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JavaScript JSON parse() Metode


Contoh

Parsing string (ditulis dalam format JSON) dan kembalikan objek JavaScript:

var obj = JSON.parse('{"firstName":"John", "lastName":"Doe"}');

Lebih banyak contoh "Coba Sendiri" di bawah ini.


Definisi dan Penggunaan

Metode JSON.parse() mem-parsing string dan mengembalikan objek JavaScript.

String harus ditulis dalam format JSON.

Metode JSON.parse() secara opsional dapat mengubah hasil dengan sebuah fungsi.


Dukungan Peramban

Angka-angka dalam tabel menentukan versi browser pertama yang sepenuhnya mendukung metode ini.

Method
parse() 4.0 8.0 3.5 4.0 11.5

Sintaksis

JSON.parse(string, function)

Nilai Parameter

Parameter Description
string Required. A string written in JSON format
reviver function Optional. A function used to transform the result. The function is called for each item. Any nested objects are transformed before the parent.
  • If the function returns a valid value, the item value is replaced with the transformed value
  • If the function returns undefined, the item is deleted


Detail Teknis

Nilai Kembali: Objek JSON, atau Array
Versi JavaScript: ECMAScript 5

Lebih Banyak Contoh

Contoh

Cara menggunakan fungsi penyegar :

/*replace the value of "city" to upper case:*/
var text = '{ "name":"John", "age":"39", "city":"New York"}';
var obj = JSON.parse(text, function (key, value) {
  if (key == "city") {
    return value.toUpperCase();
  } else {
    return value;
  }
});

document.getElementById("demo").innerHTML = obj.name + ", " + obj.city;

Contoh

Parsing JSON diterima dari server:

var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
  if (this.readyState == 4 && this.status == 200) {
    var myObj = JSON.parse(this.responseText);
    document.getElementById("demo").innerHTML = myObj.name;
  }
};
xmlhttp.open("GET", "json_demo.txt", true);
xmlhttp.send();

Lihatlah json_demo.txt


Halaman Terkait

Tutorial JSON: Pengenalan JSON