Get selected value in dropdown list using JavaScript

How do I get the selected value from a dropdown list using JavaScript?

I tried the methods below, but they all return the selected index instead of the value:

var e = document.getElementById("ddlViewBy");
function show(){
  var as = document.forms[0].ddlViewBy.value;
  var strUser = e.options[e.selectedIndex].value;
  console.log(as, strUser);
}
e.onchange=show;
show();

<form>
  <select id="ddlViewBy">
    <option value="1">test1</option>
    <option value="2" selected="selected">test2</option>
    <option value="3">test3</option>
  </select>
</form>

Solution 1:

If you have a select element that looks like this:

<select id="ddlViewBy">
  <option value="1">test1</option>
  <option value="2" selected="selected">test2</option>
  <option value="3">test3</option>
</select>

Running this code:

var e = document.getElementById("ddlViewBy");
var strUser = e.value;

Would make strUser be 2. If what you actually want is test2, then do this:

var e = document.getElementById("ddlViewBy");
var strUser = e.options[e.selectedIndex].text;

Which would make strUser be test2

Solution 2:

Plain JavaScript:

var e = document.getElementById("elementId");
var value = e.options[e.selectedIndex].value;
var text = e.options[e.selectedIndex].text;

jQuery:

$("#elementId :selected").text(); // The text content of the selected option
$("#elementId :selected").val(); // The value of the selected option

AngularJS: (http://jsfiddle.net/qk5wwyct):

// HTML
<select ng-model="selectItem" ng-options="item as item.text for item in items">
</select>
<p>Text: {{selectItem.text}}</p>
<p>Value: {{selectItem.value}}</p>

// JavaScript
$scope.items = [{
  value: 'item_1_id',
  text: 'Item 1'
}, {
  value: 'item_2_id',
  text: 'Item 2'
}];

Solution 3:

var strUser = e.options[e.selectedIndex].value;

This is correct and should give you the value. Is it the text you're after?

var strUser = e.options[e.selectedIndex].text;

So you're clear on the terminology:

<select>
    <option value="hello">Hello World</option>
</select>

This option has:

• Index = 0
• Value = hello
• Text = Hello World

Solution 4:

The following code exhibits various examples related to getting/putting of values from input/select fields using JavaScript.

Source Link

Working Javascript & jQuery Demo

 <select id="Ultra" onchange="run()">  <!--Call run() function-->
     <option value="0">Select</option>
     <option value="8">text1</option>
     <option value="5">text2</option>
     <option value="4">text3</option>
</select><br><br>
TextBox1<br>
<input type="text" id="srt" placeholder="get value on option select"><br>
TextBox2<br>
<input type="text" id="rtt"  placeholder="Write Something !" onkeyup="up()">

The following script is getting the value of the selected option and putting it in text box 1

<script>
    function run() {
        document.getElementById("srt").value = document.getElementById("Ultra").value;
    }
</script>

The following script is getting a value from a text box 2 and alerting with its value

<script>
    function up() {
        //if (document.getElementById("srt").value != "") {
            var dop = document.getElementById("srt").value;
        //}
        alert(dop);
    }
</script>

The following script is calling a function from a function

<script>
    function up() {
        var dop = document.getElementById("srt").value;
        pop(dop); // Calling function pop
    }

    function pop(val) {
        alert(val);
    }?
</script>