Browser back button using React

Question

I am using React. I want to warn the user when the user clicks on the back button.

What I had done was

handleWindowClose = (ev) => {
    ev.preventD         


        

Answer 1

Try this code:

componentDidMount() {
    window.addEventListener("popstate", this.onBackButtonEvent)
}

componentWillUnmount() {
  window.removeEventListener("popstate", this.onBackButtonEvent)
}

onBackButtonEvent = () => {
    window.history.forward()
}