I am making a user interface where I want each line to respond with a color effect when rolled over, coloring the entire background of that particular line in a given color. In addition, each line should contain several small symbols (buttons) that also should respond to user clicks and rollovers.
The only way I know to do this using the anchor tag, but once I have used that, I cannot nest another anchor within it. Is there a way to produce "nested buttons" or a workaround (preferrably not including javascript) to accomplish my goal here?
maralbjo
Your CSS file could contain:
li:hover {
background-color: #3f3; /* whatever color you want */
list-style: none;
}
Your HTML file could then just have a list of items:
<ul>
<li><img src="image.png" alt="mybutton"></li>
<li>Line</li>
<li>Goes</li>
<li>Here</li>
</ul>
You cannot make it work in older IE browsers without scripting. :(
I ended up doing what Dmitri Farkov proposed in his comment: adding hover behavior via script. There is an interesting alternative I used for a while, though: whatever:hover.
Maybe it will suit you better.
Related
Today I was trying to create a dummy css rule for testing and investigation.
.dummy {
some-style : somevalue;
}
Ideally the class should have no visible effect. I want to be able to apply the class to elements but cause the least visible effect possible on any elements it is applied to. For example
<div class="dummy"> should look and behaves as much as possible like <div>
I did not want the class to be empty. Can anyone suggest a style that I could add to the class that would have the least visible impact when applied to a general html element? I can't think of anything completely harmless.
UPDATE: I wanted to add the style to some existing html. The reason was to use the style as a marker for diagnostic purposes. It would help me see when and where styles and stylesheets were getting loaded/cached and where and why some styles were getting overridden, sometimes by the browser defaults which seemed odd. At the time I didn't have exclusive use of the system I was working on so I wanted something that was going to be invisible to other users but I could see in Developer Tools.
UPDATE 2 : the html/css wasn't written by me and I didn't have my own environment in which to work. I was trying to investigate some problems in-situ in someone else's system. I had tried using DevTools in the browser but wasn't getting anywhere with that. I wanted to be able to make some small changes to their html/css to aid my diagnostics. I didn't want them to have any obvious effect on the system for other people (except in DevTools, viewed by me).
It was a Wordpress site and they only had two environments, one for live and one for testing. I was working with the test system. There were other people testing at the time, though mainly checking content.
The real thorny problem was why was the font-size in the calendar widget much larger than everything else on the site? Inspecting using DevTools I could see the font-size style was getting overridden by the browser default style when it seemed to me there were other css selectors that should have taken precedence. It looked bizarre. In the end it turned out to be a missing !DOCTYPE tag in the html. So nothing to do with the css itself.
I didn't like this way of working, fiddling in someone's system, but there wasn't much else to do and it did help to resolve the problem for them.
Hopefully I don't have to do this again, but ever since I have been wondering what was the most harmless style that I could have used?
I thought I would ask here as there must be people who know CSS better than me.
You can use this:
.dummy{
min-width: 0;
min-height: 0;
}
If you just need anything beeing set you could assign rules that are default anyway. For block elements like div set
.block-class { display: block; }
And for inline elements like span
.inline-class { display: inline; }
Of course it could be an issue doing so in some rare cases but in general it's quite harmless I guess.
In principle, for any property you can have an arrangement like this:
div {
some-style : a-valid-value-for-some-style;
}
.dummy {
some-style : a-different-valid-value-for-some-style;
}
And .dummy's style will have an effect, no matter what some-style is.
Your best bet is to make use of CSS variables. These are custom properties and start with a double hyphen. so
.dummy {
--dummy-style: foo;
}
will make --dummy-style a property with value "foo". So long as you don't employ the variable as the value in another property, it will have no visible effect.
Right, so, I've been informed by a usually high-quality, reliable source that best practice when creating linked images that also include text is as follows:
Create some placeholder text inside the anchor element like this:
<a class="logoWithText" href="logoWithText.raw">Mr Happy Forever Foobar</a>
Change the element CSS to indent this text outside the viewing window:
.logoWithText {
background-image: logoWithText;
width = 200px;
height = 100px;
display: inline-block;
text-indent: -9999px;
}
The idea is that without doing this, if CSS is turned off on a user's machine, or they are trying to look at it with a screen reader, they're going to have problems viewing the image. But this way they will only see the text if CSS is switched off, and it will be positioned correctly.
But what if the image fails to load for some reason but they do have CSS switched on? The user is not going to see the placeholder text at all... and I'm also pretty uneasy about the whole put the text all of the way off the screen, as far as it can go as it seems pretty inelegant and I am worried there are likely to be all sort of unforeseen problems with writing code that's totally against the logic of the language in this way.
Can anyone suggest a solution which would account for both broken image links and a lack of CSS support on a user's device, and which would be more immediately intuitive to people viewing the code? If there's really no other way of doing this or you guys think my approach is totally wrong or whatever that's ok, I just want to know if I'm going about things the right way.
Why not
Html
<a href="http://yoururl.com" class="logo--text">
<img src="zoidberg.jpg" alt="This is the text that shows up when your image is broken">
</a>
CSS
.logo--text{ width:200px; height:100px; }
I don't have much experience in css. But I want to design a diagram in html. I need to design slimmer arrow (link) using css.
I thought of using image but I need arrows in different colors. Is there any possibilities by adding transparent arrow image and adding colour dynamically if yes provide sample code or any other suggestions also welcome. Kindly suggest me.
