB
Markdown
# auto-bind [](https://travis-ci.org/sindresorhus/auto-bind)
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> Automatically bind methods to their class instance
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## Install
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```
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$ npm install auto-bind
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```
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## Usage
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```js
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const autoBind = require('auto-bind');
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class Unicorn {
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constructor(name) {
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this.name = name;
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autoBind(this);
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}
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message() {
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return `${this.name} is awesome!`;
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}
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}
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const unicorn = new Unicorn('Rainbow');
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// Grab the method off the class instance
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const message = unicorn.message;
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// Still bound to the class instance
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message();
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//=> 'Rainbow is awesome!'
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// Without `autoBind(this)`, the above would have resulted in
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message();
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//=> Error: Cannot read property 'name' of undefined
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```
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## API
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### autoBind(self, [options])
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Bind methods in `self` to their class instance. Returns the `self` object.
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#### self
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Type: `Object`
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Object with methods to bind.
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#### options
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Type: `Object`
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##### include
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Type: `Array<string|RegExp>`
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Bind only the given methods.
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##### exclude
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Type: `Array<string|RegExp>`
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Bind methods except for the given methods.
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### autoBind.react(self, [options])
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Same as `autoBind`, but excludes the default [React component methods](https://reactjs.org/docs/react-component.html).
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```js
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class Foo extends React.Component {
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constructor(props) {
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super(props);
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autoBind.react(this);
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}
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// …
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}
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```
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## Related
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- [bind-methods](https://github.com/sindresorhus/bind-methods) - Bind all methods in an object to itself or a specified context
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## License
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MIT © [Sindre Sorhus](https://sindresorhus.com)
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