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<!DOCTYPE html>
<title>Box Shadow Border Radius (Outset)</title>
<link rel="author" title="Elika J. Etemad" href="http://fantasai.inkedblade.net/contact">
<link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#shadow-shape">
<link rel="match" href="box-shadow-radius-000-ref.html">
<!-- Allow differences of antialised pixels along rounded edges -->
<meta name="fuzzy" content="0-25;0-80">
<style>
body > div {
/* Isolate tests from each other */
position: relative;
width: 100px;
height: 100px;
float: left;
}
div > div {
position: absolute;
box-sizing: border-box;
/* opacity: 0.7; /* uncomment this line for debugging */
}
.floor > .test {
color: silver;
}
.trap > .test {
color: red;
}
.floor > .ref {
border: solid red;
width: 58px;
height: 58px;
top: 21px;
left: 21px;
}
.trap > .ref {
border: solid silver;
width: 62px;
height: 62px;
top: 19px;
left: 19px;
}
/* Keep tests centered by (top|left)*2 + (width|height) = 100.
Keep tests consistent spread + (width|height) = 60
Floor = spread - 2px
Trap = spread + 2px */
.once > .test {
border-radius: 10px;
box-shadow: 0 0 0 10px;
/* shadow radius = 20px */
top: 30px; left: 30px;
width: 40px; height: 40px;
}
.once > .ref {
border-radius: 20px;
}
.once.floor > .ref {
border-width: 8px;
}
.once.trap > .ref {
border-width: 12px;
}
.twice > .test {
border-radius: 10px;
box-shadow: 0 0 0 5px;
/* shadow radius = 15px */
top: 25px; left: 25px;
width: 50px; height: 50px;
}
.twice > .ref {
border-radius: 15px;
}
.twice.floor > .ref {
border-width: 3px;
}
.twice.trap > .ref {
border-width: 7px;
}
.half > .test {
border-radius: 8px;
box-shadow: 0 0 0 16px;
/* shadow radius = 21px */
top: 36px; left: 36px;
width: 28px; height: 28px;
}
.half > .ref {
border-radius: 21px;
}
.half.floor > .ref {
border-width: 14px;
}
.half.trap > .ref {
border-width: 20px;
}
.fourth > .test {
border-radius: 5px;
box-shadow: 0 0 0 20px;
/* shadow radius = 14.45px */
top: 40px; left: 40px;
width: 20px; height: 20px;
}
.fourth > .ref {
border-radius: 15px;
}
.fourth.floor > .ref {
border-width: 18px;
}
.fourth.trap > .ref {
border-width: 23px;
}
.eighth > .test {
border-radius: 2px;
box-shadow: 0 0 0 16px;
/* shadow radius = 5.28 */
top: 36px; left: 36px;
width: 28px; height: 28px;
}
.eighth > .ref {
border-radius: 5.28px;
}
.eighth.floor > .ref {
border-width: 14px;
}
.eighth.trap > .ref {
border-width: 18px;
}
</style>
<p>Test passes if there is no red.
<div class="once floor">
<div class="ref"></div>
<div class="test"></div>
</div>
<div class="once trap">
<div class="test"></div>
<div class="ref"></div>
</div>
<div class="twice floor">
<div class="ref"></div>
<div class="test"></div>
</div>
<div class="twice trap">
<div class="test"></div>
<div class="ref"></div>
</div>
<div class="half floor">
<div class="ref"></div>
<div class="test"></div>
</div>
<div class="half trap">
<div class="test"></div>
<div class="ref"></div>
</div>
<div class="fourth floor">
<div class="ref"></div>
<div class="test"></div>
</div>
<div class="fourth trap">
<div class="test"></div>
<div class="ref"></div>
</div>
<div class="eighth floor">
<div class="ref"></div>
<div class="test"></div>
</div>
<div class="eighth trap">
<div class="test"></div>
<div class="ref"></div>
</div>
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