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자바스크립트 JSON 참조


JSON ( 자바 스크립트 객체 표기법 ) _ _ _

JSON은 데이터를 저장하고 전송하기 위한 형식입니다.

JSON은 텍스트이며 텍스트는 어디에서나 전송할 수 있으며 모든 프로그래밍 언어로 읽을 수 있습니다.

JavaScript 객체는 JSON으로 변환될 수 있고 JSON은 JavaScript 객체로 다시 변환될 수 있습니다.

이렇게 하면 복잡한 구문 분석이나 번역 없이 데이터를 JavaScript 개체로 사용할 수 있습니다.

예시

JSON 보내기:

// a JavaScript object...:
var myObj = { "name":"John", "age":31, "city":"New York" };

// ...converted into JSON:
var myJSON = JSON.stringify(myObj);

// send JSON:
window.location = "demo_json.php?x=" + myJSON;

JSON에 대한 튜토리얼은 JSON 튜토리얼을 읽어 보세요 .


JSON 메서드

Method Description
parse() Parses a JSON string and returns a JavaScript object
stringify() Convert a JavaScript object to a JSON string

유효한 데이터 유형

JSON에서 값은 다음 데이터 유형 중 하나여야 합니다.

  • 문자열
  • 숫자
  • 객체(유효한 JSON 값 포함)
  • 배열
  • 참이나 거짓
  • 없는

JSON 값 은 다음 데이터 유형 중 하나일 수 없습니다 .

  • 기능
  • 날짜
  • 찾으시는 주소가 없습니다

더 많은 예

예시

JSON 수신:

// myJSON is text received in JSON format.
// Convert JSON into a JavaScript object:
var myObj = JSON.parse(myJSON);
document.getElementById("demo").innerHTML = myObj.name;

예시

localStorage를 사용하여 데이터를 JSON으로 저장

// Storing data:
myObj = { "name":"John", "age":31, "city":"New York" };
myJSON = JSON.stringify(myObj);
localStorage.setItem("testJSON", myJSON);

// Retrieving data:
text = localStorage.getItem("testJSON");
obj = JSON.parse(text);
document.getElementById("demo").innerHTML = obj.name;

JSON 튜토리얼 에서 JSON에 대해 자세히 알아보세요 .