How do I get the selected value from a dropdown list using JavaScript?
<form>
<select id="ddlViewBy">
<option value="1">test1</option>
<option value="2" selected="selected">test2</option>
<option value="3">test3</option>
</select>
</form>
Given 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 value = e.value;
var text = e.options[e.selectedIndex].text;
Results in:
value == 2
text == "test2"
Interactive example:
var e = document.getElementById("ddlViewBy");
function onChange() {
var value = e.value;
var text = e.options[e.selectedIndex].text;
console.log(value, text);
}
e.onchange = onChange;
onChange();
<form>
<select id="ddlViewBy">
<option value="1">test1</option>
<option value="2" selected="selected">test2</option>
<option value="3">test3</option>
</select>
</form>
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").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'
}];
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
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>
var selectedValue = document.getElementById("ddlViewBy").value;
If you ever run across code written purely for Internet Explorer you might see this:
var e = document.getElementById("ddlViewBy");
var strUser = e.options(e.selectedIndex).value;
Running the above in Firefox et al will give you an 'is not a function' error, because Internet Explorer allows you to get away with using () instead of []:
var e = document.getElementById("ddlViewBy");
var strUser = e.options[e.selectedIndex].value;
The correct way is to use square brackets.
Use:
<select id="Ultra" onchange="alert(this.value)">
<option value="0">Select</option>
<option value="8">text1</option>
<option value="5">text2</option>
<option value="4">text3</option>
</select>
Any input/form field can use a “this” keyword when you are accessing it from inside the element. This eliminates the need for locating a form in the DOM tree and then locating this element inside the form.
There are two ways to get this done either using JavaScript or jQuery.
JavaScript:
var getValue = document.getElementById('ddlViewBy').selectedOptions[0].value;
alert (getValue); // This will output the value selected.
OR
var ddlViewBy = document.getElementById('ddlViewBy');
var value = ddlViewBy.options[ddlViewBy.selectedIndex].value;
var text = ddlViewBy.options[ddlViewBy.selectedIndex].text;
alert (value); // This will output the value selected
alert (text); // This will output the text of the value selected
jQuery:
$("#ddlViewBy:selected").text(); // Text of the selected value
$("#ddlViewBy").val(); // Outputs the value of the ID in 'ddlViewBy'
Beginners are likely to want to access values from a select with the NAME attribute rather than ID attribute. We know all form elements need names, even before they get ids.
So, I'm adding the getElementsByName() solution just for new developers to see too.
NB. names for form elements will need to be unique for your form to be usable once posted, but the DOM can allow a name be shared by more than one element. For that reason consider adding IDs to forms if you can, or be explicit with form element names my_nth_select_named_x and my_nth_text_input_named_y.
Example using getElementsByName:
var e = document.getElementsByName("my_select_with_name_ddlViewBy")[0];
var strUser = e.options[e.selectedIndex].value;
Just use
$('#SelectBoxId option:selected').text(); for getting the text as listed
$('#SelectBoxId').val(); for getting the selected index value
I don't know if I'm the one that doesn't get the question right, but this just worked for me:
Use an onchange() event in your HTML, for example.
<select id="numberToSelect" onchange="selectNum()">
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>
</select>
JavaScript
function selectNum() {
var strUser = document.getElementById("numberToSelect").value;
}
This will give you whatever value is on the select dropdown per click.
Using jQuery:
$('select').val();
The previous answers still leave room for improvement because of the possibilities, the intuitiveness of the code, and the use of id versus name. One can get a read-out of three data of a selected option -- its index number, its value and its text. This simple, cross-browser code does all three:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Demo GetSelectOptionData</title>
</head>
<body>
<form name="demoForm">
<select name="demoSelect" onchange="showData()">
<option value="zilch">Select:</option>
<option value="A">Option 1</option>
<option value="B">Option 2</option>
<option value="C">Option 3</option>
</select>
</form>
<p id="firstP"> </p>
<p id="secondP"> </p>
<p id="thirdP"> </p>
<script>
function showData() {
var theSelect = demoForm.demoSelect;
var firstP = document.getElementById('firstP');
var secondP = document.getElementById('secondP');
var thirdP = document.getElementById('thirdP');
firstP.innerHTML = ('This option\'s index number is: ' + theSelect.selectedIndex + ' (Javascript index numbers start at 0)');
secondP.innerHTML = ('Its value is: ' + theSelect[theSelect.selectedIndex].value);
thirdP.innerHTML = ('Its text is: ' + theSelect[theSelect.selectedIndex].text);
}
</script>
</body>
</html>
Live demo: http://jsbin.com/jiwena/1/edit?html,output .
id should be used for make-up purposes. For functional form purposes, name is still valid, also in HTML5, and should still be used. Lastly, mind the use of square versus round brackets in certain places. As was explained before, only (older versions of) Internet Explorer will accept round ones in all places.
