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https://github.com/camwest/react-slot-fill

Slot & Fill component for merging React subtrees together. Portal on steroids.
https://github.com/camwest/react-slot-fill

extensibility framework javascript react

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Slot & Fill component for merging React subtrees together. Portal on steroids.

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# react-slot-fill · [![CircleCI Status](https://circleci.com/gh/camwest/react-slot-fill.svg?style=shield&circle-token=:circle-token)](https://circleci.com/gh/camwest/react-slot-fill) [![Codacy Badge](https://api.codacy.com/project/badge/Coverage/e7c3e47817fc4a81baca16cdb9a78ac1)](https://www.codacy.com/app/cameron_4/react-slot-fill?utm_source=github.com&utm_medium=referral&utm_content=camwest/react-slot-fill&utm_campaign=Badge_Coverage) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](CONTRIBUTING.md)

![Image](images/slot-fill-logo.png)

Slot & Fill component for merging React subtrees together.

## Check out the [simple demo on glitch](https://rsf-demo.glitch.me/) ([view source](https://glitch.com/edit/#!/project/rsf-demo))

## Installation

```
npm install react-slot-fill --save
```

### Check out the examples locally

```
git clone https://github.com/camwest/react-slot-fill
cd react-slot-fill
npm start
```

## Usage

**Note** These examples use React Fiber Alpha

### Toolbar.js

```jsx
import { Slot, Fill } from 'react-slot-fill';

const Toolbar = (props) =>



export default Toolbar;

Toolbar.Item = (props) =>

{ props.label }

```

### Feature.js

```jsx
import Toolbar from './Toolbar';

const Feature = () =>
[

];
```

### App.js

```jsx
import Toolbar from './Toolbar';
import Feature from './Feature';

import { Provider } from 'react-slot-fill';

const App = () =>



ReactDOMFiber.render(
,
document.getElementById('root')
);
```

## Components

###

Creates a Slot/Fill context. All Slot/Fill components must be descendants of Provider. You may only pass a single descendant to `Provider`.

```typescript
interface Provider {
/**
* Returns instances of Fill react components
*/
getFillsByName(name: string): Fill[];
/**
* Return React elements that were inside Fills
*/
getChildrenByName(name: string): React.ReactChild[];
}
```

`getFillsByName` and `getChildrenByName` are really useful for testing Fill components.
See [src/lib/__tests/Provider.test.tsx](src/lib/__tests/Provider.test.tsx) for an example.

###

Expose a global extension point

```javascript
import { Slot } from 'react-slot-fill';
```

#### Props

```typescript
interface Props {
/**
* The name of the component. Use a symbol if you want to be 100% sue the Slot
* will only be filled by a component you create
*/
name: string | Symbol;

/**
* Props to be applied to the child Element of every fill which has the same name.
*
* If the value is a function, it must have the following signature:
* (target: Fill, fills: Fill[]) => void;
*
* This allows you to access props on the fill which invoked the function
* by using target.props.something()
*/
fillChildProps?: {[key: string]: any}

/**
* A an optional function which gets all of the current fills for this slot
* Allows sorting, or filtering before rendering. An example use-case could
* be to only show a limited amount of fills.
*
* By default Slot injects an unstyled `

` element. If you want greater
* control over presentation use this function.
*
* @example
*
* {(items) => {items}}
*
*/
children?: (fills) => JSX.Element
}
```

###

Render children into a Slot

```javascript
import { Fill } from 'react-slot-fill';
```

#### Props

```typescript
interface Props {
/**
* The name of the slot that this fill should be related to.
*/
name: string | Symbol

/**
* one or more JSX.Elements which will be rendered
*/
children: JSX.Element | JSX.Element[]
}
```

You can add additional props to the Fill which can be accessed in the parent node of the slot via fillChildProps.