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Pilih opsi Koleksi

Pilih Objek

Contoh

Cari tahu berapa banyak opsi yang ada dalam daftar drop-down tertentu:

var x = document.getElementById("mySelect").options.length;

Hasil dari x menjadi:

4

Lebih banyak contoh "Coba Sendiri" di bawah ini.


Definisi dan Penggunaan

Koleksi opsi mengembalikan koleksi semua elemen <option> dalam daftar drop-down.

Catatan: Elemen dalam koleksi diurutkan seperti yang muncul di kode sumber.


Dukungan Peramban

Collection
options Yes Yes Yes Yes Yes

Sintaksis

selectObject.options

Properti

Property Description
length Returns the number of <option> elements in the collection.

Note: This property is read-only
selectedIndex Sets or returns the index of the selected <option> element in the collection (starts at 0)

Metode

Method Description
[index] Returns the <option> element from the collection with the specified index (starts at 0).

Note: Returns null if the index number is out of range
[add(option[,index])] Adds an <option> element into the collection at the specified index. If no index is specified, it inserts the option at the end of the collection
item(index) Returns the <option> element from the collection with the specified index (starts at 0).

Note: Returns null if the index number is out of range
namedItem(id) Returns the <option> element from the collection with the specified id.

Note: Returns null if the id does not exist
remove(index) Removes the <option> element with the specified index from the collection


Detail Teknis

Versi DOM: Objek Dokumen Tingkat 2 Inti
Nilai Kembali: Objek HTMLOptionsCollection, mewakili semua elemen <option> dalam elemen <select>. Elemen-elemen dalam koleksi diurutkan seperti yang muncul dalam kode sumber

Lebih Banyak Contoh

Contoh

[ indeks ]

Dapatkan teks dari opsi pertama (indeks 0) dalam daftar drop-down:

var x = document.getElementById("mySelect").options[0].text;

Hasil dari x menjadi:

Apple

Contoh

barang ( indeks )

Dapatkan teks dari opsi pertama (indeks 0) dalam daftar drop-down:

var x = document.getElementById("mySelect").options.item(0).text;

Hasil dari x menjadi:

Apple

Contoh

bernamaItem( id )

Dapatkan teks opsi dengan id="orange" dalam daftar drop-down:

var x = document.getElementById("mySelect").options.namedItem("orange").text;

Hasil dari x menjadi:

Orange

Contoh

Tambahkan opsi "Kiwi" pada posisi indeks "1" dalam daftar drop-down:

var x = document.getElementById("mySelect");
var c = document.createElement("option");
c.text = "Kiwi";
x.options.add(c, 1);

Contoh

Hapus opsi dengan indeks "1" dari daftar drop-down:

var x = document.getElementById("mySelect");
x.options.remove(1);

Contoh

Ulangi semua opsi dalam daftar drop-down, dan keluarkan teks dari setiap opsi:

var x = document.getElementById("mySelect");
var txt = "";
var i;
for (i = 0; i < x.length; i++) {
  txt = txt + x.options[i].text + "<br>";
}

Hasil dari txt akan menjadi:

Apple
Orange
Pineapple
Banana

Contoh

Pilih opsi di daftar drop-down dan keluarkan teks dari opsi yang dipilih dalam elemen dengan id="demo":

var x = document.getElementById("mySelect");
var i = x.selectedIndex;
document.getElementById("demo").innerHTML = x.options[i].text;

Hasilnya bisa berupa:

Banana

Contoh

Ubah opsi dalam daftar drop-down tergantung pada opsi yang dipilih di daftar drop-down lain:

var carsAndModels = {};
carsAndModels['VO'] = ['V70', 'XC60', 'XC90'];
carsAndModels['VW'] = ['Golf', 'Polo', 'Scirocco', 'Touareg'];
carsAndModels['BMW'] = ['M6', 'X5', 'Z3'];

function ChangeCarList() {
  var carList = document.getElementById("car");
  var modelList = document.getElementById("carmodel");
  var selCar = carList.options[carList.selectedIndex].value;

  while (modelList.options.length) {
    modelList.remove(0);
  }

  var cars = carsAndModels[selCar];
  if (cars) {
    var i;
    for (i = 0; i < cars.length; i++) {
      var car = new Option(cars[i], i);
      modelList.options.add(car);
    }
  }
}

Pilih Objek