CSS - Style specific to single Element - css

I'm using jQuery to add a Class to a few elements.
I'm not new to adding classes, nor removing them. But I'm still somewhat intermediate with styles and any flexibility styles can perform to single elements.
Here's what's going on:
I have 2 Divs that I'm affecting with jQuery:
<div id="columnleft">stuff in here</div>
<div id="columncenter">bigger stuff in here</div>
In a nutshell, column left is about 155px wide, while columncenter is positioned relative to columnleft, with a margin-left of 162px
Here's my styles:
<style>
#columnleft {
float:left;
position:relative;
text-align:left;
width:155px;
}
#columncenter {
position:relative;
padding-bottom:50px
margin:0;
margin-left:162px;
}
</style>
I'm basically toggling these 2 divs with the jQuery examples below:
So far I've gotten these 2 separate instances to work:
$("#columnleft").hide();
$("#columncenter").css("margin","0px");
then........
$("#columnleft").show();
$("#columncenter").css("margin-left","162px");
Though this works, I'm not quite satisfied.
I'd prefer to create a class or two that I can use to toggle the hiding of columnleft, while also changing the margin-left at the same time.
It's all fine with the example above, when I'm only using jQuery. But there are times when a page loads, and the columnleft is meant to be hidden, and columncenter is meant to be expanded, from the beginning. Would be nice to not need jQuery to enter the scene at those moments.
All I could come up with is:
<style>
.disappear { display:none; }
.maximize { margin:0px; margin-left:0px; }
</style>
When the page loads:
<div id="columnleft" class="disappear">stuff in here</div>
<div id="columncenter" class="maximize">bigger stuff in here</div>
it seems that columncenter is ignored. (columnleft indeed does disappear)
Also, toggling with jquery, the same result occurs.
Column Center hates me!
Does anyone see where I'm missing the mark?

View JSFiddle: http://jsfiddle.net/tuanderful/bTZq8/
What if you had another div that contains both #columnleft and #columncenter, and has a class of .hide-left or .show-left:
<div class="hide-left">
<div id="columnleft">stuff in here</div>
<div id="columncenter">bigger stuff in here</div>
</div>
​
Then add the following CSS:
.show-left #columnleft {
display: block;
}
.show-left #columncenter {
margin-left: 162px;
}
.hide-left #columnleft {
display: none;
}
.hide-left #columncenter {
margin-left: 0;
}
You can update your jQuery to simply toggle the .hide-left or .show-left classes on the parent container.
What I did here is similar to adding .disappear and .maximize styling, but I added a bit of context around the two columns. The neat thing is that all of the styling is handled purely by CSS - when you want to show or hide your sidebar, you only need JavaScript to update the state of the container; that is, change the class in the container from hide to show or vice versa.

You need to put !important on the css styling.
.maximize {
margin-left: 0px !important;
}
That makes it so that it overrides any other styling of the same kind. Check it out here.
There is an order of importance in CSS. An id # is considered more important than a class . (there can only be one id and many classes after all). So if you are trying to override an id with a class, you need to use !important.

each type of selector in css is weighted differently id being higher than classes and classes being higher than objects
to fix your problem make the selector as such
#columncenter.maximize
this will overwrite the rule before it
don't use !important while it might work now it can be hard to find out why something is being overridden later on

