Develop Reference

How can I insert a whole css class before an HTML element that I find?

I need to insert an image before an element I am trying to find in this code (also I am trying to add the class in the same function).
The js:
insertSearchIcon: function(){
$(document).find('jstree-icon').prepend('<div class="oob-dropdown">test</div>');
}
And the css class I am trying to insert.
.oob-dropdown {
background-image: url("/apps/cdpe/img/search_444444.png");
background-color: transparent;
background-repeat: no-repeat;
height: 25px;
width: 25px;
border: none;
padding-top: 1cm;
position: relative;
}
Hopefully what I am trying to do is possible, but thanks for any help!

you probably missed the . in your selector find('jstree-icon') and secondly prepend() adds another item before the first child element of the matched selector.
To add another element right before another you might be interested in before:
$('.jstree-icon').before('<div class="oob-dropdown">test</div>');
Btw: $(document).find() is probably not best practice, rather use the selector directly!

.prepend() inserts an element as the first child of another; it sounds like you need .before(). Your selector also needs a dot (assuming jstree-icon is a class).
$('.jstree-icon').before('<div class="oob-dropdown">test</div>');

Any way to save a property in :before / :after using jquery

Question: I know i can't access :before and :after selectors via jQuery by writing a code like this. Because :before / :after are not the part of the DOM.
$(document).ready(function(e){
var beforebg = $('.SomeClass:before').css('background-color');
})
Is there any way i can save the value in a variable or there isn't any way at all? I know there are methods discussed here like on this post where it says that i make another class and define :before / :after on that class and then toggle that class using jQuery. But that is not my requirement here. I need this value to be stored in a variable so to use in my script.
Update: Why i need this to be stored in a vairable?
Please refer to my this question here to know what am doing. When i am able to store this value in a variable, i'd be able to iterate over DOM using each() and then i'll be able to add a specific class to an element that has a background-color equal to the color stored in that variable (beforebg in my case).
Update: Check this css code
.service-content:after {
background: none repeat scroll 0 0 #eb2c33;
border-radius: 100%;
box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.09);
content: "";
height: 8px;
left: 274px;
margin-top: -58px;
position: absolute;
top: 50%;
width: 8px;
z-index: 3;
}
So can i store the value "background" color value ( "#eb2c33" in this case ) in the variable beforebg?

There is no psudeo selectors :before or :after in jquery. if you want try this way
$(document).ready(function(e){
var beforebg = $('.SomeClass').addClass('sample');
});
In your style sheet
.SomeClass.sample:before,
.SomeClass.sample:after {
background: #ccc;
}

Change the style of :before and :after pseudo-elements? [duplicate]

This question already has answers here:
Selecting and manipulating CSS pseudo-elements such as ::before and ::after using javascript (or jQuery)
(26 answers)
Closed 3 years ago.
This is what my code looks like:
$('.mainSpan:before').css('background','url(_gfx/cmn/main_bg.png)');
This does not seem to work so I'm asking if it's even possible to add
background images to shadow elements with jQuery.

It's not possible to directly access pseudo-elements with Javascript as they're not part of the DOM. You can read their style using the optional second argument - which most, although not all, browsers in current use support - in .getComputedStyle() but you can't directly change their style.
However, you could change their style indirectly by adding in a new style element containing new rules. For example:
http://jsfiddle.net/sjFML/
The initial CSS assigns the :before pseudo-element with a green background, which is turned to black by inserting a new style element.
HTML:
<div id="theDiv"></div>
CSS:
#theDiv {
height: 100px;
background: red;
}
#theDiv:before {
content:' ';
display: block;
width: 50px;
height: 50px;
background: green;
}
Javascript:
var styleElem = document.head.appendChild(document.createElement("style"));
styleElem.innerHTML = "#theDiv:before {background: black;}";

