CSS3 Transformation blurry borders - css

Question

I have a centered form on my page positioned using top and left values and css3 transformations.
<div class="middle">
<h1>This is blurry, or should be.</h1>
</div>
.middle {
position: absolute;
top: 50%;
left: 50%;
min-width: 390px;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
/** backface-visibility: hidden; **/
}
h1 {
padding-bottom: 5px;
border-bottom: 3px solid blue
}
Notice backface-visibility. When set to hidden, all problems are solved for me using chrome 42. It doesn't render blurry. For others however using the same chrome version, it renders blurry with it.
Here's what it looks like without BV: http://jsfiddle.net/mzws2fnp/
To you it may be blurry, to others it may not.
Here's what it looks like with BV: http://jsfiddle.net/mzws2fnp/2/
For some reason people see the border blurry however I do not. I know backface-visibility: hidden is meant to fix that, and it does for me, just not for others using the same browser as I. Strange.

Answer 1

Try -50.1%
transform: translateY(-50%) translateX(-50.1%);
EDIT:
I have found out, they are blurred when chrome dev tools are opened, try to close them and refresh

Answer 2

This is a bug in Google Chrome. I reported this issue to Google:
Rendering bug in css transform: it blurrs borders
<div class="middle">
<input type="text" />
</div>
.middle {
position: absolute;
top: 50%;
left: 50%;
-webkit-transform: translateY(-50%) translateX(-50%);
transform: translateY(-50%) translateX(-50%);
}
input {
border: 1px solid black;
border-radius: 4px;
}
var middle = document.querySelector('.middle');
setInterval(function(){
middle.style.paddingTop = middle.style.paddingTop === "0px" ? "1px" : "0px";
}, 1000);
Animated bug demonstration

Answer 3

When you use percentage, will play an odd number. will blurry borders,
using parseInt to assign the value is integer.
$(document).ready(function(){
$('.middle').css({
'top':parseInt($('.middle').position().top)+ 'px',
'left': parseInt($('.middle').position().left)+'px',
'transform':'none',
'-webkit-transform':'none'
});
});
.middle {
position: absolute;
top: 30%;
left: 50%;
min-width: 390px;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);}
h1 {
padding-bottom: 5px;
border-bottom: 4px solid blue}
.middle2 {
position: absolute;
top: 70%;
left: 50%;
min-width: 390px;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);}
h1 {
padding-bottom: 5px;
border-bottom: 4px solid blue}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="middle">
<h1>This is blurry, or should be.</h1>
</div>
<div class="middle2">
<h1>This is blurry, or should be.</h1>
</div>

Answer 4

In this specific case where you're using a solid border, you can try using a box-shadow instead of a border as a workaround. For example, replace: border-bottom: 3px solid blue; with box-shadow: 0px 3px 0px blue;

Answer 5

Use even number (2px or 4px) for the border. Odd number (3px or 5px) is giving that blur.
border-bottom: 4px solid blue;

Answer 6

there is little hack that can help to get any block as center middle.
in parent <div> where we add position: relative add below properties,
display: flex;
justify-content: center;
now add align-self: center; property with the block which we want to make center middle make sure that this block is absolute position.

Answer 7

Because translated element height is odd number. This will not occur when element height is even number.

Answer 8

This problem occurs when we add
transform: translateY(-50%) translateX(-50%);
OR
transform: translate(-50%, -50%);
it is still as an open issue in chromium bugs list.