Related

How to Change .popover-content CSS for ui-bootstrap popover

I am using the ui-bootstrap popover to list some notifications in my application.
I am using the uib-popover-template to design the content of the popover.
I would like to change the padding settings for each elements inside the popover.
I have tried using the popover-class attribute, but this just configures the CSS for the overall popover, and not the elements contained inside - this is what the .popover-content CSS class seems to govern.
Here is the html for the popover:
<span class="glyphicon glyphicon-globe" uib-popover-template="'myNotifications.html'"
popover-class="my-notifications-popover"></span>
Additionally, I don't want to do this just by doing:
.popover-content {
margin: 0px;
}
as I have used popovers in multiple places throughout my application and don't want them all to get their CSS redefined.
Can anyone tell me how to change this in the correct manner? All help much appreciated...
EDIT 1: I've tried to do as suggested in the comments by makshh and use CSS selectors to modify the '.popover-content' class. This class is a div contained within the parent '.popover' class.
I tried to do this with the following:
.my-notifications-popover {
margin-left: 0px;
}
.my-notifications-popover div {
margin-left: 0px;
}
This should make the margin-left zero for all child divs of .my-notifications-popover which should be applied to the popover. However it doesn't seem to be applied at all. This approach may not be ideal since it would set the margin for all divs below the popover which I may not want. Is there a way to specifically target the .popover-content class specifically using the CSS selectors?
I've created a plnkr to show exactly how this is not working.... You can see it here: https://plnkr.co/edit/Lr43L5b0YUbZEa5Zkvso
Added
.popover-no-margin .popover-content {
padding: 0px;
}
https://plnkr.co/edit/NiIh6qwZiscNZC5ZZrod?p=preview
which works because you passed the custom class
popover-class="popover-no-margin"
Well it seems like it was padding and not margin that needed to be changed! What a moron... oh well... sorry about that... still not sure what is the most accurate way to target just the popover-content div
Add this to your plunker example.. .popover-no-margin .popover-content{
padding:0px;
} and check if this is what you wanted.
This removes the extra spaces in the popover and it will be applies to this popover only as you have already defined the class popover-no-margin for this element.
Just check my code css is reflecting for popover content. You can handle css for popover by adding css to popover-content .popover-line or creating a custom css for popover as popover-class="my-popover-class":
HTML
<button popover-class="my-popover-class" popover-placement="right" uib-popover-template="dynamicPopover.templateUrl" popover-title="{{dynamicPopover.title}}" type="button" class="btn btn-default">Popover With Template</button> <script type="text/ng-template" id="myPopoverTemplate.html">
<div class="popover-line"> item 1 : This an example of angular ui-bootstrap popover custom content css</div>
<div class="popover-line"> item 2</div>
<div class="popover-line"> item 3</div> </script>
CSS
.popover-content .popover-line { margin: 10px 0px; }
.my-popover-class { color: blue; padding-left: 0 !important;}
Working demo is here
You can add your css accordingly as you want within .popover-content .popover-line (like color,margin,padding and so on)
I checked your code. You miss something. Dynamically created content can't load existing CSS or Js. You should load css and js when you click the button. Just follow this way. I hope it will work with it well.
<script type="text/ng-template" id="popoverTemplate.html">
<div class="popover-line"> item 1</div>
<div class="popover-line"> item 2</div>
<div class="popover-line"> item 3</div>
<style>
.popover-content{
display: block;
width: 200px;
}
.popover-content .popover-line{
background-color: #ff00ff;
border-bottom: 2px solid #121212;
padding: 10px 15px;
}
</style>
</script>
If you write this way your custom CSS then it will work property. See the Image below how I write code.
I hope it will help your project.

Two DIVs, same level, target only the first via CSS

I have the following structure:
<div class="irrelevant"></div>
...
<div class="div1"></div>
...
<div class="irrelevant"></div>
...
<div class="irrelevant"></div>
...
<div class="div2"></div>
I'd like to apply some CSS only to .div1, considering that it's on the same level as (not a children or parent of) .div2.
EDIT: To bring some light in the issue: The first div is actually my website's logo and the second div is a navigation that MAY or MAY NOT exist depending on the page viewed. If the navigation is present, I need to display the logo in a different manner (resize it).
CSS works as a cascade then you can never refer to elements based on what is next to them, just possible refer elements based on what was there before them.
The subjects of a selector are always a subset of the elements matching the last simple selector
For this you may need the help of Jquery:
$(document).ready(function (){
if($('.div2').lenght > 0) {
/*actions for .div1 here*/
}
})
Since the class of both the divs are different, you can apply some specific rules to div1 by using class selector .div1
.div1 {
/* div1 styles */
}
Ah, so you want to apply css to div1 if div2 exists? CSS can't do that. You need JS. jQuery for example:
$('.div2').parent().find('.div1')
you can then apply the css directly or add another class ('div2exists') and add your style in your css-file
Though there's a way doing this in CSS, I personally would not recommend that.
It will only work if we assume we have a fixed number of div elements inside some ".container" div. And this number is 6, 2nd is the logo (also it is 5th counting from the end), 5th is the navigation.
.container {}
.container .logo {}
.container .navigation {}
.container div:nth-child(2):not(:nth-last-child(5)).logo {
width: 100px;
height: 100px;
}
.container div:nth-child(2):nth-last-child(5).logo {
width: 200px;
height: 200px;
}
The first rule is for the logo with navigation
The second rule is for the logo without navigation
Again don't do this, CSS is not designed for that.
You basically want to select a sibling, you will find a detailed post in this link CSS Tricks - Child and Sibling Selectors
.div1 ~ .div2{
Do your stuff here
}
This chunk will only take place if .div1 exists in your markup, is that what you wanted?
Edit:
I've noticed that your desired selector precedes the other one, this code will only work if the desired selector in this case .div1 is after .div2 .. CSS doesn't have that you will have to use jQuery

