how I can write this condition in javascript(Reactjs)

i recently start a calculator project with react. I create the project and it works fine but i just wanna add a new feature to it. i wanna when i click on a operation symbol (like "+", "-", "*", "/") if i click one more time and the operation that exist before that be the same (for example 1234+) when i click on "+" or "-" my code don't add it to the code and replace it with the before operation and also do that to "/" and "*"

I also attach the repository link so you can see my calculator source code by yourself. the repository of project source code