encode-json

encode-json.js

function stringify(input) {
  if (!input) return "null";
  if (typeof(input) === 'string') return input;
  if (typeof(input) === 'number') return `"${input}"`;
  if (Array.isArray(input)) {
    let result = [];
    input.forEach(value => {
      result.push(stringify(value));
    });
    return `[${result}]`;
  }
  if (typeof(input) === 'object' && !Array.isArray(input)) {
    let temp = {};
    for (const [key,value] of Object.entries(input)) {
      temp[key] = stringify(value);
    }

    let result = [];
    for (const [key,value] of Object.entries(temp)) {
      result.push(`${key}: ${value}`);
    }

    return `{${result.join(', ')}}`;
  }
}

console.log(stringify("abc"));
console.log(stringify(9));
console.log(stringify(null));
console.log(stringify(["abc", 123, null, [5, [6]]]));
console.log(stringify({"foo": 9, "bar": null, "baz": {"cat": 22}}));