react-push-channel

---

Context is to drill props down. React Push Channel drill props up.

createChannel(initialValue, reducer?, initialValueForReducer?)

creates a channel, with given initialValue(used for typing), and optional reducer. Reducer will be applied to all stored messages, producing the result.
createChannel return an object with 3 fields: - Collector - to collect all messages.

- `callback` - current value will be reported via callback.
- `[merge]` - enabled reducer on data. Ie merges everything into a single value. Otherwise would return last value.

- Push - put message into the channel

- any props from initialValue

- Pop - react the current active message

Use as React-helmet?

import {createChannel} from 'react-push-channel';

const helmet = createChannel({
  title: '',
  description: ''
});

// the root collector
<helmet.Collector 
  callback={helmet => this.setState({helmet})} // transfer reported info into the state 
  merge                                        // merge all data in reverse order 
>
   <helmet.Push title="Page Title"/>
   <helmet.Push description="Page description"/>
</helmet.Collector>

// or actually do the job

<helmet.Collector 
  callback={helmet => document.title=helmet.title} // actually SET THE TITLE! 
  merge                                         
>
   <helmet.Push title="Page Title"/>
   <helmet.Push description="Page description"/>
</helmet.Collector

React-Lock

This example uses reducer to basically calculate number or active locks, and Pop to read active value down the tree. ```js const Lock = createChannel({}, acc => acc + 1, 0);
this.setState({locked: !!locked})}> {locked => is {locked?'locked':'unlocked'}
MIT