There is also solution with CSS Variables (aka custom properties):
var style = document.querySelector('.foo').style;
style.setProperty('--background', 'url(http://placekitten.com/200/300)');
.foo::before {
background: var(--background);
content: '';
display: block;
width: 200px;
height: 300px;
}
<div class="foo"></div>
For browser support see Can I use and here is link to Ponyfill (same as Polyfill, but you need to call a function)
Ponyfill work with CSS in link and style CSS, but if you use code below, you can set the variable like with setProperty (it will run only in browsers that don't support CSS Variables like IE11)
var style = document.querySelector('.foo').style;
style.setProperty('--background', 'url(http://placekitten.com/200/300)');
cssVars({
variables: {'--background': 'url(http://placekitten.com/200/300)'}
});
.foo::before {
background: var(--background);
content: '';
display: block;
width: 200px;
height: 300px;
}
<div class="foo"></div>
<script src="https://unpkg.com/css-vars-ponyfill#2/dist/css-vars-ponyfill.min.js"></script>
Unfortunately the cssVar ponyfill is global like setting var on :root. If you need to support IE11 or other old browser you can try to search for better polyfill or library.

It is possible to change the value of the ::after element but not directly. Gotta be sneaky. Works on all browsers.
Let's say you have an element:
<div class="thing1">hi here</class>
And you got an ::after css style for it:
.thing1::after {
content:"I am what comes ::after a thing :)";
display: inline-block;
background-color: #4455ff;
padding:3px;
border: 1px solid #000000; }
And you want to change the content and the background color of the ::after pseudo-element using javascript. To do this, make a second CSS rule with the changes you want applied and have both the current class name and add a totally new class name to it. So let's say I want to change the content and the background color a bit and leave the rest of the stuff, the same:
.thing1.extra_stuff::after {
content:"Some parts of me, changed!";
background-color: #8888cc; }
Now, you can just fire off an onclick javascript event that will apply those two new rules to the element, by adding the second class name, to the element :) yay
function change_the_after_attribute(thing_button) {
thing_button.className="thing1 extra_stuff"; }
https://jsfiddle.net/bt8n26a5/
fun side notes:
You can use thing_button.classList.add("extra_stuff"); and thing_button.classList.remove("extra_stuff"); to make the function applicable to many different elements with many different class names, and to be able to remove your changes, as well!
Use a variable instead of the "extra_stuff" string to change what you're adding more dynamically.

Change background color via a checkbox when checked with Jquery

I'm trying to change the background color of a div with a checkbox in it. I've made this for reference. I'm trying to replace the parent <div> with the 'highlight' <div>, so I thought the toggle <div> would work. When the checkbox is deselected, I would like the background color to go back to normal (or remove the 'highlight' <div>). Any help is appreciated.

You are setting an inline background-color style for the divs. This takes precedence over any properties you set via a CSS rule.
Add !important to the background-color value of the checked class in your css file, like so: http://jsfiddle.net/KtsGs/1/

There are a few issues present in the jsFiddle.
The first one is that, despite having written jQuery code, you haven't selected jQuery as the framework on the left hand side. That's a small issue specific to the code on jsFiddle, and easily fixed, though.
The second issue is that you have inline styles on the <div> elements, including a background-color. That inline style will be used in preference to any background-color specified using a CSS class (unless it's specified as being !important), so even when your code correctly adds the checked class to the element, the background colour isn't going to change.
The simplest solution is to simply change your CSS declaration:
.checked {
background-color: #ff0000 !important;
}
Here is an updated version of your jsFiddle with the working functionality (using the suggestion above).
However, I'd suggest you instead move the inline styles and JavaScript event handlers to their own CSS declarations, so you don't have to specify !important. That would require the following changes:
#holder > div {
clear: both;
padding: 0.5%;
margin-bottom: 1px;
border-bottom: 1px solid #eee;
float: left;
width: 96%;
style: height: 16px;
cursor: pointer;
background-color: white; // added this to the existing CSS
}
#holder > div:hover { // this is new
background-color: #fafafa;
}
Then move the CSS declaration for .checked below those, so that it takes precedence for the background-color property.
Here is another updated version of your jsFiddle, using the CSS declarations instead.

