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The jQuery syntax is tailor-made for selecting HTML elements and performing some action on the element(s). Basic syntax is: $(selector).action() A $ sign to define/access jQuery. A (selector) to "query (or find)" HTML elements. A jQuery action() to be performed on the element(s)
ID and Element selector are the fastest selectors in jQuery.
The jQuery Object: The Wrapped Set: Selectors return a jQuery object known as the "wrapped set," which is an array-like structure that contains all the selected DOM elements. You can iterate over the wrapped set like an array or access individual elements via the indexer ($(sel)[0] for example).
The value of this inside a click event is a DOM element (the one that was clicked). Using $(this) converts it to a jQuery object. DOM elements do not have a hide() methods, but jQuery adds that and many other methods you can then call.
Looks like the change() function is only called when you check a radio button, not when you uncheck it. The solution I used is to bind the change event to every radio button:
$("#r1, #r2, #r3").change(function () {
Or you could give all the radio buttons the same name:
$("input[name=someRadioGroup]:radio").change(function () {
Here's a working jsfiddle example (updated from Chris Porter's comment.)
Per @Ray's comment, you should avoid using names with . in them. Those names work in jQuery 1.7.2 but not in other versions (jsfiddle example.).
<input id='r1' type='radio' class='rg' name="asdf"/>
<input id='r2' type='radio' class='rg' name="asdf"/>
<input id='r3' type='radio' class='rg' name="asdf"/>
<input id='r4' type='radio' class='rg' name="asdf"/><br/>
<input type='text' id='r1edit'/>
jquery part
$(".rg").change(function () {
if ($("#r1").attr("checked")) {
$('#r1edit:input').removeAttr('disabled');
}
else {
$('#r1edit:input').attr('disabled', 'disabled');
}
});
here is the DEMO
You can bind to all of the radio buttons at once by name:
$('input[name=someRadioGroup]:radio').change(...);
Working example here: http://jsfiddle.net/Ey4fa/
This normally works for me:
if ($("#r1").is(":checked")) {}
My problem was similar and this worked for me:
$('body').on('change', '.radioClassNameHere', function() { ...
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