Copy TO Clipboard

index.html

<input id="txt" />
<button id="btn">Copy To Clipboard</button>

script.js

<script type="text/javascript">
	$(document).ready(function() {
		function copyText(text){
	  		function selectElementText(element) {
	    		if (document.selection) {
	      			var range = document.body.createTextRange();
	      			range.moveToElementText(element);
	      			range.select();
    			} else if (window.getSelection) {
	      			var range = document.createRange();
	      			range.selectNode(element);
	      			window.getSelection().removeAllRanges();
	      			window.getSelection().addRange(range);
	    		}
	  		}
	  		var element = document.createElement('DIV');
	  		element.textContent = text;
  			document.body.appendChild(element);
	  		selectElementText(element);
  			document.execCommand('copy');
	  		element.remove();
		}

		var txt = document.getElementById('txt');
		var btn = document.getElementById('btn');
		btn.addEventListener('click', function(){
	  	copyText(txt.value);
	})
</script>