JarCastingreact-event-listener
A React component for binding events on the global scope.
Installation
npm install react-event-listener
The problem solved
This module provides a declarative way to bind events to a global EventTarget. It's using the React lifecycle to bind and unbind at the right time.
Usage
import React, {Component} from 'react';
import EventListener, {withOptions} from 'react-event-listener';
class MyComponent extends Component {
handleResize = () => {
console.log('resize');
};
handleScroll = () => {
console.log('scroll');
};
handleMouseMove = () => {
console.log('mousemove');
};
render() {
return (
<div>
<EventListener
target="window"
onResize={this.handleResize}
onScroll={withOptions(this.handleScroll, {passive: true, capture: false})}
/>
<EventListener target={document} onMouseMoveCapture={this.handleMouseMove} />
</div>
);
}
}
Note on server-side rendering
When doing server side rendering, document and window aren't available. You can use a string as a target, or check that they exist before rendering the component.
Note on performance
You should avoid passing inline functions for listeners, because this creates a new Function instance on every render, defeating EventListener's shouldComponentUpdate, and triggering an update cycle where it removes its old listeners and adds its new listeners (so that it can stay up-to-date with the props you passed in).
Note on testing
In this issue from React, TestUtils.Simulate. methods won't bubble up to window or document. As a result, you must use document.dispatchEvent or simulate event using native DOM api.
See our test cases for more information.
License
MIT