I'm trying to make a odd-shaped dialogue box shaped liked one in the link below (without the wiggly tail). I've thought about doing it through polyfill, but that ended up making the element too large. I thought I could maybe do it with pseudo elements, but I didn't think I could put a shadow behind effect and have the odd-shaped top/bottom with just two pseudo elements.
The best method I could think of was to nest multiple divs inside the main one and position them with absolute and set the top manually, but I was wondering if there was an easier way of doing so.
If I want to make a div like this and write things inside without them being cut off, how should I go about doing it?
A single element with pseudo classes absolutely positioned using perspective and transforms can look like that.
div {
position: relative;
display: inline-block;
color: white;
margin: 3em;
perspective: 250px;
}
div::before, div::after {
content: '';
position: absolute;
z-index: -1;
top: -1em;
left: -1.5em;
right: -2em;
bottom: -1em;
background: black;
padding: 2em 3em .5em .5em;
transform: rotateX(180deg) rotateY(15deg) rotate(1.5deg) skewX(25deg);
}
div::before {
background: white;
top: -1.5em;
left: -2.25em;
right: -2.75em;
bottom: -1.75em;
transform: rotateX(180deg) rotateY(15deg) skewX(35deg);
}
body {
background: red;
}
<div>i know kung foo</div>
Related
I want to have some list elements that got a dynamically adjusting height via css.
For better understanding: I am inserting via ::before a number that I count via counter-increment (thats the big ones)
Problem is that nothing that I tried so far brings me even close to what i want to archive. If you change the window size everything gets shoven down...
It should look like this:
I tried:
clear: both; on every element (except the li)
height: auto; on every element
I've already read through some posts but nothing really worked for me.
Dont ask why am I trying to get it done with css... ;)
Thanks for any help!
You have an absolute positioning on your image and thumbnail wrapper which is causing huge problems, look at the adjusted CSS below:
.page-id-3606 .product_thumbnail_wrapper .product_thumbnail a img {
position: relative;
clear: both;
}
.page-id-3606 .product_thumbnail a::before {
counter-increment: section;
content: "0" counter(section) "";
font-size: 10em;
font-weight: bold;
position: relative;
/* top: 100px; */
/* left: 50%; */
line-height: 0;
height: 100px;
width: 100%;
text-align: center !important;
box-sizing: border-box !important;
text-transform: uppercase;
color: #464646;
display: block !important;
border-bottom: 3px solid #464646;
/* transform: translate(-50%, 0); */
margin: 0 !important;
z-index: 10 !important;
}
I fixed it with a little help from Rich.
the missing height and top was causing the trouble:
.page-id-3606 .product_thumbnail_wrapper::before {
content:'';
background: url('...');
height: 130% !important;
width: 100%;
position: absolute;
z-index: 1;
clear: both;
top: -65px;
}
Due to browser performance implications I can't use box-shadow CSS property because I have many similarly looking elements on my page that should have same looking style including shadow. That's the reason I would like to implement shadows using traditional PNG imagery.
Facts
My elements have predefined and more importantly fixed pixel width
They have fluid height (auto) depending on their content
They have content directly in the element and some child elements will be positioned outside their border
CSS3 can be used but performance-critical parts (gradients, shadows...) should be avoided
CSS pseudo elements can be used without limitation
Requirements
There should be no additional wrapper element added in order to have fluid shadow
Application should run smoothly on mobile browsers - shadows seem to slow down performance significantly on mobile devices since their processing power is much lower than desktop computers.
Possible direction
I thought of using :before and :after pseudos to display top-to-bottom and bottom shadows on the containing element, but these pseudos display within their parent element and positioning parent z-index higher than these children has no effect.
Visual demo of end result
This JSFiddle Demo in pure CSS3 that I would like to achieve but using PNG shadows. In reality there are numerous of these boxes so you can imagine mobile browsers are struggling with all these shadows.
Item is one such box (see blow) that needs PNG shadow. Left menu is child element positioned outside of the box.
