I have a case where I must write inline CSS code, and I want to apply a hover style on an anchor.
How can I use a:hover in inline CSS inside the HTML style attribute?
E.g., you can't reliably use CSS classes in HTML emails.
Short answer: you can't.
Long answer: you shouldn't.
Give it a class name or an id and use stylesheets to apply the style.
:hover is a pseudo-selector and, for CSS, only has meaning within the style sheet. There isn't any inline-style equivalent (as it isn't defining the selection criteria).
Response to the OP's comments:
See Totally Pwn CSS with Javascript for a good script on adding CSS rules dynamically. Also see Change style sheet for some of the theory on the subject.
Also, don't forget, you can add links to external stylesheets if that's an option. For example,
<script type="text/javascript">
var link = document.createElement("link");
link.setAttribute("rel","stylesheet");
link.setAttribute("href","http://wherever.com/yourstylesheet.css");
var head = document.getElementsByTagName("head")[0];
head.appendChild(link);
</script>
Caution: the above assumes there is a head section.
You can get the same effect by changing your styles with JavaScript in the onMouseOver and onMouseOut parameters, although it's extremely inefficient if you need to change more than one element:
<a href="abc.html"
onMouseOver="this.style.color='#0F0'"
onMouseOut="this.style.color='#00F'" >Text</a>
Also, I can't remember for sure if this works in this context. You may have to switch it with document.getElementById('idForLink').
You could do it at some point in the past. But now (according to the latest revision of the same standard, which is Candidate Recommendation) you can't
.
You can't do exactly what you're describing, since a:hover is part of the selector, not the CSS rules. A stylesheet has two components:
selector {rules}
Inline styles only have rules; the selector is implicit to be the current element.
The selector is an expressive language that describes a set of criteria to match elements in an XML-like document.
However, you can get close, because a style set can technically go almost anywhere:
<html>
<style>
#uniqueid:hover {do:something;}
</style>
<a id="uniqueid">hello</a>
</html>
If you actually require inline code, this is possible to do. I needed it for some hover buttons, and the method is this:
.hover-item {
background-color: #FFF;
}
.hover-item:hover {
background-color: inherit;
}
<a style="background-color: red;">
<div class="hover-item">
Content
</div>
</a
In this case, the inline code: "background-color: red;" is the switch colour on hover. Use the colour you need and then this solution works. I realise this may not be the perfect solution in terms of compatibility, however this works if it is absolutely needed.
While it appears to be impossible to define a hover-rule inline, you can define the value of styles inline using a CSS variable:
:hover {
color: var(--hover-color);
}
<a style="--hover-color: green">
Library
</a>
Consider using an attribute or a class in addition to the selector (e.g., [hover-color]:hover) to allow coexistence with other low specificity hover color changing rules (from, e.g., a CSS reset or some elements using the default style).
Using JavaScript:
a) Adding inline style
document.head.insertAdjacentHTML('beforeend', '<style>#mydiv:hover{color:red;}</style>');
b) or a bit harder method - adding "mouseover"
document.getElementById("mydiv").onmouseover= function(e){this.className += ' my-special-class'; };
document.getElementById("mydiv").onmouseleave= function(e){this.className = this.className.replace('my-special-class',''); };
Note: multi-word styles (i.e.font-size) in JavaScript are written together:
element.style.fontSize="12px"
This is the best code example:
<a
style="color:blue;text-decoration: underline;background: white;"
href="http://aashwin.com/index.php/education/library/"
onmouseover="this.style.color='#0F0'"
onmouseout="this.style.color='#00F'">
Library
</a>
Moderator Suggestion: Keep your separation of concerns.
HTML
<a
style="color:blue;text-decoration: underline;background: white;"
href="http://aashwin.com/index.php/education/library/"
class="lib-link">
Library
</a>
JS
const libLink = document.getElementsByClassName("lib-link")[0];
// The array 0 assumes there is only one of these links,
// you would have to loop or use event delegation for multiples
// but we won't go into that here
libLink.onmouseover = function () {
this.style.color='#0F0'
}
libLink.onmouseout = function () {
this.style.color='#00F'
}
Inline pseudoclass declarations aren't supported in the current iteration of CSS (though, from what I understand, it may come in a future version).
For now, your best bet is probably to just define a style block directly above the link you want to style:
<style type="text/css">
.myLinkClass:hover {text-decoration:underline;}
</style>
Foo!
As pointed out, you cannot set arbitrary inline styles for hover, but you can change the style of the hover cursor in CSS using the following in the appropriate tag:
style="cursor: pointer;"
<style>a:hover { }</style>
Go Home
Hover is a pseudo class, and thus cannot be applied with a style attribute. It is part of the selector.
