I have an <li> which is constrained in width and the height is set to an aspect ratio of 1:1.
I then have an element inside which is positioned absolutely with a 100% width and height. I then add an icon font to the :before pseudo element. How can I vertically center that pseudo element?
My code is:
li
+span-columns(1, 6)
a
+border-radius(50%)
display: block
position: relative
width: 100%
border: 5px solid $bright-blue
border: remCalc(5px) solid $bright-blue
&:before
padding-top: 100%
content: ''
display: block
span
display: block
position: absolute
top: 0
left: 0
width: 100%
height: 100%
&:before
// Content is added via the style for data-icon
display: inline-block
min-height: 100%
vertical-align: middle
width: 100%
color: $white
font-size: 32px
text-align: center
outline: 1px solid red
A pic of the problem. The red outline is on the span:before
COMPILED OUTPUT:
li {
width: 150px;
}
li a {
border-radius: 50%;
display: block;
position: relative;
width: 100%;
border: 5px solid blue;
}
li a:before {
padding-top: 100%;
content: '';
display: block;
}
li a span {
display: block;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
li a span:before {
content: attr(data-icon);
font-family: 'IconFont';
display: inline-block;
min-height: 100%;
vertical-align: middle;
width: 100%;
color: white;
font-size: 32px;
text-align: center;
outline: 1px solid red;
}
I'v created a fiddle with a solution for you.
Here: http://jsfiddle.net/avrahamcool/h3e2G/
your span is called Content in my fiddle, and I've add a new span called Centerer.
also, I centered some text in the layout, but you can change it back to your logo without noticing any differnce.
the main ideads are:
fix the height of the li (you already fixed the width, and if it should be a circle, I dont see a problem with also fixing the height).
lossing the relative and ablsolute way
instead of centering the text inside the span (while the span was height:100%), we center the span inside his holder.
Had to solve this with top padding like so:
$half-width: space(1, 6) / 2
$half-font: remCalc(33px) / 2
$border-widths: remCalc(5px)
+rem(padding-top, $half-width - $half-font - $border-widths)
That gives me custom top padding in rems depending on the width of the circle at the time and it scales perfectly when the body font size is increased or decreased.
Related
I want to create a side navigation, which should be full height of the browser window. Each menu item (DT) has additional element (DD) where I will put some filters later on. When I click a menu item, its additional element opens, and pushes all other closed items to bottom of the menu. The problem is that once it's opened the size of the parent DL exceeds the screen instead of staying full height.
Could you please suggest a solution to resolve the issue.
HTML
<dl>
<dt>Item</dt>
<dd class="active">Filters</dd>
<dt>Item</dt>
<dd>Filters</dd>
</dl>
CSS
body, html{
height: 100%;
padding: 0;
margin: 0;
}
dl{
display: block;
margin: 0;
width: 200px;
background: grey;
height: 100% !important;
}
dt{
background: #ccc;
padding: 5px 10px;
}
dd{
display: none;
margin: 10px;
}
dd.active{
display: block;
height: 100%;
}
JSFIDDLE
Please do remove dd.active { height: 100% } and check it...
Think this will help you.
The !important declaration is unnecessary. If you know the number of menu items (e.g. 2) and their height (e.g. 40px), maybe this could help:
dd.active {
height: calc(100% - 80px);
}
An alternative (and equally inelegant) solution would be to use tables. Setting the table height to 100% will automatically stretch the rows with unspecified height to fill the remaining space (so only the rows that correspond to the menu items should have their height specified).
My solution:
<dl>
<dt>Item</dt>
<dd class="active">Filters</dd>
<dt>Item</dt>
<dd>Filters</dd>
</dl>
body, html{
height: 100%;
padding: 0;
margin: 0;
}
dl{
display: table; /*changed*/
margin: 0;
width: 200px;
background: grey;
height: 100% !important;
}
dt{
background: #ccc;
padding: 5px 10px;
}
dd{
display: none;
margin: 10px;
}
dd.active{
display: table-row; /*changed*/
height: 100%;
}
UPDATED JSFIDDLE
I'm trying to indicate the active link, using a triangle-shaped CSS "cut-out" (the triangle is cut out of the white header.
http://codepen.io/Goatsy/pen/xVvRmZ
/*
.container {
width: 1200px;
}
*/
How do I "cut out" the red triangle from both the contained header and full-width background (red) block? I need to cut out the triangle to expose underlying photo.
The header works great, but as soon as the full-width red block is applied to the background layer of contained header, it "fills in" the triangle cut-out.
