Just a question. Why would you create a new button component when the only thing it does is return a <button> html element with text inside. Why not just do {listitems.map(listitem) => {return (<button> {listitem.text}</button)}}. I think react facilitates unnecessary boiler plate logic like that. When in reality a component should probably do more in order to save code if it's going to be created at all. Just my opinion. Open to other people's thoughts on this.
It's one time per search. But I can definitely build in a function where it would run in the background. That's something i'll keep in mind for the second iteration.