You can do this. But not in inline styles. You can use onmouseover and onmouseout events:
<div style="background: #333; padding: 10px; cursor: pointer"
onmouseover="this.style.backgroundColor='#555';" onmouseout="this.style.backgroundColor='#333';">
Hover on me!
</div>
According to your comments, you're sending a JavaScript file anyway. Do the rollover in JavaScript. jQuery's $.hover() method makes it easy, as does every other JavaScript wrapper. It's not too hard in straight JavaScript either.
There is no way to do this. Your options are to use a JavaScript or a CSS block.
Maybe there is some JavaScript library that will convert a proprietary style attribute to a style block. But then the code will not be standard-compliant.
You can write code in various type.
First I can write this
HTML
<a href="https://www.google.com/" onMouseOver="this.style.color='red'"
onMouseOut="this.style.color='blue'" class="one">Hello siraj</a>
CSS
.one {
text-decoration: none;
}
You can try another way:
HTML
Hello siraj
CSS
.one {
text-decoration: none;
}
.one:hover {
color: blue;
}
.one:active {
color: red;
}
You can also try hover in jQuery:
JavaScript
$(document).ready(function() {
$("p").hover(function() {
$(this).css("background-color", "yellow");
}, function() {
$(this).css("background-color", "pink");
});
});
HTML
<p>Hover the mouse pointer over this paragraph.</p>
In this code you have three functions in jQuery. First you ready a function which is the basic of a function of jQuery. Then secondly, you have a hover function in this function. When you hover a pointer to the text, the color will be changed and then next when you release the pointer to the text, it will be the different color, and this is the third function.
I just figured out a different solution.
My issue: I have an <a> tag around some slides/main content viewer as well as <a> tags in the footer. I want them to go to the same place in IE, so the whole paragraph would be underlined onHover, even though they're not links: the slide as a whole is a link. IE doesn't know the difference. I also have some actual links in my footer that do need the underline and color change onHover. I thought I would have to put styles inline with the footer tags to make the color change, but advice from above suggests that this is impossible.
Solution: I gave the footer links two different classes, and my problem was solved. I was able to have the onHover color change in one class, have the slides onHover have no color change/underline, and still able to have the external HREFS in the footer and the slides at the same time!
It's not exactly inline CSS, but it is inline.
<a href="abc.html" onMouseOver="this.style.color='#0F0'"
onMouseOut="this.style.color='#00F'">Text</a>
I agree with shadow. You could use the onmouseover and onmouseout event to change the CSS via JavaScript.
And don't say people need to have JavaScript activated. It's only a style issue, so it doesn't matter if there are some visitors without JavaScript ;)
Although most of Web 2.0 works with JavaScript. See Facebook for example (lots of JavaScript) or Myspace.
So this isn't quite what the user was looking for, but I found this question searching for an answer and came up with something sort of related. I had a bunch of repeating elements that needed a new color/hover for a tab within them. I use handlebars, which is key to my solution, but other templateing languages may also work.
I defined some colors and passed them into the handlebars template for each element. At the top of the template I defined a style tag, and put in my custom class and hover color.
<style type="text/css">
.{{chart.type}}-tab-hover:hover {
background-color: {{chart.chartPrimaryHighlight}} !important;
}
</style>
Then I used the style in the template:
<span class="financial-aid-details-header-text {{chart.type}}-tab-hover">
Payouts
</span>
You may not need the !important
While the "you shouldn't" context may apply there may be cases were you still want to achieve this. My use case was to dynamic set a hover color depending on some data value to achieve that with only CSS you can benefit from specificity.
Approach CSS only
CSS
/* Set your parent color for the inherit property */
.sidebar {
color: green;
}
/* Make sure your target element "inherit" parent color on :hover and default */
.list-item a {
color: inherit
}
.list-item a:hover {
color: inherit
}
/* Create a class to allows to get hover color from inline style */
.dynamic-hover-color:not(:hover) {
color: inherit !important;
}
Then your markup will be somewhat like:
Markup
<nav class="sidebar">
<ul>
<li class="list-item">
<a
href="/foo"
class="dynamic-hover-color"
style="color: #{{category.color}};"
>
Category
</a>
</li>
</ul>
</nav>
I'm doing this example using handlebars but the idea is that you take whatever is convenient for your use case to set the inline style (even if it is writing manually the color on hover you want)
You can just use an inline stylesheet statement like this:
<style>#T1:hover{color:red}</style><span id=T1>Your Text Here</span>
You can use the pseudo-class a:hover in external style sheets only. Therefore I recommend using an external style sheet. The code is:
a:hover {color:#FF00FF;} /* Mouse-over link */
You can do id by adding a class, but never inline.
<style>.hover_pointer{cursor:pointer;}</style>
<div class="hover_pointer" style="font:bold 12pt Verdana;">Hello World</div>
It is two lines, but you can reuse the class everywhere.
