如何在反应中从另一个组件调用组件引用？

Question

I use react-notification-system library, and found my code more or less like this.

import React from 'react';
import Notification from 'react-notification-system';

class Notif extends React.Component {

  constructor(props) {
    super(props);

    this.notificationSystem = null;
  }

  componentDidMount() {
    // how to export this?
    this.notificationSystem = this.refs.notificationSystem;
  }

  render() {
    return <Notification ref="notificationSystem" />;
  }

}

export default Notif;

How can I export that notificationSystem so I can use it everywhere?

Answer 1

Two ways:

1. Use global widget.

Just add a global widget as follow.

var _component

export function set(component) {
    _component = component
}

export function get() {
    return _component
}

And then in your AppComponent register it:

import {set} from './notify'
class App extends React.Component {
    componentDidMount() {
        set(this.refs.notificationSystem)
    }
}

In any other component, call it:

import {get} from './notify'
class AnyComponent extends React.Component {
    alert() {
        get().doSomething()
    }
}

2. Use react context to store it as a global props for all component.