CSS div naming grammar

Can you use the word div to name a div class? or id?
for example:
#div.leftcol
or does it just get seen as
#leftcol
The browser will see that as <div id="div" class="leftcol"></div>
I don't follow what you mean, but I think what you're asking is can you use the word div to apply a class to div elements. If that's what you mean, then yes you can, and you do it exactly as you have shown in your question:
div.leftcol { color: red }
That style would be applied to all elements of type div with class leftcol. Without the div part, the style would apply to any element with class leftcol, regardless of what type of element it is:
.leftcol { color: red }
Edit now the question has been edited...
After the edit to your question, it makes a bit more sense (I think). Your first example would apply to an element with an id of div and a class of leftcol:
<div id="div" class="leftcol"></div>
The second example would apply to an element with an id of leftcol:
<div id="leftcol"></div>
Or if you are simply asking whether div is a some sort of reserved word in CSS, no, it's not, so feel free to use it as an identifier. However, that could get confusing (for example, you could end up with selectors like div.div #div)
can you provide an example?
you can use <div class="leftcol"> left content </div>
and then in your css .leftcol { background:red; }
you can address it either div.leftcol or just simple .leftcol
As in?
<div id="div.leftcol">Some content</div>
While it may work for HTML and Javascript it should cause a problem if you try to style it in a CSS stylesheet. As I am sure you know the following
div.leftcol {
color: #efefef;
}
means "Set the text color to #efefef for any div element that has leftcol as a class name" so it would not work. I have no idea if
div.div.leftcol {
color: #efefef;
}
would work but that is just ugly...

How to exclude a CSS formatting? [duplicate]

This question already has answers here:
Closed 11 years ago.
Possible Duplicates:
How do I prevent CSS inheritance?
is there a way to exclude a tag from css class
I have CSS like this
.div1 img {
// ...
}
.myimg {
// ...
}
and my HTML code is like this,
<div class="div1">
...
<img src="..." class="myimg"> // image html
...
</div>
The css formatting defined in .div1 img is obviously applied to the image html code. However, I actually don't want it happen. What can I do to not to have '.div1 img' effects on that image html code? I don't want to modify the content of div1 img or related html code because it is used in other places already (and it is a template code that I don't want to mess with).
P.S. I cannot remove or modify <div class="div1"> either because there is other template code around.
Thanks.
You have two options:
You can explicitly override all of the styling defined in .div1 img with what they should be in .myimg
You can write .div1 img:not(.myimg) for the first rule.
You could do:
.div1 img:not(.myimg) {
// ...
}
:not selector explained here
There is a nice little not selector that would work, but unfortunately it doesn't work in all browsers.
One sure way to do that is redefine all your .div1 styles in your child .mying class so it overrides the parent.
here is a little demo in jsfiddle: http://jsfiddle.net/u6MnN/1/
mess around with it and see what's best for you.
you need to neutralize all those stylings you are giving to ".div1 img" for example if you say "width:100px" there you need to say "width:auto" in the other one.
Although if you have lots of rules in the first set it would be very dirty this way and you need to change your layout.
If you have img tags inside a container div with class .div1 they will of course get the styling you define in .div1 img, but if you want lets say 2 images out of 8 in that div to have another style (which i believe is why you made class .myimg), you need to put !important after the defined stylings in .myimg like so:
.div1 img
{
height: 125px;
width: 125px;
}
.myimg
{
height: 150px !important;
width: 150px !important;
}
This is only if you are NOT using CSS 3.0

How to make a div invisible without commenting it out?

Is it possible to make a div invisible without commenting it out? If so, how?
You need to hide that with CSS:
div { /* this will hide all divs on the page */
display:none;
}
If it is a particular div with certain class or id, you can hide it like:
<div class="div_class_name">Some Content</div>
CSS:
div.div_class_name { /* this will hide div with class div_class_name */
display:none;
}
Or
<div id="div_id_name">Some Content</div>
CSS:
div#div_id_name { /* this will hide div with id div_id_name */
display:none;
}
Note: You need to wrap CSS tyles in between <style type="text/css"></style> tags, example:
<style type="text/css">
div#div_id_name {
display:none;
}
</style>
More Information :)
You can do this by inline style
<div style="display:none"></div>
or by defining CSS Style like
In css add
.HideableDiv{display:none;}
and in your HTML write
<div class="HideableDiv" ></div>
Its Easy. The only thing you need is, adding a style to it, like following example shows:
CSS:
<style type="text/css">
div.myInvisibleDiv {
overflow: hidden;
visibility: hidden;
height: 0;
width: 0;
}
</style>
HTML:
<div class="myInvisibleDiv"><p>My invisible content</p></div>
This div, and it content does definitely not show, and it wont disturb surrounding elements.
if you want it to be essentially gone from your layout:
.element_class {
display:none;
}
if you want to just make it invisible (but still keeping it's space seemingly empty)
.element_class {
visibility: hidden;
}
and then your element (if a div) would look like this:
<div class="element_class"></div>
basically anything you add the class="element_class" to will be either invisible or completely hidden.
position: absolute;
left: -99999px; /* big number */
will make the content accessible to most screen readers but will render the element off-screen.
May be, its not the required solution, but you can tackle this kind of issues by these little tricks.
You can use jQuery to achieve the solution.
If you want to totally hide/show the div, then you can use:
$('#my_element').show()
$('#my_element').hide()
Or if you want that your div become invisible and its still existing in the page, then you can use efficient trick:
$('#my_element').css('opacity', '0.0'); // invisible Maximum
$('#my_element').css('opacity', '1.0'); // visible maximum

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