Trying To Block Users From Leaving Page Before Selecting Answer In React

I have a question component and am trying to prevent users from leaving a page before selecting an answer. this is my question component import React, { Component } from 'react'; i

Solution 1:

@jdip88, in the first glance, I can see you have not defined initial state correctly.

Can you please replace the following section and test it:

constructor(props){ super(props); this.state={score: '',} }

Solution 2:

If you read the error message carefully, you can deduce that this.state is null, not this.state.score like you mentioned - it is saying that score is a property of null. As the other answer suggests, define an initial state in your constructor and go from there.