Another solution is:
document.getElementById('elementId').selectedOptions[0].value
The simplest way to do this is:
var value = document.getElementById("selectId").value;
You can use querySelector.
E.g.
var myElement = document.getElementById('ddlViewBy');
var myValue = myElement.querySelector('[selected]').value;
Running example of how it works:
var e = document.getElementById("ddlViewBy");
var val1 = e.options[e.selectedIndex].value;
var txt = e.options[e.selectedIndex].text;
document.write("<br />Selected option Value: "+ val1);
document.write("<br />Selected option Text: "+ txt);
<select id="ddlViewBy">
<option value="1">test1</option>
<option value="2">test2</option>
<option value="3" selected="selected">test3</option>
</select>
Note: The values don't change as the dropdown is changed, if you require that functionality then an onClick change is to be implemented.
To go along with the previous answers, this is how I do it as a one-liner. This is for getting the actual text of the selected option. There are good examples for getting the index number already. (And for the text, I just wanted to show this way)
let selText = document.getElementById('elementId').options[document.getElementById('elementId').selectedIndex].text
In some rare instances you may need to use parentheses, but this would be very rare.
let selText = (document.getElementById('elementId')).options[(document.getElementById('elementId')).selectedIndex].text;
I doubt this processes any faster than the two line version. I simply like to consolidate my code as much as possible.
Unfortunately this still fetches the element twice, which is not ideal. A method that only grabs the element once would be more useful, but I have not figured that out yet, in regards to doing this with one line of code.
I have a bit different view of how to achieve this. I'm usually doing this with the following approach (it is an easier way and works with every browser as far as I know):
<select onChange="functionToCall(this.value);" id="ddlViewBy">
<option value="value1">Text one</option>
<option value="value2">Text two</option>
<option value="value3">Text three</option>
<option value="valueN">Text N</option>
</select>
In 2015, in Firefox, the following also works.
e.options.selectedIndex
In more modern browsers, querySelector allows us to retrieve the selected option in one statement, using the :checked pseudo-class. From the selected option, we can gather whatever information we need:
const opt = document.querySelector('#ddlViewBy option:checked');
// opt is now the selected option, so
console.log(opt.value, 'is the selected value');
console.log(opt.text, "is the selected option's text");
<select id="ddlViewBy">
<option value="1">test1</option>
<option value="2" selected="selected">test2</option>
<option value="3">test3</option>
</select>
event.target.value inside the onChange callback did the trick for me.
Most answers here get the value of the "this" select menu onchange by a plain text JavaScript selector.
For example:
document.getElementById("ddlViewBy").value;
This is not a DRY approach.
DRY (three lines of code):
function handleChange(e) {
let innerText = e.target[e.target.options.selectedIndex].innerText;
let value = e.target.value;
/* Do something with these values */
}
Get the first select option:
console.log(e.target[0]); /* Output: <option value="value_hello">Hello innerText</option>*/
With this idea in mind, we dynamically return a "this" select option item (by selectedIndex):
e.target[e.target.options.selectedIndex].innerText;
Demo
let log = document.getElementById('log');
function handleChange(e) {
let innerText = e.target[e.target.options.selectedIndex].innerText;
let value = e.target.value;
log.innerHTML = `<table>
<tr><th>value</th><th>innerText</th></tr>
<tr><td>${value}</td><td>${innerText}</td></tr>
</table>`;
}
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/milligram/1.4.1/milligram.css">
<select id="greet" onchange="handleChange(event)">
<option value="value_hello">Hello innerText</option>
<option value="value_goodbye">Goodbye innerText</option>
<option value="value_seeYou">See you... innerText</option>
</select>
<select id="other_select_menu" onchange="handleChange(event)">
<option value="value_paris">Paris innerText</option>
<option value="value_ny">New York innerText</option>
</select>
<div id="log"></div>
Here is a JavaScript code line:
var x = document.form1.list.value;
Assuming that the dropdown menu named list name="list" and included in a form with name attribute name="form1".
I think you can attach an event listener to the select tag itself e.g:
<script>
document.addEventListener("DOMContentLoaded", (_) => {
document.querySelector("select").addEventListener("change", (e) => {
console.log(e.target.value);
});
});
</script>
In this scenario, you should make sure you have a value attribute for all of your options, and they are not null.
