30秒学会 JavaScript 片段 – String is valid JSON

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.

代码实现

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

翻译自：https://www.30secondsofcode.org/js/s/is-valid-json