I have 3 radio buttons in my web page, like below:
<label for="theme-grey">
<input type="radio" id="theme-grey" name="theme" value="grey" />Grey</label>
<label for="theme-pink">
<input type="radio" id="theme-pink" name="theme" value="pink" />Pink</label>
<label for="theme-green">
<input type="radio" id="theme-green" name="theme" value="green" />Green</label>
In jQuery, I want to get the value of the selected radio button when any of these three are clicked. In jQuery we have id (#) and class (.) selectors, but what if I want to find a radio button by its name, as below?
$("<radiobutton name attribute>").click(function(){});
Please tell me how to solve this problem.
This should do it, all of this is in the documentation, which has a very similar example to this:
$("input[type='radio'][name='theme']").click(function() {
var value = $(this).val();
});
I should also note you have multiple identical IDs in that snippet. This is invalid HTML. Use classes to group set of elements, not IDs, as they should be unique.
To determine which radio button is checked, try this:
$('input:radio[name=theme]').click(function() {
var val = $('input:radio[name=theme]:checked').val();
});
The event will be caught for all of the radio buttons in the group and the value of the selected button will be placed in val.
Update: After posting I decided that Paolo's answer above is better, since it uses one less DOM traversal. I am letting this answer stand since it shows how to get the selected element in a way that is cross-browser compatible.
$('input:radio[name=theme]:checked').val();
another way
$('input:radio[name=theme]').filter(":checked").val()
This works great for me. For example you have two radio buttons with the same "name", and you just wanted to get the value of the checked one. You may try this one.
$valueOfTheCheckedRadio = $('[name=radioName]:checked').val();
The following code is used to get the selected radio button value by name
jQuery("input:radio[name=theme]:checked").val();
Thanks
Adnan
For anyone who doesn't want to include a library to do something really simple:
document.querySelector('[name="theme"]:checked').value;
jsfiddle
For a performance overview of the current answers check here
I found this question as I was researching an error after I upgraded from 1.7.2 of jQuery to 1.8.2. I'm adding my answer because there has been a change in jQuery 1.8 and higher that changes how this question is answered now.
With jQuery 1.8 they have deprecated the pseudo-selectors like :radio, :checkbox, :text.
To do the above now just replace the :radio with [type=radio].
So your answer now becomes for all versions of jQuery 1.8 and above:
$("input[type=radio][name=theme]").click(function() {
var value = $(this).val();
});
You can read about the change on the 1.8 readme and the ticket specific for this change as well as a understand why on the :radio selector page under the Additional Information section.
If you'd like to know the value of the default selected radio button before a click event, try this:
alert($("input:radio:checked").val());
You can use filter function if you have more than one radio group on the page, as below
$('input[type=radio]').change(function(){
var value = $(this).filter(':checked' ).val();
alert(value);
});
Here is fiddle url
http://jsfiddle.net/h6ye7/67/
<input type="radio" name="ans3" value="help">
<input type="radio" name="ans3" value="help1">
<input type="radio" name="ans3" value="help2">
<input type="radio" name="ans2" value="test">
<input type="radio" name="ans2" value="test1">
<input type="radio" name="ans2" value="test2">
<script type="text/javascript">
var ans3 = jq("input[name='ans3']:checked").val()
var ans2 = jq("input[name='ans2']:checked").val()
</script>
If you want a true/false value, use this:
$("input:radio[name=theme]").is(":checked")
Something like this maybe?
$("input:radio[name=theme]").click(function() {
...
});
When you click on any radio button, I believe it will end up selected, so this is going to be called for the selected radio button.
I you have more than one group of radio buttons on the same page you can also try this to get the value of radio button:
$("input:radio[type=radio]").click(function() {
var value = $(this).val();
alert(value);
});
Cheers!
can also use a CSS class to define the range of radio buttons and then use the following to determine the value
$('.radio_check:checked').val()
This worked for me..
HTML:
<input type="radio" class="radioClass" name="radioName" value="1" />Test<br/>
<input type="radio" class="radioClass" name="radioName" value="2" />Practice<br/>
<input type="radio" class="radioClass" name="radioName" value="3" />Both<br/>
Jquery:
$(".radioClass").each(function() {
if($(this).is(':checked'))
alert($(this).val());
});
Hope it helps..
