Develop Reference

How to select $(this) and .class to do something in one line?

I know this is a silly question but how can I toggleClass() in a single line to both selectors.
$('.search-ico').click(function(){
$(this).toggleClass('is-active');
$('.class').toggleClass('is-active');
});
I tried below:
$('.search-ico').click(function(){
$(this,'.class').toggleClass('is-active');
});
but it's not working (only this is taking the class).
Thanks

you can use the .add method to combine string selectors and this.
https://api.jquery.com/add/
Use it like this:
$(this).add('.class').toggleClass(...)

Assuming the elements of class search-ico carry an id attribute, you can compose the selector string:
$("#" + $(this).attr('id') + ", .class").toggleClass("is-active")

note you can also add properties to the first object before adding a second object to it, and whatever property you add after the second object applies to all of them..
$(this).css('property','value').add('.class').toggleClass(...)
so here the css property of (this) is altered first.. before added to the second object, and then the toggleClass applied to all of them..

What is the difference between the selectors #id and [id$='id']?

What is the difference between two statements:
$("span[id$='id']").text(var);
// And
$("#id").text(var);
HTML code is : <span class="normal11" id="id"></span>

The first one is using ends with selector while the second one is using just normal id selector.
Attribute Ends With Selector [name$="value"]
ID Selector ("#id")

By the documentation on JQuery:
$("#id") uses the JavaScript function document.getElementById(), which is extremely efficient. Link.
So, the second way should be faster and should be used.

Some different between id selector and attribute selector is
Since id selector called document.getElementById(),
it only return the first element that have a id equal to that.
However, if you use attribute selector, it will return all elements that have the id attribute that equals to that.
But duplicated id is actually invalid in HTML, and should never used.
if you really want to do that, use class instead.
example
$("#id-selector").click(function(){
$("#test").css("color", "red");
});
$("#attr-selector").click(function(){
$("*[id=test]").css("color", "blue");
});
http://jsfiddle.net/toucyqas/1/

jQuery '#' + data("target") pattern

I've seen this a bunch:
Click me
<div id="content">And something will happen here</div>
With JS like this:
$("#trigger").click(function(){
$("#" + $(this).data("target")).hide();
})
It looks a little weird to me to be doing this string concatenation to create selectors which are then used to get the target element. Is there a better pattern in Javascript (with jQuery available) for setting up handlers on one element which need to know about another target element?

Why you do string concatenation just store the id with #
Click me
$("#trigger").click(function(){
$($(this).data("target")).hide();
})
Similarly you can store any selectors as is in data-target say for ex:- .tab1 etc so that you do not have to perform string concatenation again inside the click or any event.

You can simply use
$('#content').modal('toggle');
Any where in you're code to initiate the modal show and hide,
You can use even "show"/"hide" functionality directly.
I assume you're using Bootstrap and one of the latest versions of jQuery.
Enjoy !

Why not do something like this, a much better approach in my opinion:
// Set the target
$("#trigger").data('target', $('#content'));
// Get the target
$("#trigger").click(function(){
$(this).data("target").hide();
})
If you're setting it from the backend, I would include the hash with the attribute value as others have suggested.
Click me
$("#trigger").click(function(){
var target = $(this).data("target");
$(target).hide();
})

You always have the option to build the selector, looks a bit nicer than concatenating the string inside the selector.
$("#trigger").click(function(){
var selector = "#" + $(this).data("target");
$(selector).hide();
});
A little nicer, not sure if it's what you're looking for.

I would skip the data- completely, thus allowing graceful degradation.
Click me
<div id="content">And something will happen here</div>
with
$("#trigger").click(function(e){
e.preventDefault();
$( $(this).attr("href") ).show();
// note, i'm purposly not using this.href due to a bug in IE that would return the entire href rather than just the hash
})

$(this).attr('data-target', '#myTarget');
this worked for me

jquery hasClass, can it be given the beginning of class name, to get the full class name

I'm trying to do something similar to this question, but it's a bit different, so the solution there isn't working for me.
<span class="a-class another-class test-top-left"></span>
I have an element (this code shows a span but it could be div span or anything). This element has a class beginning with test- (test-top-left, test-top-right etc.) I've triggered a click event on classes starting with test- and saved the clicked object as var object = this;. Simple stuff so far.
What I'm trying to do now is get the full name of that class (test-top-left). I know it starts with test- but what's the full name. The thing is that there are other classes a-class another-class and test-top-left. Can hasClass be used to get the full name of the class? I'd prefer not to use find() or filter() just because there may be additional elements within that also have class="test-"
Edit:
The code I have now is, but it gives me ALL the classes. What I need is the single class beginning with test-.
var object = this;
$(object).attr('class');
So now I for loop through all the classes and test each one separately, which seems like a lot of unnecessary code. I'm hoping jQuery has a clever way to get the exact class that was clicked right away.

Description
You can use jQuerys Attribute Contains Selector, .attr() and .click() method.
Attribute Contains Selector - Selects elements that have the specified attribute with a value containing the a given substring.
.attr() - Get the value of an attribute for the first element in the set of matched elements.
.click() - Bind an event handler to the "click" JavaScript event, or trigger that event on an element.
Sample
html
<span class="anyclass test-hello">Hello World</span>​
jQuery
$("[class*='test']").click(function() {
var object = $(this);
alert(object.attr("class").match(/(test-.*?)(?:\s+|$)/)[1])
;});
Check out the updated jsFiddle
Update
If you dont want to use regex you can do this.
$("[class*='test']").click(function() {
var object = $(this);
alert("test-" + object.attr("class").split("test-")[1].split("-"))
;});
​
More Information
jQuery - Attribute Contains Selector
jQuery - .attr()
jQuery - .click()
jsFiddle Demonstration

This should work for you:
var object = this;
var className = object.className.match(/(test-.*?)(?:\s+|$)/)[1];
Class name is the name of the class you are looking for.

If you don't want to use split or regex, you can try having the class in a separate attribute
<span class="someclass test-something" _rel="test-something">test<span>
or
<span class="someclass" _rel="test-something">test<span>
with the script
$("[_rel*='test-']").click(....
And to retrieve the attribute, use $(this).attr("_rel")

Combine two selectors with one jQuery object

I have two divs with id's: #addNew_tab and #sendCom_tab.
I'd like clicking on either of these to trigger the same jQuery click() function.
I was thinking something like:
$("#addNew_tab", "#sendCom_tab").click(function(){
//do stuff
});
but that doesn't work.

$("#addNew_tab, #sendCom_tab").click(function(){
//do stuff
});
Changed from:
$("#addNew_tab", "#sendCom_tab")
To:
$("#addNew_tab, #sendCom_tab")
comma inside the selector("a, b") means the first plus the second; Just like with CSS selectors
(Well, it's a CSS selector...)
jQuery(selector)
Description: Accepts a string containing a CSS selector which is then used to match a set of elements.
It's equal to:
$("#addNew_tab").add("#sendCom_tab")...

function doStuff() {
// do stuff
}
$("#addNew_tab").click(doStuff);
$("#sendCom_tab").click(doStuff);