30-seconds-of-code/isValidJSON.md at c6279b0af7a56a9f46720af9183f97398a65c754

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Larry Lu 5ecda00b33 Make description and example better

2018-12-04 12:43:44 +08:00

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