$('input:radio[name=theme]').bind(
'click',
function(){
$(this).val();
});
You might notice using class selector to get value of ASP.NET RadioButton controls is always empty and here is the reason.
You create RadioButton control in ASP.NET as below:
<asp:RadioButton runat="server" ID="rbSingle" GroupName="Type" CssClass="radios" Text="Single" />
<asp:RadioButton runat="server" ID="rbDouble" GroupName="Type" CssClass="radios" Text="Double" />
<asp:RadioButton runat="server" ID="rbTriple" GroupName="Type" CssClass="radios" Text="Triple" />
And ASP.NET renders following HTML for your RadioButton
<span class="radios"><input id="Content_rbSingle" type="radio" name="ctl00$Content$Type" value="rbSingle" /><label for="Content_rbSingle">Single</label></span>
<span class="radios"><input id="Content_rbDouble" type="radio" name="ctl00$Content$Type" value="rbDouble" /><label for="Content_rbDouble">Double</label></span>
<span class="radios"><input id="Content_rbTriple" type="radio" name="ctl00$Content$Type" value="rbTriple" /><label for="Content_rbTriple">Triple</label></span>
For ASP.NET we don't want to use RadioButton control name or id because they can change for any reason out of user's hand (change in container name, form name, usercontrol name, ...) as you can see in code above.
The only remaining feasible way to get the value of the RadioButton using jQuery is using css class as mentioned in this answer to a totally unrelated question as following
$('span.radios input:radio').click(function() {
var value = $(this).val();
});
This question already has answers here:
How to implement "select all" check box in HTML?
(31 answers)
Closed 9 years ago.
I'm trying to have a checkbox called 'All' that when checked, also checks the rest of the checkboxes in my form. I have basically no javascript experience so sorry if this is really basic. I patched this together from looking at posts like this and this.
<script type="text/javascript">
function checkIt(checkbox)
{
document.GetElementById("1").checked = true;
document.GetElementById("2").click();
}
</script>
My HTML looks like this:
<form>
<input type="checkbox" id="A" onclick="checkIt(this)">All<br></input>
<input type="checkbox" id="1">One<br></input>
<input type="checkbox" id="2">Two<br></input>
</form>
How can I get checkboxes 1 and 2 to change when I select checkbox All? Thanks.
Since you are not familiar with javascript, I suggest looking into the jQuery javascript library. Many coders find it simpler to learn/use, and there is no debate that it requires MUCH less typing.
Here are some introductory jQuery tutorials if you are curious.
To solve your problem, I added a class to the checkboxes that you wish to automatically check/uncheck, and used that class to check/uncheck the boxes.
Working jsFiddle here
HTML:
<form>
<input type="checkbox" id="A">All<br></input>
<input type="checkbox" class="cb" id="1">One<br></input>
<input type="checkbox" class="cb" id="2">Two<br></input>
</form>
JQUERY:
$('#A').click(function() {
// alert($(this).prop('checked'));
if ($(this).is(':checked') == true) {
$('.cb').prop('checked', true);
}else{
$('.cb').prop('checked', false);
}
});
Note that this solution uses jQuery, so you need the jQuery library loaded (usually put this line in your head tags):
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
I used code from the following:
Fancy checkboxes
The demo appears to work but it seems that it does not really change the status of the checkbox. Rather it just makes it looked checked or not checked.
Here's the HTML:
<fieldset class="checkboxes">
<label for="checkbox-01" class="label_check c_on"><input type="checkbox" checked="" value="1" id="checkbox-01" name="sample-checkbox-01"> I agree to the terms & conditions.</label>
<label for="checkbox-02" class="label_check"><input type="checkbox" value="1" id="checkbox-02" name="sample-checkbox-02"> Please send me regular updates.</label>
</fieldset>
Here's the javascript that is used:
<script type="text/javascript">
function setupLabel() {
if ($('.label_check input').length) {
$('.label_check').each(function () {
$(this).removeClass('c_on');
});
$('.label_check input:checked').each(function () {
$(this).parent('label').addClass('c_on');
});
};
};
var linkObj;
$(document).ready(function () {
$('.label_check, .label_radio').click(function () {
setupLabel();
});
setupLabel();
Can someone please confirm if there's a problem with the code. Seems to me that the author has missed making the code change the checkbox checked state.
