add string to parameter when parameter type is event react code example

Example 1: how to pass a value to a react funtion without immediately firing it

<button onClick={(e) => {
     this.clickMe(e, someParameter)
}}>Click Me!</button>

Example 2: get syntethicbaseevent and parameter in react

Try this:

<button onClick={(e) => clickMe(e, someParameter)}>Click Me!</button>

And in your function:

function clickMe(event, someParameter){
     //do with event
}