I would like to create an rectangular overlay where the border is semi-transparent and the inner area is not transparent.
If I tweak the opacity parameter of the outer div (that contains the border) - than all the internal elements become transparent as well, which is unwanted.
Please advice.
Try this instead of using opacity, if you are alright with using CSS3:
border: 2px solid rgba(255, 0, 0, 0.5);
That should give you solid red that is 50% transparent. Check out this intro to rgba if you want more info.
EDIT
If you aren't using an actual border, note that rgba can be used in any place where CSS expects a color, like background-color.
Related
Is it possible to make a part of image gradient on an existing background?
The result as in the example picture you added can be achieved by using 2 containers, one with a background image, the other (which lies on top of the first) uses a CSS gradient background, where one of the gradient colors has an alpha of 0 (i.e. is transparent).
For more info on CSS gradients see: https://developer.mozilla.org/nl/docs/Web/CSS/CSS_Images/Using_CSS_gradients
to make a gradient that is transparent on one side, use rgba color, for example:
#grad1 {
height: 200px; width:500px;
background: linear-gradient(to right, rgba(255,0,0,1), rgba(255,0,0,0));
}
The a in rgba stands for alpha, it is the transparency an has a value between 1(opaque) and 0(transparent)
So, here is JSFIDDLE.
Here, you see header with background color gradient:
background: linear-gradient(to right, #827099 0%, #dc5562 100%)
I also have span with :before css attribute that mimics the background color behind it.
The purpose of this is to get a "cut" feature as a part of the word "THIS". You will notice that a top left portion of "T" is missing or more like hidden behind the :before attribute.
The issue I am having is that since the background color is linear-gradient, when the screen width changes, so does the linear-gradient (you can see by making the browser window smaller)
This change in the gradient does not reflect on the :before attribute and it no longer matches the background color.
Is there a way to fix this while keeping the linear-gradient of the background?
Not sure if this is an option for your use case, but you could set the linear gradient to ensure that the color change doesn't happen until after it clears the cutout.
You would set the first stop in the gradient to be the width of the padding (118px) plus the width of the clip border (21px) and then change the clip border colors to be the same as the starting color of the gradient. In the example below I rounded up to 140px.
https://jsfiddle.net/6dvy7dks/
.head {
background: linear-gradient(to right, #827099 140px, #dc5562 100%);
}
span.first:before {
border-top-color: #827099;
border-left-color: #827099;
}
I want to make my webpage with a background-color with opacity: 0.5 but the content inside the webpage will have an opacity: 1, as the default value.
The problem is that if I set opacity: 0.5 to the container, all the childs inside this container gets the same opacity value.
I have searched about opacity specifications and saw this:
Inherited No
but in my case it is being inherited so I have searched a bit more and found another transparency specification in which I saw this:
If the object is a container element, then the effect is as if the contents of the container element were blended against the current background using a mask where the value of each pixel of the mask is .
So, as it seems that it is impossible to set a parent with less opacity than its childs, is there some workaround to get it?
Note: I think that in this case is not very important to add code (because you can reproduce it easily) but here I have created a simple JSFiddle "to play" with it.
Thanks in advance!
No, it's not possible.
If you only want a semi-transparent background without affecting contents, you can use a rgba color.
The RGB color model is extended in this specification to include
“alpha” to allow specification of the opacity of a color.
For example,
body {
background: linear-gradient(to right, #fff, #ff0, #0ff);
}
p {
background-color: rgba(0, 0, 255, 0.3); /* semi-transparent solid blue */
padding: 70px;
}
<p>Semi-transparent background but fully opaque text</p>
Not possible. Opacity to a parent container will also apply to the children. If you want to have a background with an opacity effect you could use RGBA for the background color. This applies to solid colors and there is an option for working with gradients as well.
If you have an image you want to use, you could position absolute the image behind your content using a div/container. Give that container an opacity and a position.
I read this article http://heygrady.com/blog/2011/08/06/recreating-photoshop-drop-shadows-in-css3-and-compass/ many times. But I can't find the correct way to convert drop shadow of PSD to box shadow of CSS3 in this case:
Stroke: #E4E4E4; opacity 75%
Inner glow: #FFFFFF 50%; opacity 75%
Drop shadow: Angle=90 degrees; distance=1px; spread=5%; size=9px
border: 1px solid rgba(228,228,228,0.75);
box-shadow: inset 0 0 0 9px rgba(255,255,255,0.75), 0 1px 9px 0 rgba(0,0,0,.5);
I had to guess here a bit as there’s missing information. The rgba(r,g,b,a) colour syntax takes a value of 0–255 for each of the colour components and a 0–1 value for the opacity of the colour. So the border rule is equivalent to Photoshop stroke.
There’s no direct equivalent of an inner glow but you can do an inset box shadow which can simulate it. You specify multiple shadows with a comma on the same rule, so the first one can be the inset shadow. This is specified with an inset keyword to start with, then the x and y offset (none in this case), then a blur radius, then a spread distance, then finally the colour of the shadow. Play with the values; I guessed at 9px for the spread and 0 for the rest.
Finally, we specify a box shadow for the outside. The same rules apply as to the inset shadow (again with my guessing to the values). Have a play around!
There is a cloud based Photoshop extension that you can download and install in photo shop here: http://css3ps.com/. Then select a layer or layers which contain the drop shadow and click a button in toolbox then it will give you the css3 you need that matches the box shadow in the PSD. They have done the calculations for you.
I use it all the time for this question its great.
Right now, our mockups / live demo use images to achieve this effect (including button text). This is less than desirable for all of the standard reasons. I can get everything working except that pesky outer border. I'd really like to not add markup to my document just to have that.
I've got my test code on jsfiddle, although it doesn't work as well there as it does on my local machine: http://jsfiddle.net/Axtjm/
tldr: how to add inset border like that and keep rounded corners without extra markup.
As unintuitive as this sounds, don't use outline for outlines. Use box-shadow with a 1px spread:
box-shadow: 0px 0px 1px 1px #049ED9;
Demo: http://jsfiddle.net/Axtjm/4/
The easiest option is to add the extra container element and give each a border.
But the challenge is to do it without the border. Some ideas:
use a border and then a very thin box-shadow.
use the border style attribute AND the outline style attribute
(both dependent on the browser supporting them)
Quick JSBIN demo: http://jsbin.com/irabul
it is using border-radius property of CSS3
and simple CSS border techniques,
some of the border property,
solid Specifies a solid border
double Specifies a double border
groove Specifies a 3D grooved border. The effect depends on the border-color value
ridge Specifies a 3D ridged border. The effect depends on the border-color value
inset Specifies a 3D inset border. The effect depends on the border-color value
outset Specifies a 3D outset border. The effect depends on the border-color value
inherit Specifies that the border style should be inherited from the parent element
and here is the border-radius in detail,
http://www.css3.info/preview/rounded-border/
Use an inset box-shadow. If you're already using a box-shadow on your buttons, remember that you can stack box-shadows by using commas to separate each.
button {
border: 1px solid #369;
box-shadow: inset 0 0 1px #fff, 1px 1px 2px #000;
}
The above is just an example; replace the values with your own if necessary. If you want a bolder inset shadow, you can also stack two insets of the same value to achieve that.
Live example: http://jsfiddle.net/Axtjm/5/