Type 'void' is not assignable to type '((event: MouseEvent) => void) | undefined'

Question

   import * as React from \"react\";
   import \"./App.css\";
   import PageTwo from \"./components/PageTwo\";

    export interface IPropsk {
        data?: Array&l         


        

Answer 1

In your code this.fetchData("dfd") you are calling the function. The function returns void. void is not assingable to onClick which expects a function.

Fix

Create a new function that calls fetchData e.g. onClick={() => this.fetchData("dfd")}.

More

This is a very common error prevented by TypeScript