I came across html>body in one of the stylesheets and wanted to know as to why it is used.
html>body {
font-size: 16px;
font-size: 78.75%;
}
It's called a Child Selector.
The reason it's being used is likely because it's a hack to exclude IE6 and below. Those browsers don't understand the > selector.
More Information
the '>' means that it is referencing on child elements of the parent (in this case 'html')
so for example I could have an arrangement of divs that look like so
<div id="outermost">
<div class="inner">
<div class="inner">
</div>
</div>
</div>
and i wrote some css like so
#outermost>.inner { background-color: #CCC; }
it would only apply the rules to the first level '#inner'
Obviously there is only one body tag however it used to be a hack to exclude ie6 and below to write different rules for ie7+ ;)
Child selector, more info here: http://www.w3.org/TR/CSS2/selector.html#child-selectors
So in your code it would be any body child of html
'> symbol indicates child of
Above code means
The style applies to all the tag body which is a child of html
#sample>div
above applies to all divs which are children of the element with id sample
Related
On this page, I want to hide the incorrect HTML displayed above the logo. It is generated by an old plugin we are replacing soon.
To start with, I tried the CSS:
.vine-home-block-grapes:first-child {display: none;}
but this does not remove the highlighted block below:
Can you help me determine why please?
Use css :first-of-type selector
.vine-home-block-grapes:first-of-type{
display:none;
}
That selector won't work as the element you are attempting to select is not the :first-child of its parent.
One way to do what you want is select all elements with that class name, set their styles as you wish and then, using a new rule with the sibling selector, override those styles for any element of that class appearing later in the parent.
.vine-home-block-grapes{
display:none;
}
.vine-home-block-grapes~.vine-home-block-grapes{
display:block;
}
Add this script. It would work fine without any problem:
<script>
var fourthChild = document.body.getElementsByTagName("div")[0];
document.body.removeChild(fourthChild);
</script>
Thanks to #FelixKling
Try wrapping the child elements in a <div> so the element can BE the first child of its wrapping element. Right now, your element is not the first child of <body> See the experiment here to show how :first-child doesn't work as expected, because really it's not the first child of its parent.
p:first-child {
background-color: aqua;
}
.vino:first-child {
background-color: lightgreen;
}
WORKS
<p>First</p>
<p>Second</p>
<p>Third</p>
DOESN'T WORK (because none of these are the first child of its parent, in this case, <body>
<p class="vino">First</p>
<p class="vino">Second</p>
<p class="vino">Third</p>
Adding a wrapping div works.
<div>
<p class="vino">First</p>
<p class="vino">Second</p>
<p class="vino">Third</p>
</div>
In my html page, I have div with id footer. Inside of that are couple of other divs, and last one of them has p-tag inside. How do I apply css style for that p?
#footer div p {
background-color: #000;
}
#footer div {
float: left;
width: 23%;
border-left: solid 1px;
margin: 0;
padding-left: 5px;
}
The first one does not seem to overwrite the second, which works fine. Could someone give me hint where to find information especially about the order of css selectors?
You can use the :last-child selector to target the last div and its containing <p> tags.
footer div:last-child p{color:#f00;}
Here is an example fiddle - http://jsfiddle.net/vuGpt/
And here is some further reading - http://www.w3schools.com/cssref/css_selectors.asp
There's no real order to CSS selectors, except the order you create. The styles you define will be overridden if you select the same element later in your css. You just have to be aware of how you are selecting your elemnts. A general selector will be overridden by a more specific selector. For example if you defined the following
p{color:#0f0;}
Then this selector will be overridden by your more direct selector as defined above. To overcome this, you can add !important to your rules. That way you can be reasonably sure that that style will be applied regardless of it being overridden later. Unless you accidently use !important again. It can become a mess quite quickly and with well written CSS you chould be able to avoid using !important at all...
Your resulting CSS for the above would become:
footer div:last-child p{color:#f00 !important;}
Hope this helps...
Your CSS is fine. I would suggest checking the structure of your HTML. From the CSS you provided the HTML should look as below:
<div id="footer">
<div></div>
<div>
<p>My paragraph</p>
</div>
</div>
I have tested this and all appears kosher. See fiddle.
I saw this selector in Twitter Bootstrap:
.show-grid [class*="span"] {
background-color: #eee;
text-align: center;
border-radius: 3px;
min-height: 30px;
line-height: 30px;
}
Does anyone know what this technique is called and what it does?
It's an attribute wildcard selector. In the sample you've given, it looks for any child element under .show-grid that has a class that CONTAINS span.
So would select the <strong> element in this example:
<div class="show-grid">
<strong class="span6">Blah blah</strong>
</div>
You can also do searches for 'begins with...'
div[class^="something"] { }
which would work on something like this:-
<div class="something-else-class"></div>
and 'ends with...'
div[class$="something"] { }
which would work on
<div class="you-are-something"></div>
Good references
CSS3 Attribute Selectors: Substring Matching
The 30 CSS Selectors you Must Memorize
W3C CSS3 Selectors
.show-grid [class*="span"]
It's a CSS selector that selects all elements with the class show-grid that has a child element whose class contains the name span.
