I'm trying to get my head around the not selector is css. I'm trying to hide a div called "InfoRow" if the page doesn't have a class of 'home'
My first stab at this:
:not(body.home #InfoRow) {
display:none;
}
From MDN:
The :not() CSS pseudo-class represents elements that do not match a list of selectors. Since it prevents specific items from being selected, it is known as the negation pseudo-class.
:not(.foo) will match anything that isn't .foo, including <html> and <body>
As the class .home would be set on the <body> tag, and #InfoRow is a child of <body>, you'd have to write it like this:
body:not(.home) #InfoRow {
display: none;
}
Related
i have the following Div:-
<div data-automation-id="pageHeader" class="bc_bi_ada2ac09 rn_bi_ada2ac09">
and i am trying to hide it using this css, but the div is not been hide:-
[data-automation-id]="pageHeader"
{
display:none;
}
any advice?
Your selector syntax is a bit off. It should be element[attribute="value"] to style a element from it's custom attribute. Attribute Selectors - MDN
div[data-automation-id="pageHeader"] {
display: none;
}
<div data-automation-id="pageHeader" class="bc_bi_ada2ac09 rn_bi_ada2ac09">Text</div>
If the HTML element won't always be a <div>, you can also use this selector syntax [attr=value] which represents elements with an attribute name of attr whose value is exactly value.
[data-automation-id=pageHeader] {
display: none;
}
<div data-automation-id="pageHeader" class="bc_bi_ada2ac09 rn_bi_ada2ac09">Text</div>
How can I write :hover and :visited condition for a:before?
I'm trying a:before:hover, but it's not working.
This depends on what you're actually trying to do.
If you simply wish to apply styles to a :before pseudo-element when the a element matches a pseudo-class, you need to write a:hover:before or a:visited:before instead. Notice the pseudo-element comes after the pseudo-class (and in fact, at the very end of the entire selector). Notice also that they are two different things; calling them both "pseudo-selectors" is going to confuse you once you run into syntax problems such as this one.
If you're writing CSS3, you can denote a pseudo-element with double colons to make this distinction clearer. Hence, a:hover::before and a:visited::before. But if you're developing for legacy browsers such as IE8 and older, then you can get away with using single colons just fine.
This specific order of pseudo-classes and pseudo-elements is stated in the spec:
One pseudo-element may be appended to the last sequence of simple selectors in a selector.
A sequence of simple selectors is a chain of simple selectors that are not separated by a combinator. It always begins with a type selector or a universal selector. No other type selector or universal selector is allowed in the sequence.
A simple selector is either a type selector, universal selector, attribute selector, class selector, ID selector, or pseudo-class.
A pseudo-class is a simple selector. A pseudo-element, however, is not, even though it resembles a simple selector.
However, for user-action pseudo-classes such as :hover1, if you need this effect to apply only when the user interacts with the pseudo-element itself but not the a element, then this is not possible other than through some obscure layout-dependent workaround. As implied by the text, standard CSS pseudo-elements cannot currently have pseudo-classes. In that case, you will need to apply :hover to an actual child element instead of a pseudo-element.
1 Of course, this does not apply to link pseudo-classes such as :visited as in the question, since pseudo-elements aren't links.
Write a:hover::before instead of a::before:hover: example.
To change a menu link's text on mouseover (different language text on hover), here is the
jsfiddle example
HTML:
<a align="center" href="#"><span>kannada</span></a>
CSS:
span {
font-size: 12px;
}
a {
color: green;
}
a:hover span {
display: none;
}
a:hover:before {
color: red;
font-size: 24px;
content: "ಕನ್ನಡ";
}
Try to use .card-listing:hover::after, hover, and after using ::. It will work.
Or you can set pointer-events:none to your a element and pointer-event:all to your a:before element, and then add hover CSS to a element:
a{
pointer-events: none;
}
a:before{
pointer-events: all
}
a:hover:before{
background: blue;
}
BoltClock's answer is correct. The only thing I want to append is that if you want to only select the pseudo element, put in a span.
For example:
<li><span data-icon='u'></span> List Element </li>
instead of:
<li> data-icon='u' List Element</li>
This way you can simply say
ul [data-icon]:hover::before {color: #f7f7f7;}
which will only highlight the pseudo element, not the entire li element.
You can also restrict your action to just one class using the right pointed bracket (">"), as I have done in this code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
span {
font-size: 12px;
}
a {
color: green;
}
.test1>a:hover span {
display: none;
}
.test1>a:hover:before {
color: red;
content: "Apple";
}
</style>
</head>
<body>
<div class="test1">
<span>Google</span>
</div>
<div class="test2">
<span>Apple</span>
</div>
</body>
</html>
Note: The hover:before switch works only on the .test1 class
Here is my code
<span></span>
<div class='box'>title</div>
<style>div.box:nth-child(1) { color: red; }</style>
It works when I delete the span tag or any other tag which is over the box, but not when I leave it as is. Why is it so?
Use :nth-of-type .
Basically :nth-child counts ALL the siblings. Regardless of type of element. However :nth-of-type takes into account the element selected.
