How do I call an event for another component in React? - reactjs

Question

I've been working in react for about.. 2 days. 3/4's of that was me trying to get react to work with my current Asp.net MVC WebApp.
I have 2 classes. Everything is working fine, but I want the handleScan of Camera to call the handleHideClick() of ShowScanner. Whats the proper way to do that?
Here is my code:
import React from 'react';
import QrReader from 'react-qr-reader';
import { unmountComponentAtNode, render } from "react-dom";
class Camera extends React.Component {
state = {
result: 'No result'
}
handleScan = data => {
if (data) {
this.setState({
result: data
});
scanDataProcessor(this.state.result);
unmountComponentAtNode(document.getElementById('root'));
// *** Replace unmount above with a call to execute: ShowScanner.handleHideClick()
}
}
handleError = err => {
console.error(err)
}
render() {
return (
<div id="scanner" class="">
<QrReader
delay={300}
onError={this.handleError}
onScan={this.handleScan}
style={{ width: '100%' }}
/>
</div>
)
}
}
class ShowScanner extends React.Component {
constructor(props) {
super(props);
this.handleShowClick = this.handleShowClick.bind(this);
this.handleHideClick = this.handleHideClick.bind(this);
this.state = { showCamera: false }
}
handleShowClick() {
this.setState({ showCamera: true });
render(<Camera />, document.getElementById('root'));
}
handleHideClick() {
this.setState({ showCamera: false });
unmountComponentAtNode(document.getElementById('root'));
}
render() {
const showCamera = this.state.showCamera;
let button;
if (showCamera) {
return (
<button id="btnScan" type="button" class="btn btn-primary p-1" onClick={this.handleHideClick}>
<i class="bi bi-qr-code-scan"></i>
<br />Scan
</button>
);
} else {
return (
<button id="btnScan" type="button" class="btn btn-primary p-1" onClick={this.handleShowClick}>
<i class="bi bi-qr-code-scan"></i>
<br />Scan
</button>
);
}
}
}
render(<ShowScanner />, document.getElementById('scanBtn'));
At the very least, I need to reset the button so that when they click it, it remounts the Camera component without them having to click it twice.
Thanks in advance!