Display in Chrome
HTML
<div class="item">
<menu>
<li>Yes</li>
<li>No</li>
<li>Maybe</li>
</menu>
<div class="content">
Some content
</div>
</div>
CSS3 LESS
.item {
position: relative;
width: 300px;
background-color: #fff;
box-shadow: 0 0 10px #ccc;
margin: 20px 20px 20px calc(20px + 3.5em);
min-height: 5em;
&:first-child {
margin-top: 0;
}
&:after {
content: "";
position: absolute;
top: 0;
left: 0;
width: 10px;
height: 5em;
background-color: #fff;
}
menu {
position: absolute;
top: 0;
left: -3.5em;
width: 3.5em;
margin: 0;
border: 0;
padding: 0;
list-style: none;
background-color: #fff;
box-shadow: 0 0 10px #ccc;
li a {
display: block;
text-align: center;
padding: 2px 0;
}
}
.content {
padding: .75em 1em;
}
}
Probably I am missing something, but looks like you want something in this way:
demo
The CSS is
.base {
width: 300px;
height: 150px;
font-size: 100px;
font-weight: bolder;
background-color: lightgreen;
position: relative;
z-index: auto;
}
.base:after {
content: '';
position: absolute;
top: 30px;
left: 30px;
background-color: green;
z-index: -1;
width: 100%;
height: 100%;
}
.child {
position: absolute;
left: 150px;
top: 50px;
border: solid 1px black;
color: red;
}
And just change the background of the :after to your image.
I have applied this solution to your fiddle.
The relevant CSS is for the before pseudo element:
.item:before {
content: "";
position: absolute;
top: -10px;
left: -10px;
right: -10px;
bottom: -10px;
z-index: -1;
background-image: url(http://placekitten.com/100/100);
background-repeat: no-repeat;
background-size: 100% 100%;
}
I have used a kitten picture, that is being scaled to cover all the needed size. Just change that to whatever you want.
I needed to do it that way because I had onky a pseudo element available.
The key for that to work (and where you probably had the difficulty) is to add z-index: auto to .item
Updated demo
Well, I had said that it wasn't posible, but I have find a way.
The standard technique would be to use 2 elements, just to avoid stretching the image (as you said). The problem is that we only have 1 pseudo element available.
The solution then would be to use 1 pseudo element, but with 2 backgrounds, to solve the issue.
CSS (only relevant part)
.item:before {
background-image: url(http://placekitten.com/320/10), url(http://placekitten.com/320/500);
background-repeat: no-repeat;
background-size: 100% 9px, 100% calc(100% - 9px);
background-position: left bottom, left top;
}
We will need an image (the first one) only 10 px in height, to cover the bottom shadow. And another one, with enough height to cover the maximumitem posible, and that will be used for the remaining part of the shadow. The dark part is that we need now a calc() height, with limited support. (anyway, better than border image)
demo 3
Need to draw angular sides of menubar as
inner content may be the some labels or links.
How about using CSS3 transform skew?
Demo
.shape {
width: 200px;
height: 50px;
-webkit-transform: skew(30deg);
-moz-transform: skew(30deg);
transform: skew(30deg);
background: #000;
margin: 20px;
}
Nothing much to explain here, it's a simple div element, which I've skewed by 30deg which will result in the shape you expected.
Note: It's a CSS3 property, so older browsers, as well as IE will spoil your things, make sure you use CSS3 Pie.
Other way to achieve this is by using :after and :before pseudo and CSS Triangles along with content property.
Demo 2 (Kept red triangles for demo purpose)
Demo 3 (Color Changed)
Demo 4 (As you commented, you need to use top: 0; for :before and :after pseudo as well, because when you add text, it will shift both the triangles from the top. So inorder to prevent that, use top: 0;)
Here, am using a simple div element and placing 2 CSS triangles which are positioned absolute to the container. This is more compatible than above, if you are going for a NON CSS3 solution, you can choose this. Make sure you use display: block; for :before as well as :after. And ofcourse you can merge the common styles but I've kept both separate, so that you can get easability to customize them separately.
