I'm thinking on relying on box-shadow but it renders differently even on Firefox and Chrome/Chromium. The difference is very subtle with low values, but very noticeable with bigger ones.
In this example, you can see the differences arise when using negative values to make the shadow smaller. Left render is Chromium 25, right is Firefox 21.
HTML:
<div>
Hello there!
</div>
CSS:
div{
margin:100px;
padding:100px;
border:1px solid red;
box-shadow:0 80px 15px -85px #000;
}
How can I workaround this problem? Or maybe I should drop box-shadow by now?
Browsers use different algorithms to generate the shadow blur, in Chrome the opacity of shadow pixels decreases more quickly from the inner edge of the shadow area to the outer, and since the inner 1/3 of the shadow is hidden under the box in this example, it appears to look as having different start color. If we make the blur entirely visible by reducing the blur radius and the negative spread distance by 5px, and replace the solid shadow color with semi-transparent rgba(), the difference in the rendering becomes much less significant (demo).
Try to use the -moz-box-shadow property for firefox, it will render better.
div{
margin:100px;
padding:100px;
border:1px solid red;
-moz-box-shadow: 0 80px 15px -85px #000;
box-shadow:0 80px 15px -85px #000;
}
Related
This is for web dev. When using a 1px border radius on a circle or a square with really rounded corners, the stroke starts to break. If we were to change it to 2px's it would get better and better the more px we add. But is there a way to fix this problem with a 1px stroke?
background: rgba(32, 32, 32, .9);
height: 30px;
width: 30px;
border: 1px solid white;
border-radius: 20px;
:hover {
height: 300px;
width: 200px;
}
Images attached!
add box-shadow: 0 0 1px 0px white inset, 0 0 1px 0px white; that will give you the anti-aliasing you're looking for.
There isn't much you can do about this, unfortunately. That's up to the browser to determine how to render the sub-pixels that make up a curved 1px border. Some browsers will antialias it nicely, others will not.
The only reliable solution is to use images, which is so... 90s. Or something XD Point is, we shouldn't have to do things like that, but sometimes we have to either settle for imperfect rendering, or use outdated methods.
This is common when having a background and a border specified. The only way to fix this would be to have two separate elements, one with the background color and one with the border color with padding equal to the border-width.
See this article for a better explanation.
Assuming I have a set font color that I must maintain, and that it overlays content that can be of any color, how can I make sure the font is readable no matter what it's overlaying?
Here is a jsFiddle to demonstrate the effect I am trying to describe.
http://jsfiddle.net/4AUDr/
#overlay
{
position: relative;
top: -150px;
color: #860101;
}
Meme captions utilize white text with a black outline to make it readable over any hypothetical meme image, however I don't think there is a cross-browser compatible CSS only method of achieving that, and it would potentially look quite horrible with smaller fonts.
What solutions are there to this problem?
While text-shadow is nice, it doesn't actually give the result you want. A shadow is a shadow and what you need to have for most readable text is a "text border". Unfortunately. there is no such thing as text-border in css, but we can make one !
I am surprised by how much unpopular multiple shadows are. This is a case where by multiple shadows you can do miracles :
CSS
p {
color: white;
font-size: 20px;
text-shadow:
0.07em 0 black,
0 0.07em black,
-0.07em 0 black,
0 -0.07em black;
}
This style will simply add a thin shadow (as thin as 7% of your actual font-size) around your text (up, down, left, right).
But are four shadows enough ? Maybe you can get a better result with eight ? It looks like the answer is yes, makes sense to me, but it could also be that we are overkilling things here. Note that in this case I also decreased each shadow's size :
CSS
p.with-eight {
text-shadow:
0.05em 0 black,
0 0.05em black,
-0.05em 0 black,
0 -0.05em black,
-0.05em -0.05em black,
-0.05em 0.05em black,
0.05em -0.05em black,
0.05em 0.05em black;
}
Then in this markup in a colourful background you have a nicely readable text:
HTML
<html>
<body>
<p>This text is readable on any background.</p>
<p class="with-eight">This text is using eight text-shadows.</p>
</body>
</html>
JSFiddle example here
You can experiment with text-shadow property (MDN doc), for instance:
text-shadow: white 0px 0px 10px;
(jsFiddle)
It's supported in IE10. For IE9, you can use proprietary Internet Explorer filters as per this answer.
You can use the css3 property text-shadow
Warning: Browser compatibility problems (IE9 no support)
http://caniuse.com/css-textshadow
a simple example:
.shadow {text-shadow: 4px 4px 2px rgba(150, 150, 150, 1);}
http://jsfiddle.net/H4JtR/
If you use white shadow over black fonts, or vice-versa, your text will be readable no matter what is overlaying.
Another option is to use a background-color with transparency (you may want to apply this to an inline element like a span or a p instead of a div because background-color is going to apply to the whole div area even where there is no text)
background: rgba(33, 33, 33, .9);
http://jsfiddle.net/LSRkE/
Just use a transparency that contrasts with your font color. Then you can lower the alpha-channel value so the image from the background will be visible enough.