Because the div is now the second child. Use :nth-of-type(n) instead.
<style>
div.box:nth-of-type(1) { color: red; }
</style>
That will select the first div
How can I write :hover and :visited condition for a:before?
I'm trying a:before:hover, but it's not working.
This depends on what you're actually trying to do.
If you simply wish to apply styles to a :before pseudo-element when the a element matches a pseudo-class, you need to write a:hover:before or a:visited:before instead. Notice the pseudo-element comes after the pseudo-class (and in fact, at the very end of the entire selector). Notice also that they are two different things; calling them both "pseudo-selectors" is going to confuse you once you run into syntax problems such as this one.
If you're writing CSS3, you can denote a pseudo-element with double colons to make this distinction clearer. Hence, a:hover::before and a:visited::before. But if you're developing for legacy browsers such as IE8 and older, then you can get away with using single colons just fine.
This specific order of pseudo-classes and pseudo-elements is stated in the spec:
One pseudo-element may be appended to the last sequence of simple selectors in a selector.
A sequence of simple selectors is a chain of simple selectors that are not separated by a combinator. It always begins with a type selector or a universal selector. No other type selector or universal selector is allowed in the sequence.
A simple selector is either a type selector, universal selector, attribute selector, class selector, ID selector, or pseudo-class.
A pseudo-class is a simple selector. A pseudo-element, however, is not, even though it resembles a simple selector.
However, for user-action pseudo-classes such as :hover1, if you need this effect to apply only when the user interacts with the pseudo-element itself but not the a element, then this is not possible other than through some obscure layout-dependent workaround. As implied by the text, standard CSS pseudo-elements cannot currently have pseudo-classes. In that case, you will need to apply :hover to an actual child element instead of a pseudo-element.
1 Of course, this does not apply to link pseudo-classes such as :visited as in the question, since pseudo-elements aren't links.
Write a:hover::before instead of a::before:hover: example.
To change a menu link's text on mouseover (different language text on hover), here is the
jsfiddle example
HTML:
<a align="center" href="#"><span>kannada</span></a>
CSS:
span {
font-size: 12px;
}
a {
color: green;
}
a:hover span {
display: none;
}
a:hover:before {
color: red;
font-size: 24px;
content: "ಕನ್ನಡ";
}
Try to use .card-listing:hover::after, hover, and after using ::. It will work.
Or you can set pointer-events:none to your a element and pointer-event:all to your a:before element, and then add hover CSS to a element:
a{
pointer-events: none;
}
a:before{
pointer-events: all
}
a:hover:before{
background: blue;
}
BoltClock's answer is correct. The only thing I want to append is that if you want to only select the pseudo element, put in a span.
For example:
<li><span data-icon='u'></span> List Element </li>
instead of:
<li> data-icon='u' List Element</li>
This way you can simply say
ul [data-icon]:hover::before {color: #f7f7f7;}
which will only highlight the pseudo element, not the entire li element.
You can also restrict your action to just one class using the right pointed bracket (">"), as I have done in this code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
span {
font-size: 12px;
}
a {
color: green;
}
.test1>a:hover span {
display: none;
}
.test1>a:hover:before {
color: red;
content: "Apple";
}
</style>
</head>
<body>
<div class="test1">
<span>Google</span>
</div>
<div class="test2">
<span>Apple</span>
</div>
</body>
</html>
Note: The hover:before switch works only on the .test1 class
Hello is there a way with css to style the 2nd element on page with the same class slightly differently to the first.
For example I have two ul's on a page with a class of topbardropdownmenu. I want to give the 2nd ul a differen't background to the first. Is there a way to do this with out altering the html?
You can do it with the :nth-child() pseudo-selector. It is CSS3 though, and not supported in some browsers (e.g. <=IE8 & <=FF3.0 doesnt support it).
.topbardropdownmenu:nth-child(2) { background: #FF0000; }
You could do it with JavaScript in a cross-browser compatible way though, if that's an option for you.
What holds the <ul> elements? I'll assume a <div id = "lists">
/* First element */
div > ul.topbardropdownmenu:first-child{
}
/* Rest of the elements */
div > ul.topbardropdownmenu{
}
...alternatively
div > ul.topbardropdownmenu:not(:first-child)
It depends which browsers your users are using, you might be able to use the nth-of-type css pseudo-selector:
ul.topbardropdownmenu:nth-of-type(2) {
/* styles the second ul of class=topbardropdownmenu
}
If there's a particular pattern to the occurrence of these ul elements, you could use descendant and/or sibling selectors:
div > ul.topbardropdownmenu {
/* styles all ul.topbardropdownmenu that are the immediate descendants of a div */
}
p + ul.topbardropdownmenu {
/* styles all ul.topbardropdownmenu that immediately follow a p */
}
Look at the CSS3 nth-child() pseudo-class.
You can use :nth-child http://css-tricks.com/how-nth-child-works/ but IE may struggle with it. Consider this jQuery alternative:
$(".class").eq(1).css();
http://api.jquery.com/eq/