Function createContextSubscriber

modules/index.js:51–87

(contextKey)

)

const createContextSubscriber = (contextKey) => (

  class Subscriber extends React.Component {

    static propTypes = {
      children: PropTypes.func
    }

    static contextTypes = {
      [contextKey]: PropTypes.object
    }

    constructor(props, context) {
      super()
      const emitter = context[contextKey]
      if (emitter) {
        this.state = {
          value: emitter.getInitialValue()
        }
        this.unsubscribe = emitter.subscribe((value) => {
          this.setState({ value })
        })
      } else {
        this.state = {}
      }
    }

    componentWillUnmount() {
      this.unsubscribe()
    }

    render() {
      return this.props.children(this.state.value)
    }

  }
)

export { createContextEmitter, createContextSubscriber }