clipboard.js

Copy-to-clipboard - 20 lines of js

HTML

<input type="text" id="website" value="http://www.sitepoint.com/" />
<button class="tocopy" data-copytarget="#website">Copier</button>

CSS

label {
  clear: both;
  display: block;
  font-size: 0.85em;
  font-weight: bold;
  padding: 0.8em 0 0.2em 0;
  user-select: none;
}

input, button {
  float: left;
  font-size: 1em;
  padding: 3px 6px;
  margin: 0;
  border: 1px solid #333;
  outline: 0;
  box-shadow: none;
}

::-moz-focus-inner { 
  padding: 0;
  border: 0;
}

input {
  width: 15em;
  background-color: #fff;
  border-right: 0 none;
  border-radius: 3px 0 0 3px;
}

button {
  position: relative;
  border-radius: 0 3px 3px 0;
  cursor: pointer;
}

.copied::after {
  position: absolute;
  top: 12%;
  right: 110%;
  display: block;
  content: "copi";
  font-size: 0.75em;
  padding: 2px 3px;
  color: #fff;
  background-color: #22a;
  border-radius: 3px;
  opacity: 0;
  will-change: opacity, transform;
  animation: showcopied 1.5s ease;
}

@keyframes showcopied {
  0% {
    opacity: 0;
    transform: translateX(100%);
  }
  70% {
    opacity: 1;
    transform: translateX(0);
  }
  100% {
    opacity: 0;
  }
}

JavaScript

/*
    Copy text from any appropriate field to the clipboard
  By Craig Buckler, @craigbuckler
  use it, abuse it, do whatever you like with it!
*/
(function() {

    'use strict';
  
  // click events
  document.body.addEventListener('click', copy, true);

    // event handler
    function copy(e) {

    // find target element
    var 
      t = e.target,
      c = t.dataset.copytarget,
      inp = (c ? document.querySelector(c) : null);
      
    // is element selectable?
    if (inp && inp.select) {
      
      // select text
      inp.select();

      try {
        // copy text
        document.execCommand('copy');
        inp.blur();
        
        // copied animation
        t.classList.add('copied');
        setTimeout(function() { t.classList.remove('copied'); }, 1500);
      }
      catch (err) {
        alert('Pressez Ctrl/Cmd+C pour copier');
      }
      
    }
    
    }

})();