Skip to content

Instantly share code, notes, and snippets.

@necolas
Last active January 1, 2024 17:32
  • Star 32 You must be signed in to star a gist
  • Fork 9 You must be signed in to fork a gist
Star You must be signed in to star a gist
Save necolas/1c494e44e23eb7f8c5864a2fac66299a to your computer and use it in GitHub Desktop.
Hover styles in React Native for Web
import { canUseDOM } from 'fbjs/lib/ExecutionEnvironment';
/**
* Touch devices emulate mouse events. This functions makes it possible to know
* if the current modality supports hover (including for multi-modality
* devices).
*/
const createHoverMonitor = () => {
let isHoverEnabled = false;
let lastTouchTime = 0;
function enableHover() {
if (isHoverEnabled || Date.now() - lastTouchTime < 500) {
return;
}
isHoverEnabled = true;
}
function disableHover() {
lastTouchTime = new Date();
if (isHoverEnabled) {
isHoverEnabled = false;
}
}
if (canUseDOM) {
document.addEventListener('touchstart', disableHover, true);
document.addEventListener('mousemove', enableHover, true);
}
return {
get isEnabled() {
return isHoverEnabled;
}
};
};
export default createHoverMonitor;
import createHoverMonitor from './createHoverMonitor';
import { element, func, oneOfType } from 'prop-types';
import React, { Component } from 'react';
const hover = createHoverMonitor();
/**
* Use:
* <Hoverable>
* {(hover) => <View style={hover && styles.hovered} />}
* </Hoverable>
*
* Example: https://imaginary-lycra.glitch.me/
* Example source: https://glitch.com/edit/#!/imaginary-lycra
*/
class Hoverable extends Component {
static displayName = 'Hoverable';
static propTypes = {
children: oneOfType([func, element]).isRequired,
onHoverIn: func,
onHoverOut: func
};
state = { isHovered: false };
_handleMouseEnter = e => {
if (hover.isEnabled && !this.state.isHovered) {
const { onHoverIn } = this.props;
if (onHoverIn) {
onHoverIn();
}
this.setState(() => ({ isHovered: true }));
}
};
_handleMouseLeave = e => {
if (this.state.isHovered) {
const { onHoverOut } = this.props;
if (onHoverOut) {
onHoverOut();
}
this.setState(() => ({ isHovered: false }));
}
};
render() {
const {
children,
/* eslint-disable */
onHoverIn,
onHoverOut
/* eslint-enable */
} = this.props;
const child = typeof children === 'function' ? children(this.state.isHovered) : children;
return React.cloneElement(React.Children.only(child), {
onMouseEnter: this._handleMouseEnter,
onMouseLeave: this._handleMouseLeave
});
}
}
export default Hoverable;
@brunolemos
Copy link

Updated version on CodeSandbox: https://codesandbox.io/s/o9q8vy70l5

@horacioh
Copy link

@victorbutler
Copy link

@horacioh

version with Hooks: https://codesandbox.io/s/react-native-hover-hooks-version-4oxpp

Very neat solution! Did anyone notice that after a click, the hover effect isn't performing anymore? Cool tricks!

@MahmoudShaeer
Copy link

gd

@ianmartorell
Copy link

@horacioh

version with Hooks: https://codesandbox.io/s/react-native-hover-hooks-version-4oxpp

Very neat solution! Did anyone notice that after a click, the hover effect isn't performing anymore? Cool tricks!

I did! But I'm running almost the exact same code on a project and it's working great even after clicks.

@tomByrer
Copy link

tomByrer commented Aug 8, 2020

I did! But I'm running almost the exact same code on a project and it's working great even after clicks.

Could you share your improved version (or atleast the changes) please @ianmartorell?

@ianmartorell
Copy link

Could you share your improved version (or atleast the changes) please @ianmartorell?

Definitely! I don't really remember but I think the only thing I added were Typescript types really.

https://gist.github.com/ianmartorell/32bb7df95e5eff0a5ee2b2f55095e6a6

@roryabraham
Copy link

roryabraham commented Feb 12, 2021

I've been using a version of this for a while, and it's been great! But it doesn't play nice with modals:

  1. I'm hovering over a component
  2. Click a button to open a modal
  3. Click outside the modal to close it
  4. The Hoverable is stuck in the wrong state because onHoverOut is never called, but my mouse is no longer hovering it.

Has anyone run into this? Any clever ideas for a solution?

Here's my implementation btw: https://github.com/Expensify/Expensify.cash/tree/3a59fc2d212c9dc6af9eab1292e48d1cacaafbc3/src/components/Hoverable

EDIT: Found a solution that works for me:

https://gist.github.com/roryabraham/65cd1d2d5e8a48da78fec6a6e3105398

@ianmartorell
Copy link

I actually don't have that problem at all, using React Native Paper's Dialog.

Hoverable.mov

@nandorojo
Copy link

Here's my version, which uses TypeScript, hooks, and Reanimated shared values instead of re-renders: https://gist.github.com/nandorojo/066ff2f40419b7e06054cc7282e24f8d

@thirsty-wing
Copy link

In the code I'm working in, the render props pattern is something that is used seldomly. Instead a Pressable is used as a controlled component like so:

const [isHovered, setIsHovered] = useState(false);

return (
  <Pressable
    onHoverIn={() => setIsHovered(true)}
    onHoverOut={() => setisHovered(false)}
    style={ isHovered ? { backgroundColor: 'blue' } : {} }
  >
   ...
  </Pressable>
);

In this case, I was able to replace the onHoverIn and onHoverOut props with onMouseEnter and onMouseLeave and it works like a charm on react-native-web.

const [isHovered, setIsHovered] = useState(false);

return (
  <Pressable
    onMouseEnter={() => setIsHovered(true)}
    onMouseLeave={() => setisHovered(false)}
    style={ isHovered ? { backgroundColor: 'blue' } : {} }
  >
   ...
  </Pressable>
);

@nandorojo
Copy link

I think onHoverIn/Out is a better version of that which accounts for other conditions.

@thirsty-wing
Copy link

@nandorojo If you look closely at the gist, you will see that the hover is accomplished using the same approach. Only instead of appending the onMouseEnter and onMouseLeave props to the child and rendering the child using the render props pattern, the example I shared adds onMouseEnter and onMouseLeave explicitly.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment