#jquery-selectors

Fixed: How can I detect if a selector returns null? #computers #programming #answer

How can I detect if a selector returns null?

What is the best way to detect if a jQuery-selector returns an empty object. If you do:

alert($('#notAnElement'));

you get [object Object], so the way I do it now is:

alert($('#notAnElement').get(0));

which will write “undefined”, and so you can do a check for that. But it seems very bad. What other way is there?

Answer [by duckyflip]: How can I…

How-to: jQuery to loop through elements with the same class #fix #computers #it

jQuery to loop through elements with the same class

I have a load of divs with the class testimonial and I want to use jquery to loop through them to check for each div if a specific condition is true. If it is true, it should perform an action.

Does anyone know how I would do this?

Answer [by stephen776]: jQuery to loop through elements with the same class

try this…

$('.testimonial').each(func…

Fix: Jquery selector for the label of a checkbox #answer #programming #dev

Jquery selector for the label of a checkbox

<input type="checkbox" name="filter" id="comedyclubs"/> <label for="comedyclubs">Comedy Clubs</label>

If I have a check box with a label describing it, how can I select the label using jquery? Would it be easier to give the label tag an ID and select that using $(#labelId) ?

Answer [by Kip]: Jquery selector for the label of a checkbox

This should work:

Fixed: Toggle Checkboxes on/off #dev #fix #programming

Toggle Checkboxes on/off

I have the following:

$(document).ready(function() { $("#select-all-teammembers").click(function() { $("input[name=recipients\\[\\]]").attr('checked', true); }); });

I’d like the id="select-all-teammembers" when clicked to toggle between checked and unchecked. Ideas? that aren’t dozens of lines of code?

Answer [by Frédéric Hamidi]: Toggle Checkboxes on/off

You can write:

How to: jquery data selector #it #dev #development

jquery data selector

I need to select elements based on values stored in an element’s .data() object. At a minimum, I’d like to select top-level data properties using selectors, perhaps like this:

$('a').data("category","music"); $('a:data(category=music)');

Or perhaps the selector would be in regular attribute selector format:

$('a');

Or in attribute format, but with a specifier to indicate…

Fixed: How to change css display none or block property using Jquery? #dev #it #computers

How to change css display none or block property using Jquery?

How to change css display none or block property using Jquery?

Answer [by GenericTypeTea]: How to change css display none or block property using Jquery?

The correct way to do this is to use show and hide:

$('#id').hide(); $('#id').show();

An alternate way is to use the jQuery css method:

$("#id").css("display", "none");…

Resolved: Is there a case insensitive jQuery :contains selector? #fix #solution #answer

Is there a case insensitive jQuery :contains selector?

Is there a case insensitive version of the :contains jQuery selector or should I do the work manually by looping over all elements and comparing their .text() to my string?

Answer [by Pat]: Is there a case insensitive jQuery :contains selector?

What I ended up doing for jQuery 1.2 is :

jQuery.extend( jQuery.expr[':'], { Contains :…

Fixed jQuery OR Selector? #dev #it #asnwer

jQuery OR Selector?

I am wondering if there is a way to have “OR” logic in jQuery selectors. For example, I know an element is either a descendant of an element with class classA or classB, and I want to do something like elem.parents('.classA or .classB'). Does jQuery provide such functionality?

Answer: jQuery OR Selector?

Using a comma may not be sufficient if you have multiple jQuery objects…