The Following:
.show-grid [class*="span"] {
means that all child elements of '.show-grid' with a class that CONTAINS the word 'span' in it will acquire those CSS properties.
<div class="show-grid">
<div class="span">.span</div>
<div class="span6">span6</div>
<div class="attention-span">attention</div>
<div class="spanish">spanish</div>
<div class="mariospan">mariospan</div>
<div class="espanol">espanol</div>
<div>
<div class="span">.span</div>
</div>
<p class="span">span</p>
<span class="span">I do GET HIT</span>
<span>I DO NOT GET HIT since I need a class of 'span'</span>
</div>
<div class="span">I DO NOT GET HIT since I'm outside of .show-grid</span>
All of the elements get hit except for the <span> by itself.
In Regards to Bootstrap:
span6 : this was Bootstrap 2's scaffolding technique which divided a section into a horizontal grid, based on parts of 12. Thus span6 would have a width of 50%.
In the current day implementation of Bootstrap (v.3 and v.4), you now use the .col-* classes (e.g. col-sm-6), which also specifies a media breakpoint to handle responsiveness when the window shrinks below a certain size. Check Bootstrap 4.1 and Bootstrap 3.3.7 for more documentation. I would recommend going with a later Bootstrap nowadays
It selects all elements where the class name contains the string "span" somewhere. There's also ^= for the beginning of a string, and $= for the end of a string. Here's a good reference for some CSS selectors.
I'm only familiar with the bootstrap classes spanX where X is an integer, but if there were other selectors that ended in span, it would also fall under these rules.
It just helps to apply blanket CSS rules.
In my case I'm unable to apply background color for class due to dynamic change of class name with numbers
Ex:
Issue:
body .ForwardRef-root-198 .aura-ag-grid .ag-row:hover, body .ForwardRef-root-198 .ag-details-grid .ag-row:hover {
background-color: #2196f35c !important;
}
Solution:
body div[class*="ForwardRef-root-"] .aura-ag-grid .ag-row:hover, body div[class*="ForwardRef-root-"] .ag-details-grid .ag-row:hover {
background-color: #2196f35c !important;
}
Reference: link
Say i have this markup:
<div class='current'>
</div>
<div class='current'>
</div>
<div class='current'>
</div>
<div class='current'>
</div>
<div class='current'>
</div>
Now these divs are not necessarily next to each other in the markup, but could be spread throughout the page.
Can i target only the first occurrence of class "current" using CSS only, i'd ideally like to avoid using javascript (for now)?
Ie.
.current:first-child {
background: red;
}
I believe you're looking for something like this:
.current:nth-child(1){
background:red;
}
Should do the trick!
:first-child targets elements that are first children, not first occurrence of a given class. So this will target all elements with current class, that are first children. It can be all of them if they are in different places on a page or none at all.
It sounds like you may be looking for css3 selector first-of-type
As mentioned in these two answers (along with this new one), CSS3 doesn't bake in a pseudo-class that selects the first element of its class (unlike :first-of-type which selects by type).
You can always use :first-child if .current is guaranteed to be the first child of .group:
.group .current:first-child {
background: red;
}
But if it's not guaranteed to be, then based on your comments and the answer link, since they all share the same parent you can do this instead:
.group .current {
background: red;
}
.group .current ~ .current {
background: transparent; /* Or whatever your default is */
}
The general sibling combinator ~ ignores other elements that may not be .current. All these rules work in IE7+.
If they are spread throughout the page, you can not get what you need with pure CSS solution. Even with first-of-type unless the elements are on the same DOM level. Check the example to see that you can not select the elements.
On the other hand once I move the third .current to the same DOM level where I already have the second one, I get only the second item selected, as it's the first .current on this level.
On the other hand it's a very short one-liner in JS
Don't overcomplicate things ;)
If it's spread throughout the page, you can't target it with css.
I have something like:
<div id="content>
<h1>Welcome to Motor City Deli!</h1>
<div style=" font-size: 1.2em; font-weight: bolder;">Sep 19, 2010</div>
<div > ... </div>
What is the css selector for the second div (1st div within the "content" div) such that I can set the font color of the date within that div?
The MOST CORRECT answer to your question is...
#content > div:first-of-type { /* css */ }
This will apply the CSS to the first div that is a direct child of #content (which may or may not be the first child element of #content)
Another option:
#content > div:nth-of-type(1) { /* css */ }
You want
#content div:first-child {
/*css*/
}
If we can assume that the H1 is always going to be there, then
div h1+div {...}
but don't be afraid to specify the id of the content div:
#content h1+div {...}
That's about as good as you can get cross-browser right now without resorting to a JavaScript library like jQuery. Using h1+div ensures that only the first div after the H1 gets the style. There are alternatives, but they rely on CSS3 selectors, and thus won't work on most IE installs.
The closest thing to what you're looking for is the :first-child pseudoclass; unfortunately this will not work in your case because you have an <h1> before the <div>s. What I would suggest is that you either add a class to the <div>, like <div class="first"> and then style it that way, or use jQuery if you really can't add a class:
$('#content > div.first')