JQuery autocomplete result style

I'm trying to change the style from my AutoComplete result.
I tried:
// Only change the inputs
$('.ui-autocomplete-input').css('fontSize', '10px');
$('.ui-autocomplete-input').css('width','300px');
I searches and could not find out what the class used by the result is, so that I can change its font size and maybe its width.
Thanks.
Using:
jQuery-UI AutoComplete
EDIT: I need change the css from my result, that comes from my JSON, not from the input. The code you posted, only changes the input, not the result. This is why I asked for the class used by the result list (at least, I believe that is a list). I tried to use fb from ff and could not find it. Thanks again for your patience.
EDIT2: I'll use the autocomplete from jQuery UI as example.
Check this to see the jQuery-UI auto-complete page
After I type "Ja" in the textbox from the front-page sample, Java and JavaScript will appear as Results, in the little box below the textbox.
This little box is what I want to change the CSS of. My code in the sample above only changes my textbox CSS (which I don't need at all).
I don't know if I'm being clear now. I hope so, but if not, please let me know; I'll try harder if needed to show my problem.
The class for the UL that will contain the result items is what I need.
SOLUTION
As Zikes said in his comment on the accepted answer, here is the solution. You just need to put ul.ui-autocomplete.ui-menu{width:300px} in your CSS file.
This will make all the the results box css have width:300px (like the sample).
I forgot that the results object does not exist on page load, and therefor would not be found and targetted by a call to $('...').css(). You'll actually need to put ul.ui-autocomplete.ui-menu{width:300px} in your CSS file, so that it will take effect when the results are generated and inserted into the page.
– Zikes

Information on styling the Autocomplete widget can be found here: http://docs.jquery.com/UI/Autocomplete#theming
Fiddle
HTML
<input type="text" id="auto">
jQuery
$('#auto').autocomplete({'source':
['abc','abd','abe','abf','jkl','mno','pqr','stu','vwx','yz']
});
CSS
ul.ui-autocomplete.ui-menu{width:400px}
/*
targets the first result's <a> element,
remove the a at the end to target the li itself
*/
ul.ui-autocomplete.ui-menu li:first-child a{
color:blue;
}

I was able to adjust by adding this css to the <head> of the document (above the autocomplete javascript).
Some of the following may be more relevant than others. You could make it specific to the autocomplete input if changing these affects other elements you don't want affected.
<style type="text/css">
/* http://docs.jquery.com/UI/Autocomplete#theming*/
.ui-autocomplete { position: absolute; cursor: default; background:#CCC }
/* workarounds */
html .ui-autocomplete { width:1px; } /* without this, the menu expands to 100% in IE6 */
.ui-menu {
list-style:none;
padding: 2px;
margin: 0;
display:block;
float: left;
}
.ui-menu .ui-menu {
margin-top: -3px;
}
.ui-menu .ui-menu-item {
margin:0;
padding: 0;
zoom: 1;
float: left;
clear: left;
width: 100%;
}
.ui-menu .ui-menu-item a {
text-decoration:none;
display:block;
padding:.2em .4em;
line-height:1.5;
zoom:1;
}
.ui-menu .ui-menu-item a.ui-state-hover,
.ui-menu .ui-menu-item a.ui-state-active {
font-weight: normal;
margin: -1px;
}
</style>

If you are using the official jQuery ui autocomplete (i'm on 1.8.16) and would like to define the width manually, you can do so.
If you're using the minified version (if not then find manually by matching _resizeMenu), find...
_resizeMenu:function(){var a=this.menu.element;a.outerWidth(Math.max(a.width("").outerWidth(),this.element.outerWidth()))}
...and replace it with (add this.options.width|| before Math.max) ...
_resizeMenu:function(){var a=this.menu.element;a.outerWidth(this.options.width||Math.max(a.width("").outerWidth(),this.element.outerWidth()))}
... you can now include a width value into the .autocomplete({width:200}) function and jQuery will honour it. If not, it will default to calculating it.

Just so you know you have two options for optimizing your code:
Instead of this:
$('.ui-autocomplete-input').css('fontSize', '10px');
$('.ui-autocomplete-input').css('width','300px');
You can do this:
$('.ui-autocomplete-input').css('fontSize', '10px').css('width','300px');
Or even better you should do this:
$('.ui-autocomplete-input').css({fontSize: '10px', width: '300px'});