Make a css triangle/arrow grow when its parent div is resized - HTML CSS CSS Widget

HTML CSS examples for CSS Widget:Arrow

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Description

Make a css triangle/arrow grow when its parent div is resized

Demo Code

ResultView the demo in separate window 

<html>
 <head> 
  <meta name="viewport" content="width=device-width, initial-scale=1"> 
  <style id="compiled-css" type="text/css">

body {<!-- w  ww  .j  av  a 2s  .  c o m-->
   padding: 10px;
}

* {
   box-sizing: border-box;
}

.box {
   padding: 10px;
   width: 500px;
   position: relative;
   background: blue;
}

.box:before {
   content: '';
   display: block;
   width: 100%;
   height: 100%;
   border: 1px solid #000;
   position: absolute;
   top: 0;
   left: 0;
   box-sizing: border-box;
   border-right: solid -0px transparent;
}

.u-prop {
   position: absolute;
   height: 50%;
   width: 100%;
   top: 0;
   left: 100%;
}

.u-prop.is--bot {
   top: 50%;
}

.u-prop.is--bot .proportional {
   transform: rotate(-45deg);
   transform-origin: bottom left;
}

.u-prop.is--bot .proportional:before {
   border-bottom: 1px solid #000;
   border-top: none;
}

.u-prop .spacer {
   width: auto;
   max-height: 100%;
   visibility: hidden;
}

.u-prop .proportional {
   position: absolute;
   top: 0;
   left: 0px;
   width: 150%;
   height: 0;
   padding-bottom: 100%;
   background: #eee;
   transform: rotate(45deg);
   transform-origin: top left;
}

.u-prop .proportional:before {
   content: '';
   display: block;
   width: 100%;
   height: 100%;
   border-top: 1px solid #000;
   position: absolute;
   top: 0;
   left: 0;
   box-sizing: border-box;
}

.u-prop .wrap {
   position: absolute;
   top: 0;
   left: 0;
   height: 100%;
   width: auto;
   max-width: 100%;
   overflow: hidden;
}


      </style> 
 </head> 
 <body> 
  <div class="box">
    Lorem ipsum dolor sit amet, consectetur adipisicing elit. Porro, esse assumenda corporis nemo perspiciatis dolorem vero consectetur asperiores necessitatibus, ea, saepe fugit alias, voluptatum blanditiis quia! Consequatur dolorem, consectetur adipisci. 
   <div class="u-prop"> 
    <div class="wrap"> 
     <img class="spacer" width="2048" height="2048" src="https://www.java2s.com/style/demo/Safari.png"> 
     <div class="proportional"></div> 
    </div> 
   </div> 
   <div class="u-prop is--bot"> 
    <div class="wrap"> 
     <img class="spacer" width="2048" height="2048" src="https://www.java2s.com/style/demo/Firefox.png"> 
     <div class="proportional"></div> 
    </div> 
   </div> 
  </div>  
 </body>
</html>

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