How to convert a JSON-like (not JSON) string to an object?

Question

We all know we can use JSON.parse() to convert the string \'{\"a\":0,\"b\":\"haha\"}\' to the object {a: 0, b: \'haha\'}.

But can

Answer 1

As eval() has security flaws, it's better not to use it. A possible way would be creating a own parser to convert it to JSON string and then apply JSON.parse(). Something like below

function toJSONString(input) {
   const keyMatcher = '([^",{}\\s]+?)';
   const valMatcher = '(.,*)';
   const matcher = new RegExp(`${keyMatcher}\\s*:\\s*${valMatcher}`, 'g');
   const parser = (match, key, value) => `"${key}":${value}`
   return input.replace(matcher, parser);
}

JSON.parse(toJSONString('{a: 0, b: "haha"}'))