.shape {
width: 200px;
height: 50px;
background: #000;
margin: 50px;
position: relative;
}
.shape:before {
display: block;
content: "";
height: 0;
width: 0;
border: 25px solid #f00;
border-bottom: 25px solid transparent;
border-left: 25px solid transparent;
position: absolute;
left: -50px;
}
.shape:after {
display: block;
content: "";
height: 0;
width: 0;
border: 25px solid #f00;
border-top: 25px solid transparent;
border-right: 25px solid transparent;
position: absolute;
right: -50px;
}
HTML
<div class="shape">
<div class="text">
text goes here
</div>
</div>
CSS
.shape {
width: 200px;
height: 30px;
-webkit-transform: skew(30deg);
-moz-transform: skew(30deg);
transform: skew(30deg);
background: #000;
margin: 20px;
color:#fff;
}
.text{
width: 150px;
height: 30px;
margin:0px auto;
-webkit-transform: skew(-30deg);
-moz-transform: skew(-30deg);
transform: skew(-30deg);
color:#fff;
}
One major gripe I have with using triangular borders is that there is no easy way to have multiple triangles with different colours, even using javascript [because JS can't access the pseudo-elements :before and :after], the alternative being that I use 3 divs, align them properly, and give all of them the same colour, etc... Too much hassle.
The best way would be using transform: skew() for newer browsers.
But you need to keep in mind that this will transform every element inside that div as well. So the text inside your menu-bar would also come up skewed. To counter that, add a reverse-skew on the inner div like this:
.menu-container {
...
transform: skewX(30deg);
...
}
.menu-inner {
...
transform: skewX(-30deg);
...
}
Have fun experimenting... :)
First time really using the pseudo :after selector. Not sure if the problem I'm running into is a limitation of it or I'm just missing something obvious.
Here's my live code.
li.current:after {
border-width: 1px 1px 0 0;
content: ' ';
background: #256f9e;
display: block;
height: 13px;
position: absolute;
width: 10px;
top: 6;
margin:0px auto;
z-index: 99;
transform: rotate(-224deg);
-webkit-transform: rotate(-224deg);
-moz-transform: rotate(-224deg);
-ms-transform: rotate(-224deg);
-o-transform: rotate(-224deg);
transform-origin: 50% 50%;
-webkit-transform-origin: 50% 50%;
-moz-transform-origin: 50% 50%;
-ms-transform-origin: 50% 50%;
-o-transform-origin: 50% 50%;
text-align: center;
float: center;
}
I've created a little triangle (Or rather a box that has been rotated to look like a triangle). I want it centered within the <li></li> but can't figure it out using my normal methods.
The things that have failed (in no particular order):
text-align: center;
float: center;
margin: 0 auto;
margin-right: 0;
margin-left: 0;
What am I missing? I doubt it matters, but I'm using AngularJS. Thought I'd mention it in case there is a known conflict between Angular & Pseudo selectors (which I doubt).
Thanks.
The issue is your use of absolute positioning & the method you're using to try and center it. If you position an element absolutely, the ol' margin: 0 auto; method won't work to center the thing. I point you to an explanation as to why this is at the end of the question, but in case you just want this to work let's get to the solution first.
Here's some working code. View it on JSFiddle
#tool-menu li {
...
position: relative;
}
li.current:after {
...
position: absolute;
width: 10px;
top: 6;
left: 50%;
margin-left: -5px;
}
Let's break down what's going on here.
Setting up a new Containing Block
In your original Fiddle, the pseudoelement is positioned absolutely relative to the viewport. An example might be the best way to show what this means, and why we don't want this. Consider setting it to top: 0. This would keep it latched to the top of the browser window (or, in this case, the JSFiddle frame), rather than the parent (the li). So, if our menu happened to be at the bottom of the page, or even moving around, the pseudoelement would be floating independent from it, stuck to the top of the page.
This is the default behavior of an absolutely positioned element when you don't explicitly set the position on any parent elements. What we want is to have its position defined relative to the parent. If we do this then the pseudoelement sticks with the parent, no matter where it happens to be.
To make this happen, you need to set the parent, #tool-menu li, to be explicitly positioned (which means setting it to be anything other than position: static). If you choose to use position: relative;, it won't change the computed location of the parent on the page, and does the thing we want. So that's why I used that one.