You should be using querySelector to achieve this. This also standardizes the way of getting a value from form elements.
var dropDownValue = document.querySelector('#ddlViewBy').value;
Fiddle: https://jsfiddle.net/3t80pubr/
Try
ddlViewBy.value // value
ddlViewBy.selectedOptions[0].text // label
console.log( ddlViewBy.value );
console.log( ddlViewBy.selectedOptions[0].text );
<select id="ddlViewBy">
<option value="1">Happy</option>
<option value="2">Tree</option>
<option value="3" selected="selected">Friends</option>
</select>
Here's an easy way to do it in an onchange function:
event.target.options[event.target.selectedIndex].dataset.name
<select name="test" id="test" >
<option value="1" full-name="Apple">A</option>
<option value="2" full-name="Ball">B</option>
<option value="3" full-name="Cat" selected>C</option>
</select>
var obj = document.getElementById('test');
obj.options[obj.selectedIndex].value; //3
obj.options[obj.selectedIndex].text; //C
obj.options[obj.selectedIndex].getAttribute('full-name'); //Cat
obj.options[obj.selectedIndex].selected; //true
There is a workaround, using the EasyUI framework with all of its plugins.
You only need to add some EasyUI object that can read from an input as a "bridge" to the drop-down menu.
Example: easyui-searchbox
To the left, the drop-down, to the right, the easyui-searchbox:
...
<input id="ss" class="easyui-searchbox" style="width:300px"
data-options=" searcher:my_function,
prompt:'Enter value',
menu:'#mm'">
<div id="mm" style="width:200px">
<div data-options="name:'1'">test1</div>
<div data-options="name:'2'">test2</div>
</div>
...
...
<script type="text/javascript">
function my_js_function(triggeredByButton = false){
// normal text of the searchbox (what you entered)
var value = $("#ss").searchbox("getValue");
// what you chose from the drop-down menu
var name = $("#ss").searchbox("getName");
...
Mind: the var name is the '1' or '2', that is, the "value of the drop-down", while var value is the value that was entered in the easyui-searchbox instead and not relevant if you only want to know the value of the drop-down.
I checked how EasyUI fetches that #mm name, and I could not find out how to get that name without the help of EasyUI. The jQuery behind getName:
getName:function(jq){
return $.data(jq[0],"searchbox").searchbox.find("input.textbox-value").attr("name");
}
Mind that the return of this function is not the value of the easyui-searchbox, but the name of the #mm drop-down that was used as the menu parameter of the easyui-searchbox. Somehow EasyUI must get that other value, therefore it must be possible.
If you do not want any plugin to be seen, make it as tiny as possible? Or find perhaps a plugin that does not need a form at all in the link above, I just did not take the time.
I am trying to populate a form option value if it's attribute quantity equals zero.
My goal is to add the a message to the current option value
My html is:
<select class="valid">
<option disabled="disabled" selected="selected" value="">Select Bar</option>
<option value="1" quantity="99">value 1 </option>
<option value="2" quantity="0">value 2 </option>
</select>
So far I've tried the following in jQuery but it's not working:
if($(this).attr('quantity') == '0') {
$(this).append('<span>message</span>');
}
If you don't care about preserving the original message, than you can simply say $(this).text("message"). Leave out the <span> since it cannot be rendered inside of an <option> element anyway.
if($(this).attr('quantity') == '0') {
$(this).text('message');
}
If you want to preserve the original message, you have a couple options. One would simply be to append the new message to the original, however, it may get tricky to remove it later, so I would suggest having some sort of delimiter so you can easily identify the original vs the appended message, like so:
var $option = $(this);
if($option.attr('quantity') == '0') {
$option.text($option.text().trim() + ' (message)');
}
Then, to remove the message, you can do something like this:
$option.text($option.text().slice(0, $option.text().indexOf('(')).trim());
You can populate the option with like this,
$(document).ready(function () {
$('.valid').on('change', function () {
if ($(this.options[this.selectedIndex]).attr('quantity') == 0) {
$(this.options[this.selectedIndex]).find('span').remove();
$(this.options[this.selectedIndex]).append('<span>Message</span>')
}
});
});
JSFIDDLE
I'm not entirely sure of what you're trying to achieve from your question, but you cannot add html elements to an option element. You can however change the text as follows:
$(document).on('change', '.valid', function(){
var selected = $('.valid > option:selected');
if(selected.attr('quantity') == '0'){
selected.text('something else');
}
});
if you wanted to append an error you could do so by using jQuery append() or concatenating with the original value. Alternatively if you wanted it as validation outside of the select box, you could simply assign to the value of a div by replacing the line inside of the if statement.
