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Examples of making hollow triangles using CSS

Source: Internet
Author: User
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@ Kejunz <! DOCTYPE html>

The code is as follows: Copy code

<Html>
<Head>

<Meta charset = "UTF-8"/>
<Title> Untitled </title>
<Style>
Html, body {
Height: 100%;
}

Body {
Display: flex;
Justify-content: center;
Align-items: center;
Background: #333;
Font-size: 24px;
}

. Traingle {
Position: relative;
Width: 5px;
Height: 5em;
Background: # ffae62;
Border-radius: 2px;
}

. Traingle: before {
Content :"";
Position: absolute;
Width: calc (5em-5px );
Height: 5px;
Left: 2px;
Top: 0;
Background: # ffae62;
Border-radius: 2px;
Transform: rotate (30deg );
Transform-origin: 0 0;
}

. Traingle: after {
Content :"";
Position: absolute;
Width: calc (5em-5px );
Height: 5px;
Bottom: 0;
Left: 2px;
Border-radius: 2px;
Background: # ffae62;
Transform: rotate (-30deg );
Transform-origin: 0 0;
} </Style>
<Script src = "http://dabblet.com/code/prefixfree.min.js"> </script>
<Script>
If (parent === window ){
Document. addEventListener ('domainloaded', function (){
// Alert ('Hello world! ');});
}
</Script>
</Head>
<Body> <div class = "traingle"/> </body>
</Html>

@ DEMO of Ainemo in xiaoshuikeng

The code is as follows: Copy code
Body {
Background: #000;
}
# Line,
# Line: before,
# Line: after {
Position: absolute;
Width: 10px;
Height: 300px;
Background: # fff;
Border-radius: 5px;
}
# Line: before,
# Line: after {
Content :'';
}
# Line: before {
-Webkit-transform-origin: top center;
-Webkit-transform: rotate (-60deg) translate (-3px );
}
# Line: after {
-Webkit-transform-origin: bottom center;
-Webkit-transform: rotate (60deg) translate (-3px );
}
           

       


@ Kejunz and @ xiaoshuikeng's two major implementation methods are similar, all using pseudo elements through absolute positioning and rotation.


@ Nod pig's DEMO. The sister's method is a little different from the first two. She uses only one pseudo element to absolutely locate and then forms a triangle through overlapping reflection.

The code is as follows: Copy code

<! DOCTYPE html>
<Html>
<Head>
<Meta charset = "UTF-8"/>
<Meta id = "viewport" name = "viewport" content = "target-densitydpi = medium-dpi, initial-scale = 1, minimum-scale = 1, maximum-scale = 1, user-scalable = no "/>
<Meta name = "apple-mobile-web-app-capable" content = "yes"/>
<Meta name = "apple-mobile-web-app-status-bar-style" content = "black"/>
<Title> Demo </title>
<Style>
Html, body, div, span, h1, h2, h3, h4, h5, h6, p, blockquote, pre, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, footer, header, section, summary, time, mark {margin: 0; padding: 0 ;}
Ul, li {list-style: none ;}
Body {width: 320px; font-size: 16px; font-family: helvetica;-webkit-user-select: none;-webkit-text-size-adjust: none ;}
. Wrap {padding: 10px ;}
. Tri,. tri: after {width: 20px; background: #000 ;}
. Tri {position: relative; height: 100px; border-radius: 10px 10px 0 0;-webkit-box-reflect: below-9px ;}
. Tri: after {position: absolute; content: ""; height: 200px; border-radius: 10px;-webkit-transform: translate (-9px) rotate (-60deg ); -webkit-transform-origin: top center ;}
*/</Style>
</Head>
<Body>
<Div class = "wrap">
<Div class = "tri"> </div>
</Div>
</Body>
</Html>

@ A DEMO provided by yisi is also a pseudo-element, which is achieved through absolute positioning and rotation. However, with the addition of animations, we can better understand the process of making triangles. (In order to reduce the page code volume, I removed the prefixes of other browsers and only supported webkit kernel browsers .)

The code is as follows: Copy code

. Demo {cursor: pointer; width: 100px ;}
. Corner-rounded,. corner-rounded: after,. corner-rounded: before {width: 12px; height: 100px; border-radius: 999px; background-color: # FFAC5F}
. Corner-rounded {position: relative}
. Corner-rounded: after ,. corner-rounded: before {content: ""; position: absolute; top: 0; left: 0;-webkit-transition: all 1.2 s records-in-out; -webkit-transform-origin: 50% 6px}
. Corner-rounded: after {-webkit-transform: rotate (-60deg )}
. Corner-rounded: before {-webkit-transform-origin: 50%-webkit-calc (100%-6px);-webkit-transform: rotate (60deg )}
. Demo: hover. corner-rounded: after {background-color: # 88c;-webkit-transform: none}
. Demo: hover. corner-rounded: before {background-color: #66E070;-webkit-transform: none}


<Div class = "demo"> <div class = "corner-rounded"> </div>

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