Is it bad to have If-instanceof-statements in Typescript

   selectAction: (actionEvent) => {
        if (action1 instanceof Action1) { 
            // action1 body implementation
        } else if (action2 instanceof Action2) {
            // action2 body implementation
        } 
    }

The above code snippet reflects that different types of action which does different functionalities.I have used if and else condition to check action.

I feel it's not a better solution since i might have more actions in future and my if-else ladder will keep growing and i need to update my code again when there is a change.

Any Idea in improving this specific scenario

Thanks in advance