title: isValidJSON tags: type,json,intermediate

Checks if the provided string is a valid JSON.

Use JSON.parse() and a try... catch block to check if the provided string is a valid JSON.

const isValidJSON = (str) => {
  try {
    JSON.parse(str);
    return true;
  } catch (e) {
    return false;
  }
};

isValidJSON('{"name":"Adam","age":20}'); // true
isValidJSON('{"name":"Adam",age:"20"}'); // false
isValidJSON(null); // true