How to return element in react class functions - reactjs

Question

How to return element in react class functions on a click. is it even possible?
class Item extends Component {
constructor(props) {
super(props);
this.itemInfo = this.itemInfo.bind(this);
}
itemInfo = () =>{
return <div> some info</div>
}
render(){
return(
<div>
<div onClick={this.itemInfo}> Click Here <div>
</div>
)
}
}

Answer 1

class Item extends React.Component {
state = {
showDiv: false
};
render() {
return (
<div>
<div
style={{ cursor: "pointer" }}
onClick={() =>
this.setState(prevState => ({
showDiv: !prevState.showDiv
}))
}
>
Click Me
</div>
{/*Show the INFO DIV ONLY IF THE REQUIRED STATE IS TRUE*/}
{this.state.showDiv && <InfoDiv />}
</div>
);
}
}
//This is the div which we want on click
var InfoDiv = () => (
<div style={{ border: "2px solid blue",borderRadius:10, padding: 20 }}>
<p> Long Text DIVLong Text DIVLong Text DIVLong Text DIVLong Text DIV </p>
</div>
);
ReactDOM.render(<Item />, document.getElementById("root"));
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<div id="root"></div>

Answer 2

You should do that in the state.
itemInfo = () =>{
this.setState({ component:<div> some info</div> });
}
and render the component like this
return(
<div>
<div onClick={this.itemInfo}> Click Here <div>
{this.state.component}
</div>
)

Answer 3

You can try something like this, using the state and conditional rendering:
class Item extends Component {
constructor(props) {
super(props)
this.state = {
showMore: false,
}
}
toggleShowMore = () => {
this.setState({ showMore: !this.state.showMore })
}
render() {
return (
<div>
<div onClick={this.toggleShowMore}>
{this.state.showMore ? 'Show less' : 'Show more'}
</div>
{this.state.showMore ? <div>some info</div> : null}
</div>
)
}
}

Answer 4

Here's how I would do it:
function ItemInfo() {
return(
<div>Some Info</div>
);
}
class Item extends Component {
constructor(props) {
super(props);
this.handleClick= this.handleClick.bind(this);
this.state = {
showInfo: false
}
}
handleClick() {
this.setState((prevState) => {showInfo: !prevState.showInfo});
}
render(){
return(
<div>
<div onClick={this.handleClick}> Click Here <div>
{ this.state.showInfo ?
<ItemInfo/>
: null }
</div>
)
}
}