Here's the code I use to check the status of the checkbox:
var action = $('#htmlEdit').is(":checked") ? "Editing HTML" : "Editing";
Am I doing the check wrongly or is the author's code just not changing the input element?
Not clear, but it works
http://jsfiddle.net/mplungjan/U4cLN/
When you click a label that uses
<label for="checkboxID" />, the box gets checked (and unchecked) in any browser without needing JavaScript. It is pure browser default behaviour
So
<LABEL class="label_check" for="checkbox-02"><INPUT name="sample-checkbox-02" id="checkbox-02" value="1" type="checkbox"> Please send me regular updates.</LABEL>
will check the box and the script styles the label
I have HTML like this:
<input type="radio" name="v" value="1"> 1<br>
<input type="radio" name="v" value="2"> 2<br>
<input type="radio" name="v" value="3" checked> 3<br>
I want to know how to monitor all of those radio buttons. I could have many more than 3.
One thing I considered is to have an onclick function for all of them. Is that the right way, or is there a neater way to register a common javascript function when the radio button set has changed?
In addition to Markandey's comment: if you are using jquery, you can use attribute selectors instead of classnames without too much hassle so that you have minimal code.
$("input[name=v]").click(mycallback);
In the mycallback function, 'this' will refer to the element that was clicked.
e.g.
mycallback = function(){
alert($(this).val());
};
Putting an onclick attribute on each element creates a maintenance headache. It also prevents you from treating HTML and JavaScript as separate layers - a data layer and a behaviour layer - in the same way that CSS is your presentation layer.
Listening for events is a more mature way of developing JavaScript. Initially it takes a bit of getting used to (as it is no longer obvious from the element alone that some functionality will get triggered when you click on it) but you soon find your way around that by organising and commenting your code better.
Edited because I saw I hadn't turned the 'this' into a jquery object, and when you are in the callback 'this' is the native DOM object so .val() wouldn't work.
<input class="someclass" type="radio" name="v" value="1"> 1<br>
<input class="someclass" type="radio" name="v" value="2"> 2<br>
<input class="someclass" type="radio" name="v" value="3" checked> 3<br>
function yourcallback()
{
}
$('.someclass").click(yourcallabck);
This the way you can do using jquery
You can add an event listener to the parent of these elements. Events bubble up the DOM tree so you only need to attach one handler.
See an example here: http://jsfiddle.net/cLzBV/3/
How do I register a javascript event handler to an element that hasn't been added to the page yet...
This is a similar post with good solution how to have an 'onclick' function for all of them.
And next code I see useful for you:
document.onclick = myRadioButtonOnClickHandler;
function myRadioButtonOnClickHandler(e) {
var realTarget = e ? e.target : window.event.srcElement;
if (realTarget.nodeName.toLowerCase() === 'input' && realTarget.type === 'radio' ) {
doSomething();
}
}
Hope it helpful.
You can use Jquery add class to every radio such as "RadioClass" add jquery file to your page and use the code below...
$(document).ready(function() {
$('.RadioClass').click(function () {
alert($(this).val());
});
});
I want to use jQuery to detect clicks on a bunch of radio buttons. They have all been assigned a css class, foobar, to detect them. Easy, right? Still, this code doesn't work:
$("input.foobar").click(function ()
{
alert(this.id);
}
);
What wrong with the code above?
Does this.id really return the id of the current radio button?
EDIT: The HTML on the page is really borked (doesn't valdiate), so maybe that's the problem...
EDIT 2: The HTML is messed up beyond salvation. Will have to let it be and fix a workaround. May the HTML Gods forgive me!
$("input.foobar").change(function () {
alert(this.id);
});
Essentially there is nothing wrong with your code, it should work. But maybe the html would help, to understand where the problem lies.
And to answer your second question, yes, 'this.id' is valid javascript.
Try
$("input.foobar").change(function ()
rather than .click(function ()
There is nothing wrong with your code example and it works as expected for me:
<input type="radio" class="foobar" id="x1" />
<input type="radio" class="foobar" id="x2" />
<input type="radio" class="foobar" id="x3" />
Clicking on the radios shows the alert box with the radio's id. Did you really click on the box, not some surrounding text or label element?