<select class="valid" onchange="quality(this.options[this.selectedIndex].getAttribute('quantity'));">
<option disabled="disabled" selected="selected" value="">Select Bar</option>
<option value="1" quantity="99">value 1 </option>
<option value="2" quantity="0">value 2 </option>
</select>
<span id="msg"></span>
<script type="text/javascript">
function quality(val) {
if(parseInt(val) == 0){
document.getElementById("msg").innerHTML = "Message";
}
}
I'm not a coder ut I've found this code here
http://jsfiddle.net/kjy112/kchRh/
<textarea id="mytext"></textarea>
<select id="dropdown">
<option value="">None</option>
<option value="text1">text1</option>
<option value="text2">text2</option>
<option value="text3">text3</option>
<option value="text4">text4</option>
</select>
var mytextbox = document.getElementById('mytext');
var mydropdown = document.getElementById('dropdown');
mydropdown.onchange = function(){
mytextbox.value = mytextbox.value + this.value;
}
I'd like to modify it so that I've more than one dropdown and each one add his text in the same field.
Practically I'd have to create a compact code easily for the user so that the user select some phrases using the dropdown and the code will fill the text field.
If I can be more precise please let me know. As said Iìm not a coder so if you can write down the code to use I'll be very happy.
Thanks!
Here's a js bin with multiple dropdowns' onchange event being listed to: https://jsfiddle.net/kchRh/944/
You want to give the dropdowns class names and then loop through each drop down to setup their listeners.
HTML:
<textarea id="mytext"></textarea>
<select class="dropdown">
<option value="">None</option>
<option value="text1">text1</option>
<option value="text2">text2</option>
<option value="text3">text3</option>
<option value="text4">text4</option>
</select>
<select class="dropdown">
<option value="">2None</option>
<option value="2text1">2text1</option>
<option value="2text2">2text2</option>
<option value="2text3">2text3</option>
<option value="2text4">2text4</option>
</select>
JS:
var mytextbox = document.getElementById('mytext');
var mydropdowns = document.getElementsByClassName('dropdown');
for(i=0;i<mydropdowns.length;i++) {
mydropdowns[i].onchange = function(){
mytextbox.value = mytextbox.value + this.value;
}
}
I'd suggest the following approach:
// create a reusable function:
function updateTextArea() {
// get all the elements with the class 'dropdown':
var selectElems = document.querySelectorAll('.dropdown'),
// get the <textarea> element, using its id:
textArea = document.getElementById('mytext'),
// using Array.prototype.filter on the array-like
// NodeList, using Function.prototype.call, in
// order to iterate over the found '.dropdown'
// elements to form an array of only those elements
// with a non-zero-length value:
values = Array.prototype.filter.call(selectElems, function(el) {
if (el.value.trim().length) {
return el.value;
}
// iterating over the filter-created array, to form a map of
// the selected values of the elements:
}).map(function(el) {
return el.value;
// joining those arrays together, with Array.prototype.join,
// to form a comma-separated string of values, and appending
// a period:
}).join(', ') + '.';
// setting the value of the <textarea> to:
// - an empty string (if the values variable is
// just the appended-period), or to the value of
// the values variable:
textArea.value = values === '.' ? '' : values;
}
// as above, retrieving the '.dropdown' elements:
var selects = document.querySelectorAll('.dropdown');
// iterating over the '.dropdown' elements, using
// Array.prototype.forEach:
Array.prototype.forEach.call(selects, function(el, index, arr) {
// within the anonymous function of Array.prototype.foreach:
// the first argument (here: 'el') is the current array-element,
// second argument (here: 'index') is the index of the current
// array-element within the array over which we're iterating,
// third argument (here: 'arr') is the array over which we're
// iterating.
// binding updateTextArea as the change event-handler for
// each of the array-elements over which we iterate:
el.addEventListener('change', updateTextArea);
});
function updateTextArea() {
var selectElems = document.querySelectorAll('.dropdown'),
textArea = document.getElementById('mytext'),
values = Array.prototype.filter.call(selectElems, function(el) {
if (el.value.trim().length) {
return el.value;
}
}).map(function(el) {
return el.value;
}).join(', ') + '.';
textArea.value = values === '.' ? '' : values;
}
var selects = document.querySelectorAll('.dropdown');
Array.prototype.forEach.call(selects, function(el) {
el.addEventListener('change', updateTextArea);
});
<textarea id="mytext"></textarea>
<select class="dropdown">
<option value="">None</option>
<option value="text1">text1</option>
<option value="text2">text2</option>
<option value="text3">text3</option>
<option value="text4">text4</option>
</select>
<select class="dropdown">
<option value="">None</option>
<option value="text5">text5</option>
<option value="text6">text6</option>
<option value="text7">text7</option>
<option value="text8">text8</option>
</select>
JS Fiddle demo.
