ReasonML Quick Start Guide

Validating JSON strings 

The getItem binding defined in the previous section will return a string:

let unvalidated = DataPureReason.getItem("customers");

We can validate the JSON string like so:

let validated =  try (Js.Json.parseExn(unvalidated)) {  | _ => failwith("Error parsing JSON string")  };

If the JSON is not valid, it will generate a runtime error. At the end of the chapter, we'll learn how GraphQL can help improve this situation.