Select options كوليشن

HTML DOM Select ɗanin

تاكرى و فالو

options كوليشن تاكاللان سارى لى ليستو سكيلي ئىپتيئون collection.

Note:The elements in the collection are sorted in the order they appear in the source code.

Instance

Example 1

View how many options are in a specific dropdown list:

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

Goyan shi ɗaya kai

X kaiwa za yi jayayya:

4

Tip:More examples are provided below the page.

Syntax

selectObject.options

Property

Property Description
length

Return the number of <option> elements in the collection.

Note:This property is read-only
selectedIndex Set or return the index of the selected <option> element in the collection (starting from 0).

Method

Method Description
[index]

Return <option> element with specified index (starting from 0) from the collection.

Note:If the index number is out of range, return null.
[add(option[,index)] Add <option> element to the specified index in the collection. If the index is not specified, it will be inserted at the end of the collection.
item(index)

Return <option> element with specified index (starting from 0) from the collection.

Note:If the index number is out of range, return null.
namedItem(id)

Return <option> element with specified ID from the collection.

Note:If id If not found, return null.
remove(index) Remove <option> element with specified index from the collection.

Technical details

DOM version: Core Level 2 Document Object
Return value:

HTMLOptionsCollection object, wanda ke wakilta kaiyarin na all <option> na <select> element.

Kaiyarin na kowa suna kaiyewa dake a kaiyewa a kowa a kaninde kudi a kudiya.

More shirin

Shirin 2: [index]

Gani koyo na farko a kaninde tsakiya 0:

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

Goyan shi ɗaya kai

X kaiwa za yi jayayya:

Apple

Shirin 3: item(index)

Gani koyo na farko a kaninde tsakiya 0:

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

Goyan shi ɗaya kai

X kaiwa za yi jayayya:

Apple

Shirin 4: namedItem(id)

Gani koyo 'orange' a kaninde id na tsakiya:

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

Goyan shi ɗaya kai

X kaiwa za yi jayayya:

Orange

Shirin 5

A sakiya 'Kiwi' a kaninde “1” na tsakiya:

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

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Example 6

Gudan ɗaya na ɗauka da ɗauka ɗaya '1':

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

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Example 7

Gwajiyar dace sabuwar ɗaya kundin dama, kuma sabuwar alama za a ɗauka a ɗaya na ɗauka:

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

Goyan shi ɗaya kai

X kaiwa za yi jayayya:

Apple
Orange
Pineapple
Banana

Example 8

Zaɓi wani alama daga ɗaya kundin dama, kuma sabuwar alama za a ɗauka a ɗaya na ɗauka:

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

Goyan shi ɗaya kai

X kaiwa za yi jayayya:

Banana

Example 9

Duba ɗaya na kundin dama don saɓu alama a ɗaya kundin dama don saɓu alama:

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);
    }
  }
}

Goyan shi ɗaya kai

Browser Support Collection options Yes Yes Yes Yes Yes

HTML DOM Select ɗanin