Parse data from JSON in ReactJS
React lives in JavaScript. So parsing a JSON string is done with:
var myObject = JSON.parse(myjsonstring);How to fetch a file from somewhere with AJAX is a different question.
You could use fetch() for this. See for example
https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API or
https://davidwalsh.name/fetch or
https://blog.gospodarets.com/fetch_in_action