Try to use Font awsome LINK
HTML:
<i class="fa fa-arrow-right"></i> fa-arrow-right
Yes, there are several ways of doing this.
1. With an image
First of all, in order to do what you've suggested, you can indeed use an image - but instead of coloring the arrow, you would be coloring behind a cut-out of an arrow.
To do this, create the image of your arrow in a file format that supports transparency (PNG would be my recommendation). For example, a white square with the shape of an arrow 'cut out' of it, so that the arrow is entirely transparent (surrounded by white). It could look something like this in Photoshop;
Now, with your transparent PNG, insert the image into your code and surround it with a container - such as a DIV. You can then style the DIV (not the arrow), but the arrow will appear to change color.
Your HTML and CSS might look something like this;
<div style="background-color: red; display: inline-block; font-size: 0;">
<img src="arrow.png";>
</div>
background-color: ---; will determine the color of your arrow (you can also use hex values for better specificity - for example background-color: #CB0022;).
display: inline-block; is one possible way to keep your wrapping DIV under control. Without it, your background color will stretch to the full width of its parent container (possibly the entire page) - breaking the effect you're trying to create. Alternatively, you could also float the DIV, but this will complicate matters if you want the arrow to appear in the middle of text.
font-size: 0; is one possible solution to the common issue of extra space appearing around the image (and again, revealing unwanted background color where it shouldn't be).
The main downsides of using this technique are that manipulating images may be complicated depending on your precise layout/implementation. Also, the above example is suitable only for a page that has a white background. If you have a variety of background colors (or a more detailed/complex background, such as a photograph or pattern), this may be a very difficult solution to work with, because your arrow's 'box' is unlikely to match what's behind it.
2. With Unicode / HTML characters
Rather than using an image, you can use unicode characters to write out arrows as actual text. There are lots of these codes - and an example of them can be found here: HTML Arrow Codes
For example, your code might look like this;
<p style="font-size: 2em;">Why don't you look over there? → →
... or down there? ↙</p>
This would look something like this in a browser;
And then you could further style the arrows with <span> tags in order to change their size or color independently, like this;
<p style="font-size: 1.5em;">Why don't you look over there?
<span style="font-size: 4em; color: blue;">→</span>
<span style="font-size: 2.5em; color: darkgreen;">→</span>
... or down there? <span style="font-weight: bold; color: #CC0000;">↙</span></p>
Which would look something like this;
The main advantages here are that you will have no issues with matching against background color, you can more easily change the appearance of the arrow with code (CSS).
The downside is that using obscure characters and fonts can, in some cases, display inconsistently from device to device for a multitude of reasons I shan't burden you with right now. Suffice it to say, if you prefer this solution, be sure to test your results on as many different machines as you feel is appropriate.
Hope that's of use.
I have a button that, when hovered over, I would like the background image to display also. (It is an arrow an explanation of the button). There are quite a few questions similar, but I couldn't quite tweak the answers to work for me.
The HTML looks like
<div id="header_feedback">
<a href="#contactForm">
<img title="Add an Event" src="./img/header_feedback.png" alt="Give us your Feedback"/>
</a>
</div>
the CSS then is
#header_feedback
{margin-left:730px;
margin-top:-135px;
position:absolute;}
#header_feedback:hover
{
background: url ('./img/addevent_tip.png');
}
Any ideas hugely welcome!
The main problem here is not with your CSS. Itagi's answer correctly identified the minor issue that you can't have a space between url and the parens/address.
But there are two other bigger issues:
Invalid image url: when applied, background: url('./img/addevent_tip.png'); fails to find a valid image. To fix this, you either need two periods or zero. So either background: url('/img/addevent_tip.png'); or background: url('../img/addevent_tip.png');
Backgrounds applied to opaque images aren't visible: Since the entire content of the div is an image and that image has no transparency, you will not be able to see the on-hover change even when it happens correctly. You can adjust for this by making part of the image transparent (and, perhaps, setting a background for the non-hover state that leads it to look the way it normally does), or by abandoning the image in favor of CSS spriting.
you just need to change it the following way:
#header_feedback:hover
{
background: url('./img/addevent_tip.png');
}
no whitespace between 'url' and the actual url
#header_feedback a img{ display:none;}
#header_feedback a:hover img{display:block}
I have a list with custom image bullets. If the user hovers her mouse over the bullet image, I'd like to either:
display a title attribute, or
display helper text
I can use JavaScript-based solutions, if needed
My source looks like this:
<style>
li.important { list-style-image: url(important.png) }
</style>
<ul>
<li class="important">Test</li>
<li>Test</li>
</ul>
Edit: I want the mouseover/title text to appear only over the bullet, but not over the body of the <li>.
As far as I know, it's not possible to pickup a mouseover of the bullet rather than just the <li> item.
One alternative (which is a bit dirty, but hey) is to include your "bullet" as part of your markup.
<li><img src="important.gif" alt="Something" title="Hey! Useful info!" /> Test</li>
jQuery('li.important').mouseover();
I'm failing to see the problem with the first bullet point you mentioned:
http://jsfiddle.net/xrGqk/2/
Tested setting a title attribute on a custom image LI in Chrome, FF, IE7. Mouse over the image on the LI and the title pops up in all three browsers.
onmouseover seems to work fine as well:
http://jsfiddle.net/xrGqk/4/
You should have an alert when you mouse over the LI custom image bullet.
Give these a try and see if they work for you. If so, consider posting the code that is giving you problems.