Step 1: Install the module as dependency.
npm i reactjs-eventemitter
Step 2: Require the module.
import EventEmitter from "reactjs-eventemitter";
or
const EventEmitter = require("reactjs-eventemitter")
Step 3: Use the module.
// your app class
import React from 'react';
import Parent from "./parent";
import Child from "./child";
// here both parent and child are independent of each other
function App() {
return (
<div className="App">
<Parent /> // parent or sibling component
<Child /> // child or sibling component
</div>
);
}
export default App;
// parent class or sibling class
import React from 'react'
import EventEmitter from "reactjs-eventemitter";
export default function parent() {
EventEmitter.subscribe('buttonClick', event => {
console.log("button pressed inside child");
console.log(event)
})
return (
<div>
This is parent component
</div>
)
}
[!Warning] When using useEffect hook use subscribe inside useEffect otherwise it'll be called twice
import React, { useEffect } from 'react'
const EventEmitter = require("reactjs-eventemitter")
export default function Parent() {
useEffect(() => {
console.log("parent component loading...")
EventEmitter.subscribe('buttonClick', event => {
console.log(event)
})
EventEmitter.subscribe('buttonClick2', event => {
console.log(event)
})
EventEmitter.subscribe('buttonClick3', event => {
console.log(event)
})
})
return (
<div>
This is parent componetn
</div>
)
}
// child class or sibling class
import React from 'react'
import EventEmitter from "reactjs-eventemitter";
export default function child() {
return (
<div>
This is child componetn
<button onClick={(event) => EventEmitter.dispatch('buttonClick', event)}>
Press Me
</button>
</div>
)
}
Available Functions.
// publish the event (dispatch and emit both are same)
//for redux lovers
EventEmitter.dispatch('eventName', event);
//for angular lovers
EventEmitter.emit('eventName', event)
//subscribe the event
EventEmitter.subscribe('eventName', event => { //logic here })