Undefined is not an object evaluating this.state.*

Question

I\'m having an issue with posting data to an express REST API I have using fetch in my react-native app. Here\'s my code:

/**
 * Sample React Na         


        

Answer 1

You should bind in your constructor not in the render function. In your constructor, just add:

this.addData = this.addDate.bind(this);

You can also use ES6 as another alternative:

addData = () => { ... }

That will work to as documented here: https://babeljs.io/blog/2015/06/07/react-on-es6-plus under the arrow function section.