UPDATE:
I created a flexbox within a flexbox. Unfortunately, the contained header is not exactly 1200px, and this will be difficult to apply to the overall layout.
http://codepen.io/Goatsy/pen/xVvRmZ
.wrapper-whole {
display: flex;
flex-direction: row;
height: 134px;
margin: auto;
}
.flexy {
background: #f00;
flex: 2;
height: 134px;
}
.wrapper { /* wraps contained header navbar */
display: flex;
flex-direction: row;
height: 134px;
border-left: 15px solid #fff;
border-right: 15px solid #fff;
max-width: 1200px;
margin: auto;
flex: 6;
}
Instead of cutting it out from a background, you could create the illusion of a background by making red elements on each side of the white header using :before and :after pseudo-elements.
In http://codepen.io/anon/pen/MyNpdX, I added the following CSS:
.wrapper {
/* the stuff that was already here */
position: relative;
}
.wrapper:after, .wrapper:before{
content: "";
background-color: #f00;
width: 4000px;
position: absolute;
height: 134px;
top: 0;
}
.wrapper:before{
margin-right: 15px;
right: 100%;
}
.wrapper:after{
left: 100%;
margin-left: 15px;
}
Too many questions:
let me try to answer the ones I've understood.
I'll keep editing this answer as I go:
to contain something: you can have the following parent div
.parent {
max-width: 1200px;
overflow: hidden;
}
this way a child red div, would not appear outside parents constraint.
you can achieve css-triangles as:
.arrow-up {
width: 0;
height: 0;
border-left: 15px solid transparent;
border-right: 15px solid transparent;
border-bottom: 15px solid black;
}
<div class="arrow-up"></div>
p.s.: you're codepen is so far behind the layout in question, that it's hard to hands-on fix the problem
Place the contained flexbox header, inside of another flexbox.
Place one (red) block on left of header and one (red) block on right.
Create max-width for white header:
#media screen and (min-width: 480px) {
.wrapper { /* wraps contained header navbar */
min-width: 1200px;
}
}
http://codepen.io/Goatsy/pen/xVvdKN
Here is a fiddle.
<p>foo <a class="infolink" href="#">bar</a> baz</p>
and
a.infolink::before
{
content: '?';
background: blue;
color: white;
width: 20ex;
height: 20ex;
}
The '?' appears but clearly does not have 20ex size. Why not? Tested in Firefox and Chrome.
Note: The ::before and ::after pseudo-elements are actually laid display: inline; by default.
Change the display value to inline-block for the width & height to take effect while maintaining inline formatting context.
a.infolink::before {
content: '?';
display: inline-block;
background: blue;
color: white;
width: 20px;
height: 20px;
}
http://jsfiddle.net/C7rSa/3/
::before and ::after pseudo-elements are laid inline by default, so width and height won't take effect.
Set it to display: inline-block and it should work.
Use this if you have image in container or CSS white-space: nowrap; property
body::before{
content:url(https://i.imgur.com/LJvMTyw.png);
transform: scale(.3);
}
For me it worked when I used display: block.
If you set the element to position: relative and the pseudo to position: absolute, you can adjust the pseudo width and height in relation to the parent element size.
div {
position: relative;
width:400px;
height:200px;
padding: 0;
}
div::before {
position: absolute;
width:100%;
height: 100%
}
add display:block;
demo
p > a.infolink::before {
display:block;
content:'?';
background: blue;
color: white;
width: 20ex;
height: 20ex;
border:1px solid #000;
}
I can get it to work but not using a percentage in width. Pixels work fine
visibility: visible;
content: "stuff";
min-width: 29px;
width: 100%;
float: left;
position: relative;
top: -15px;
left: 0;
Here's what I'm trying to achieve:
Here's a fiddle showing the styling I have, (making use of display: table as I don't want to fix the width of each item and it should be responsive).
I'm close, here's the styling (SASS for brevity) and how it looks:
.nav--main {
ul {
display: table;
table-layout: fixed;
width: 100%;
border-collapse: collapse;
li {
display: table-cell;
border: 1px solid #333;
text-align: center;
line-height: 1.2;
vertical-align: top;
overflow: hidden;
}
}
a {
display: inline-block;
vertical-align: middle;
width: 100%;
height: 200%;
padding: .5em;
background-color: rgba(105,158,197,1);
color: #fff;
text-decoration: none;
}
}
But I cannot get the a to take up the full height and remain vertically-centered in the middle. This fiddle shows one kinda hacky attempt, but only by setting vertical-align to top.
I don't want to:
set a fixed height
place the background-color on the li rather than the a: I hate when the clickable area doesn't take advantage of all available space
I don't know, in which case this might break, but a somewhat dirty trick could be this:
Updated CSS parts only
ul {
overflow: hidden;
}
a {
margin: -5em 0;
padding: 5.5em 0;
}
Demo
Try before buy
add this:
background: rgba(105,158,197,1);
into ul
That set the background color into the same as your link.
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