Note, in the HTML, I've changed from the use of id to identify the <select> elements, to using class; simply because it allows a group of elements to be associated together without having to use a large number of ids and subsequently having to update the JavaScript in turn with the HTML.
Referencs:
Array.prototype.filter().
Array.prototype.forEach().
Array.prototype.join().
Array.prototype.map().
document.querySelectorAll().
eventTarget.addEventListener().
Function.prototype.call().
i am trying to get the query parameter for http://url.com?send_volume=send_300_gb and then set a form select option based on this.
I can grab the get value and assign to var to use in the assignment but for the life of me can't understand why i can't get the option to set as selected:
<script type="text/javascript">
//This will return a given query string parameter from the current url
function getParameterByName(name) {
var match = RegExp('[?&]' + name + '=([^&]*)').exec(window.location.search);
return match && decodeURIComponent(match[1].replace(/\+/g, ' '));
}
var send_volume_value = getParameterByName('send_volume');
$(document).ready(function () {
$("select[name='send_volume'] > option[value="+ send_volume_value +"]").attr('selected','selected');
});
</script>
Select Form looks like this:
<select class="hs-input" id="send_volume-33ab6f27-e084-4f5d-9690-76e8fec2316d_8893" name="send_volume">
<option value="__PLACEHOLDER__">- Please Select -</option>
<option value="send_300_gb">Send up to 300GB/month</option>
<option value="send_500_gb">Send up to 500GB/month</option>
<option value="send_1_tb">Send up to 1TB/month</option>
<option value="send_custom">Custom</option>
</select>
If the value of the parameter send_volume matches one of the values of the options for example lets say
send_volume == "testval"
and the options are
<select name="send_volume">
<option value="">Select one</option>
<option value="val1">Val 1</option>
<option value="val2">Val 2</option>
<option value="val3">Val 3</option>
<option value="val4">Val 4</option>
</select>
Then this is how you should "select" an option
$("select[name='send_volume']").val(send_volume);
<select> elements do not honor the value attribute, however their DOM API does support a value property shich can be used to set the select's value.
$("select[name=send_volume]").val(send_volume_value);
However, the way you are doing it should also work, but I suspect that either the value of send_volume_value is incorrect, or there is no option with that value. Basically, there are no elements matching your selector in the document.
I'm trying to select a certain option in a select box, but it's not working:
var category = $(row + 'td:nth-child(4)').text();
$('#category_id', theCloned).load('/webadmin/video/get_categories',function(){
$('#category_id', theCloned).val(category);
});
There's no error thrown, but it doesn't change the select box. What am I doing wrong here?
Here is an example of the options loaded by the load() call:
<option value="1">Capabilities</option>
<option value="2">Application Focus</option>
<option value="5">Fun</option>
The value of the category variable is "Fun" or "Capabilities", etc.
var $selectbox = $('#category_id', theCloned), // cache the element to avoid lookup overheads
category = $(row + 'td:nth-child(4)').text();
$selectbox.load('/webadmin/video/get_categories', function(){
$selectbox
.find('option')
.filter(function(){
return $(this).text() === category;
})
.prop('selected', true);
});
Update 1
Updated the code to adjust to the code you presented in your update. This will work. However if an option will contain a part of the string and not the full string it will still be part of the selected elements. E.g.
If the options will be
<option value="1">Capabilities</option>
<option value="2">Application Focus</option>
<option value="5">Fun</option>
<option value="6">Fun Time</option>
<option value="6">Funhouse</option>
And the category variable will have the value Fun, all three last options will be part of the selector.
Update 2
Changed the code to filter the options whose text fully matches the value of the category variable. Thus, you won't have to worry about the Update 1 above.
$('#id_of_select_box').val('your_value');
this will do
Try this
$('#category_id', theCloned).val($.trim(category));
At last i found a new solution Fiddle
<select>
<option value='1'>one</option>
<option value='2' >two</option>
<option value='3' >three</option>
</select>
Script
$("select").on("change",function(){
alert($("select option:selected").text());
});