Css Course

Yin-Yang circle created with a DIV tag and CSS properties (without image file).
Code:
<style type="text/css">
#yinyang {
 width: 100px; height: 50px;
 background: #fff;
 border-color: #000;
 border-style: solid;
 border-width: 2px 2px 50px 2px;
 border-radius: 100%;
 position: relative;
}
#yinyang:before {
 content: "";
 position: absolute;
 top: 50%;
 left: 0;
 background: #fff;
 border: 18px solid #000;
 border-radius: 100%;
 width: 14px;
 height: 14px;
}
#yinyang:after {
 content: "";
 position: absolute;
 top: 50%;
 left: 50%;
 background: #000;
 border: 18px solid #fff;
 border-radius:100%;
 width: 14px;
 height: 14px;
}
</style>

<div id="yinyang"></div>
Demo:
 

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
What attribute makes a radio button or checkbox input selected?
checked="checked" selected="selected" disabled="disabled"
<input type="checkbox" name="a_name" value="value" checked="checked" />
What CSS value scales the background image to the largest size contained within the element?
repeat-x contain linear-gradient
#id {
  background:url("path_to_image.png");
  background-size:contain;
  background-repeat:no-repeat;
}
What operator is used to determine the rest of the division of two numbers?
% * /
var rest8_7 = 8 % 7;
alert(rest8_7);
Indicate the PHP function that rounds a number up to the next highest integer.
floor() ceil() abs()
$nr = ceil(3.5);
echo $nr;        // 4
Yin-Yang with CSS

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