In technical terms, what we're doing here is creating a new containing block for the child.
Positioning the Pseudoelement
Now that our absolute positioning will be determined in relation to the parent, we can take advantage of the fact that we can use percentages to define where to place the child. In this case, you want it centered, so I set it be left: 50%.
If you do just this, though, you'll see that this lines up the left edge of the pseudoelement at 50%. This isn't what we want – we want the center of the pseudoelement to be at the middle. And that's why I added the negative margin-left. This scoots it over a bit to line the middle up with the center of the parent.
And once we do that, it's centered! Brilliance!
Why didn't my margin: auto; work?
The auto value of a margin is calculated from a fairly complex algorithm. At times, it computes to 0. I know from experience that this is one such instance of that happening, though I haven't yet traced my way through the algorithm to see exactly why. If you'd like to run through it, take a look at the spec most browsers have most likely implemented.
Using calc to center
You can also use the calc function in css to center the pseudo element.
Note: This isn't supported in IE8 and below (caniuse) but you can provide a fallback for older browsers.
View it on this code pen. I'm also using MarkP's css border method to draw the triangle.
li.current:after {
content: '';
display: block;
height: 0;
position: absolute;
width: 0;
overflow: hidden;
bottom: -5px;
left: calc(50% - 5px);
z-index: 2;
border-top: 5px #256f9e solid;
border-left: 5px transparent solid;
border-right: 5px transparent solid;
}
Wouldn't be better to just define the width as a percentage, make it a block element and text-align it in the center?
"float: center;" is invalid, and won't work. Mixing floated and absolute positioned elements are a sure way to get trouble with your layout as they don't really work that well togheter.
Try something like this:
li.current:after {
content: 'YOUR CONTENT';
display: block;
width: 100%;
text-align: center; }
Using margin:auto to center
As long as the element has a width declared you can use the absolute centering method.
To use this method the right and left properties must be set to 0 for margin: auto to be effective.
This method can be expanded to implement horizontal centering as well.
see link for full info:
http://www.smashingmagazine.com/2013/08/09/absolute-horizontal-vertical-centering-css/
li.current:after {
content: "";
position: absolute;
display: block;
right: 0;
bottom: -5px;
left: 0;
margin: auto;
border-width: 5px;
border-style: solid;
border-color: transparent;
border-top-color: #256f9e;
width: 200px;
height: 200px;
}
ul {
list-style-type: none;
padding: 0;
margin: 0;
}
<div>
<ul>
<li class="current"></li>
</ul>
</div>
Not directly related (have already voted up jmeas) but you may also find it easier to use the CSS border trick to make the triangle. e.g.
li.current:after {
content: '';
display: block;
height: 0;
position: absolute;
width: 0;
overflow:hidden;
bottom: 0;
left: 50%;
margin: 0 0 -5px -5px;
z-index: 99;
border-top: 5px #256f9e solid;
border-left: 5px transparent solid;
border-right: 5px transparent solid;
}
Similar tactics as to what jmeas has suggested with regards to the vertical positioning. We align to the bottom and then use a negative margin-bottom to push this out to the desired location.
With transform: translate() centering can be accomplished without a fixed size. This is because translate(<x>%) will use the (psuedo-)element's own size, while left and margin-left will use the container's size. By using these together we can therefore find the exact center-point.
tl;dr
To center vertically:
.container {
position: relative;
}
.container:after {
top: 50%;
transform: translateY(-50%);
}
To center horizontally:
.container {
position: relative;
}
.container:after {
left: 50%;
transform: translateX(-50%);
}
Full example
.container {
position: relative;
display: inline-block;
background: #4aa;
color: white;
padding: .5ex 1ex;
}
.container:after {
content: ":after";
position: absolute;
background: #a4a;
color: white;
padding: .5ex 1ex;
/* position below container */
top: 100%;
/* move right by 50% of containers width */
left: 50%;
/* move left by 50% of own width */
transform: translateX(-50%);
}
<p class="container">
Container with content
</p>
This may be the simplest way to do it:
.child_class::after{
position: absolute;
content: 'YourContentHere';
width: 100%;
text-align: center;
top: 50%;
}
the simplest way to do this -
With pesudo element :after or :before use display: inline-block;
Try something like this:
content: url(../images/no-result.png);
display: inline-block;
width: 100%;
text-align: center;
Using display: grid to center ::before
...worked nice for me. I'm using fa-Icons on this page and centered them within an element with 50% border-radius:
i {
font-size: 0.9rem;
border: 1px solid white;
border-radius: 50%;
width: 30px;
aspect-ratio: 1;
margin-inline: 5px;
}
i::before {
width: 100%;
height: 100%;
display: grid;
place-items: center;
}
This tutorial can help you to make center CSS pseudo-elements.