Related answer here https://stackoverflow.com/a/5135033/953684
Perhaps this CSS was not around at the time this question was answered, but you can use stroke to add a nice border around text. Like this:
-webkit-text-stroke-width: 1px;
-webkit-text-stroke-color: rgba(0, 0, 0, 1);
If you look at the main navigation menu on this page you see that I'm using a drop shadow on a:hover, however, in IE9 the shadow is buggy - it doesn't always show, and often remains after the hover is no longer active. I want to either fix it, or get rid of the shadow only in IE.
my css is:
#menu a {
color:#fff;
padding-top:10px;
padding-right:10px;
padding-left:10px;
text-decoration:none;
}
#menu a:hover {
background:#e58f56;
border-top: 0px solid transparent;
border-bottom: 10px solid transparent;
border-left: 10px solid #bbb2b1;
border-right: 0;
border-top-right-radius:5px;
border-bottom-right-radius:5px;
-webkit-box-shadow: #888 4px 4px 4px;
-moz-box-shadow: #888 4px 4px 4px;
box-shadow: #888 4px 4px 4px;
}
Any ideas?
I just dropped your code above into a js fiddle and it worked fine in IE9! Must be something to do with the 'pie' fix your calling in. Maybe try remove it and have a check.
The effect you are attempting is definitely 'do able' in IE9.. Don't give up:)!
Are you sure the shadow isn't showing at all? IE9's implementation of box-shadow renders the blur at about half the distance that other browsers do (I actually posted a question about that here). For low values, it's possible that IE9's rendering is so slight that you don't notice it. Just as a test, try making the blur radius much larger to see if it shows up in IE9.
If you dont see the DropShadow, it's probably that your IE9 is in Compatibility View Mode. Try to set explicitly in your page the compatibiltiy with IE9 with some code like:
<meta http-equiv="X-UA-Compatible" content="IE=8; IE=9; IE=10; IE=11" />
In the header of your page, before calling any Css.
I'm trying to get an effect like an inset drop shadow effect in CSS that looks like the following image:
(source: gyazo.com)
Does any body know how I can get that effect with CSS?
The key here is multiple box shadows, a larger darker one inset from the top left and a very subtle shadow below thats slightly brighter than the background.
Notice the form of box-shadow is "x-offset, y-offset, blur, color"
Learn to use the blur amounts and multiple shadows and you can make some really nice effects.
Example style (for display on a background of #222):
.button {
display:inline-block;
padding: 10px 15px;
color: white;
border-radius: 20px;
box-shadow: inset 2px 3px 5px #000000, 0px 1px 1px #333;
}
The answer has already been given to you (box-shadow: inset ..), so here's a quick demonstration of how it could work:
http://jsfiddle.net/L6nJj/
The important part is box-shadow: inset 2px 2px 3px 0 red.
For an explanation of the available options: https://developer.mozilla.org/en/css/box-shadow#Values
Be sure to take into account the browser support for box-shadow, which is that it doesn't work in older versions of IE, but works "everywhere" else: http://caniuse.com/css-boxshadow
Have a look at the CSS3 box-shadow property, in particular, inset box shadows. Example L in this article should provide the effect you're looking for.
Here's what I mean:
http://www.lesliesommer.com/wdw07/html/images/glow.png
I need it to work with most browsers.
Could you point me to a tutorial or something?
Thanks for the answers. Can I do it without CSS3 ?
css3 box shadows I'd think. These aren't implemented in IE8
-webkit-box-shadow: 0px 0px 15px #dddddd;
-moz-box-shadow: 0px 0px 15px #dddddd;
box-shadow: 0px 0px 15px #dddddd;
To add on to Groovetrain's answer, if you use rgba instead of a hex value you can have the colors be rendered with transparency letting whatever is below be seen through (which may or may not be valuable depending on the application).
-webkit-box-shadow: 0px 0px 15px rgba(0,0,0,0.35);
-moz-box-shadow: 0px 0px 15px rgba(0,0,0,0.35);
box-shadow: 0px 0px 15px rgba(0,0,0,0.35);
There are a few techniques for this (outside of CSS3).
If the width is fixed, one way is to use two DIVS. One has the top and the sides. You need to make and image that is very tall, with the sides repeating and the bottom cut off and use it as a background on the outer DIV. Then make an image that contains the bottom, and nest it inside, and absolutely-position it to the bottom.
<div class="wrapper">
... content ...
<div class="bottom"></div>
</div>
.wrapper {
width:500px;
background-image:url(....);
position:relative;
}
.bottom {
position:absolute;
bottom:0px;
height:20px;
width:500px;
background-image:url(....);
}
If it is x/y scaleable you can use the 9-slice method:
_|_|_
_|_|_
| |
You slice your background into 9 pieces, where the middle piece is blank and contains your content. You make four corners and use repeat-x / repeat-y for the background of the sides.
http://www.css3.info/preview/box-shadow/
However, needs a CSS3 enabled browser.
Alternatively set a background image to get cross browser support: http://dimox.net/cross-browser-css3-box-shadow/