react show button on mouse enter
Update the component's state to reflect whether the mouse is inside the component, then use the state value to conditionally render a button.
getInitialState() {
return {
isMouseInside: false
};
}
mouseEnter = () => {
this.setState({ isMouseInside: true });
}
mouseLeave = () => {
this.setState({ isMouseInside: false });
}
render() {
return (
<div onMouseEnter={this.mouseEnter} onMouseLeave={this.mouseLeave}>
{this.state.isMouseInside ? <button>Your Button</button> : null}
</div>
);
}
Inside the render function we use the conditional operator (?
) to return the button component if this.state.isMouseInside
is truthy.
There is another approach that uses a reusable render component that would make components 'hoverable' or 'revealable' - whatever makes sense.
class Hoverable extends Component {
constructor() {
super();
this.state = {
isMouseInside: false
};
}
mouseEnter = () => {
this.setState({ isMouseInside: true });
}
mouseLeave = () => {
this.setState({ isMouseInside: false });
}
render() {
return this.props.children(
this.state.isMouseInside,
this.mouseEnter,
this.mouseLeave
)
}
}
Then create the functional component that represents the hoverable element. E.g an album
const HoverableElement = props => (
<Hoverable>
{(isMouseInside, mouseEnter, mouseLeave) => (
<div className="menu-item">
<div onMouseEnter={mouseEnter} onMouseLeave={mouseLeave}>
<h2>{props.title}</h2>
</div>
{isMouseInside && props.children}
</div>
)}
</Hoverable>
)
Finally, use the HoverableElement to render a list of elements that will each be 'hoverable' e.g an array of albums
class HoverableElementsList extends Component {
render() {
return (
<div>
<HoverableElement title="First Menu">
<p>Some children content</p>
</HoverableElement>
</div>
)
}
}