자바스크립트 7: JSON

JSON

: JavaScript Object Notation

1. Object to JSON
: stringfy(obj)

let json = JSON.stringify(true);
console.log(json);

json = JSON.stringify(['apple', 'banana']);
console.log(json);

const rabbit = {
  name: 'tori',
  color: 'white',
  size: null,
  birthDate: new Date(),
  jump: function () {
    console.log(`${this.name} can jump!`);
  },
};

json = JSON.stringify(rabbit);
console.log(json);

json = JSON.stringify(rabbit, ['name', 'color', 'size']);
console.log(json);

json = JSON.stringify(rabbit, (key, value) => {
  console.log(`key: ${key}, value: ${value}`);
  return key === 'name' ? 'ellie' : value;
});
console.log(json);

2. JSON to Object
: parse(json)

json = JSON.stringify(rabbit);
console.log(json);
const obj = JSON.parse(json, (key, value) => {
  console.log(`key: ${key}, value: ${value}`);
  return key === 'birthDate' ? new Date(value) : value;
});
console.log(obj);
rabbit.jump();
// obj.jump();

console.log(rabbit.birthDate.getDate());
console.log(obj.birthDate.getDate());

유용한 사이트:
JSON Diff checker: http://www.jsondiff.com/
JSON Beautifier/editor: https://jsonbeautifier.org/
JSON Parser: https://jsonparser.org/
JSON Validator: https://tools.learningcontainer.com/json-validator/

출처: 드림코딩 자바스크립트 입문편