How can I access a hover state in reactjs?

Question

I have a sidenav with a bunch of basketball teams. So I would like to display something different for each team when one of them is being hovered over. Also, I am using Reactjs so if I could have a variable that I could pass to another component that would be awesome.

Answer 1

React components expose all the standard Javascript mouse events in their top-level interface. Of course, you can still use :hover in your CSS, and that may be adequate for some of your needs, but for the more advanced behaviors triggered by a hover you'll need to use the Javascript. So to manage hover interactions, you'll want to use onMouseEnter and onMouseLeave. You then attach them to handlers in your component like so:

<ReactComponent
    onMouseEnter={() => this.someHandler}
    onMouseLeave={() => this.someOtherHandler}
/>

You'll then use some combination of state/props to pass changed state or properties down to your child React components.