My problem was that I'm building a website which uses a lot of image-icons that have to be swapped by a different image on hover (e.g. blue-ish images turn red-ish on hover).
I produced the following solution for this:
.container div {
width: 100px;
height: 100px;
background-size: 100px 100px;
}
.container:hover .withoutHover {
display: none;
}
.container .withHover {
display: none;
}
.container:hover .withHover {
display: block;
}
<p>Hover the image to see it switch with the other. Note that I deliberately used inline CSS because I decided it was the easiest and clearest solution for my problem that uses more of these image pairs (with different URL's).
</p>
<div class=container>
<div class=withHover style="background-image: url('https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcQrqRsWFJ3492s0t0NmPEcpTQYTqNnH188R606cLOHm8H2pUGlH')"></div>
<div class=withoutHover style="background-image: url('http://i.telegraph.co.uk/multimedia/archive/03523/Cat-Photo-Bombs-fa_3523609b.jpg')"></div>
</div>
I introduced a container containing the pair of images. The first is visible and the other is hidden (display:none). When hovering the container, the first becomes hidden (display:none) and the second shows up again (display:block).
My question is, how to manipulate this line in css by time with like a javascript code, for an other image? Like a slideshow!
If it's only possible in that way, in another code language.
.header { background: url(../img.jpg); }
You can use jQuery's css function to do it:
$(".header").css("background", "../img/bg2.jpg");
You have to add background property into style attribute. because you have no chance go to css file via js
I'm scraping this news website: http://www.nu.nl/
If you open console and type:
$('*').css('background', 'none');
You will see all the background properties being removed, except for one which is the "blue" squire in the first article. When I trace the original CSS I see it has the !important declaration assigned to it. I don't know whether this is causing its persistence. What can I try to get rid of that blue background in terms of Jquery and Javascript or CSS?
Please note I don't want to target the element itself but rather keep using the all (*) selector or some Javascript equivalent.
jQuery doesn't recognize the !important attribute in css definitions. You just need a more specific hierarchical selector here. Simply make a new class, and then use addClass.
$('head').append('<style type="text/css">html #page .noBG{ background:none !important; }</style>');
Then just add that class to everything.
$('*').addClass('noBG');
Edit
Based on comments below, you could try
$('head').append('<style type="text/css">html body#noBG *{ background:none !important; }</style>');
Then add the ID to the body
$('body').prop('id', 'noBG');
Which is a pretty specific selector. Some rules may still pass this, and you'll have to experiment with different variations depending on the scenario.
I have found out that if we write inline css (or add it using JavaScript), then we lose the value of css hover. Is it possible to change such behavior?
Simple example
<div id="test" style="color: red">test</div>
<style>
#test:hover {
color:blue;
}
</style>
In this case hover doesn't work.
Update
I can't use !important, because after it I will not be able to change that atribute via JavaScript.
Also I generate styles dynamically, so I can't add specific classes via JavaScript.
because inline css overrides your css styles in the file
if you had
color: blue !important
it would work but not recommended, you can always use jquery to remove the inline style tag though haha
Update:
remove the style tag using jquery or when using javascript... add !important so the inline css would have important
I can't use !important, because after it i will not be able to change
that atribute via javascript.
You can still use !important, just add a class with JavaScript and remove it anytime you want.
demo
The easiest way to go is the following
$(selector).hover(function() {
$st = $(this).attr("style");
$(this).attr("style","");
},function() {
$(this).attr("style",$st);
});
In CSS, the style attribute will override any style elements or stylesheets. If you cannot change the the style attribute, you'll have to use !important. If you can remove the style attribute altogether and place everything in the style element. Or even better, in a separate stylesheet your problem will be fixed.
P.S. The type attribute is required on style elements. This won't fix your problem, but you should change <style> to <style type="text/css">
I've tried to do it by css, using:
#mainmenu ul li:hover a
{
color: #000000;
}
But it is not working, then i tried using jQuery, with:
function change()
{
$(this).find('a').css('color','#000000');
}
Calling onMouseOver inside the <li>, but it is also not working...
Any idea?
Try with color: black !important and if it works then look for the style overriding it and re-organize your code.
The CSS code posted works when tested with the simplest possible HTML like
<div id=mainmenu>
<ul><li><a href=foo>link</ul>
</div>
and with no other style sheet used. This means that in your real page, there is either some error in HTML syntax or, more probably, some other style sheet rule that overrides this rule.
Thus, you should analyze and modify the style sheets. If you need further help, you should post minimal code that still exhibits the problem.
Using !important can be useful in making sure that it’s not an HTML problem or typo in CSS code, but !important should rarely be used on live pages, especially in cases where you don’t really know how your style sheets work together.
Just try hovering
#mainmenu ul li a:hover
{
color: #000000;
}
I think CSS can handle your problem anyway if you want to solve using jquery you can use this link Jquery Hyperlink Plugins