https://techidem.com/centering-pseudo-before-after-elements-content/
h2 {
text-align: center;
color: #181818;
padding-bottom: 20px;
margin-bottom: 35px;
border-bottom: 1px solid #eaeaea;
position: relative;
}
h2::after {
content: "";
width: 70px;
height: 4px;
background-color: #ff0000;
left: calc( 100% - ( 50% + 35px ) );
position: absolute;
display: block;
bottom: 0;
}
<h2>Most Recent Posts</h2>
You may use container queries with grid layout
element {
container-type: size;
&::after {
content: '';
position: absolute;
width: 100cqw;
height: 100cqh;
display: grid;
place-items: center;
}
}
Container queries: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Container_Queries
I personally don't really like the idea to change position attribute or do some margin manipulation. I think the easiest way is two lines of CSS:
.element::after {
/* your css */
line-height: initial;
vertical-align: initial;
}
And there is no need to touch the parent.
I know it is possible to create a custom "tooltip" with the :hover:after selectors and to align this tooltip relative to the original element by marking the original element as position:relative and the tooltip as absolute.
HTML:
test
<span custom-tooltip="testing a custom tooltip" class="tooltip">
test
</span>
test
CSS:
.tooltip {
position: relative;
}
.tooltip:hover:after {
content: attr(custom-tooltip);
position: absolute;
background: black;
color: white;
}
However, I must use absolute values to position or size this :after element
top: 30px;
left: -30px;
width: 300px;
What if I want to make the element as wide as it needs to be (Percentages are relative to the parent element creating a large vertical box so I can't tell it to go width: 100%)
And centered under the parent (left: -50% results in it being moved 50% of the parent to the left, not centered)
Is this possible without javascript? (If not, are there some magic selectors or functions to get the width of this or that and calc() the correct values?
You can force the tooltip onto a single line by using white-space:nowrap. I don't know of any way to center the tooltip without forcing a specific width on both the tooltip and the item the tooltip applies to. Here's a general-purpose example (without centering):
<p>Lorem <span tooltip="Lorem ipsum">ipsum</span> dolor sit amet.</p>
And the CSS:
*[tooltip] {
position: relative;
border-bottom: dotted 1px #000;
}
*[tooltip]:hover:before {
content: attr(tooltip);
background-color: #000;
color: #fff;
top: 1em;
position: absolute;
white-space: nowrap;
}
Note that I'm using :before instead of :after. If you want to center the tooltip and are able to define a fixed width, you can use this CSS instead:
*[tooltip] {
position: relative;
display: inline-block;
text-align: center;
width: 200px;
margin: 0 -75px;
}
*[tooltip]:hover:before {
content: attr(tooltip);
background-color: #000;
color: #fff;
top: 1em;
position: absolute;
white-space: nowrap;
width: 200px;
}
Here, the item is given a fixed width equal to the width of the tooltip then negative left/right margins to collapse it back down to the desired size. Note the addition of display:inline-block and text-align:center.
This technique isn't practical for inline tooltips, but works well for buttons and "call to action" links.
.tooltip
{
display: inline;
position: relative;
}
.tooltip:hover:after
{
background: #333;
background: rgba(0,0,0,.8);
border-radius: 5px;
bottom: 26px;
color: #fff;
content: attr(title);
left: 20%;
padding: 5px 15px;
position: absolute;
z-index: 98;
width: 220px;
}
code from TalkersCode complete code here Create CSS3 Tooltip