CSS turing完成了吗？ [英] Is CSS turing complete?
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问题描述
CSS不是，就我所知，图灵完成了。但我的CSS的知识是非常有限的。
CSS isn't, insofar as I know, Turing complete. But my knowledge of CSS is very limited.
- CSS Turing是否完成？
- 任何现有草稿或委员会考虑的语言特性
推荐答案
您可以将 CSS3中的规则110 ，因此只要您考虑了适当的附加HTML文件和用户交互强>成为CSS的执行的一部分。 很好的实现可用，此处包含另一个实现（ JsFiddle version ）：
You can encode Rule 110 in CSS3, so it's Turing-complete so long as you consider an appropriate accompanying HTML file and user interactions to be part of the "execution" of CSS. A pretty good implementation is available, and another implementation is included here (JsFiddle version):
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Rule 110</title>
<style type="text/css" media="screen">
body {
-webkit-animation: bugfix infinite 1s;
font-family: "Courier New";
font-size: 28px;
}
@-webkit-keyframes bugfix { from { padding: 0; } to { padding: 0; } }
/* 111 110 101 100 011 010 001 000
0 1 1 0 1 1 1 0 */
body > input {
-webkit-appearance: none;
display: block;
float: left;
border-right: 1px solid #ddd;
border-bottom: 1px solid #ddd;
padding: 5px 12px;
margin: 0;
}
body > input::before {
content: "0";
}
body > input:nth-of-type(-n+30) { border-top: 1px solid #ddd; }
body > input:nth-of-type(30n+1) { border-left: 1px solid #ddd; clear: left; }
body > input::before { content: "0"; }
body > input:checked::before { content: "1"; }
body > input:checked { background: #afa !important; }
input:not(:checked) +
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+
input::before {
content: "1";
}
input:not(:checked) +
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+
input {
background: #fa0;
}
input:checked +
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+
input::before {
content: "1";
}
input:checked +
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+
input {
background: #fa0;
}
input:checked +
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+
input::before {
content: "1";
}
input:checked +
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+
input {
background: #fa0;
}
input:checked + input:checked + input:checked +
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+
input::before {
content: "0";
}
input:checked + input:checked + input:checked +
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+
input {
background: #fff;
}
input:not(:checked) + input:not(:checked) + input:not(:checked) +
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+
input::before {
content: "0";
}
input:not(:checked) + input:not(:checked) + input:not(:checked) +
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+
input {
background: #fff;
}
body > input:nth-child(30n) { display: none !important; }
body > input:nth-child(30n) + label { display: none !important; }
</style>
</head>
<body>
<input type="checkbox" />
<input type="checkbox" />
/* A total of 900 checkboxes required */
<input type="checkbox" />
<input type="checkbox" />
</body>
</html>
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