textarea_example.html

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>jQuery custom scrollbar demo</title>
	<!-- style for demo and examples -->
	<style>
		body{margin:0; padding:0; color:#eee; background:#222; font-family:Verdana,Geneva,sans-serif; font-size:13px; line-height:20px;}
		a:link,a:visited,a:hover{color:inherit;}
		h1{font-family:Georgia,serif; font-size:18px; font-style:italic; margin:40px; color:#26beff;}
		h2{font-family:Georgia,serif; font-size:16px; font-style:italic; color:#eee;}
		p{margin:0 0 20px 0;}
		hr{height:0; border:none; border-bottom:1px solid rgba(255,255,255,0.13); border-top:1px solid rgba(0,0,0,1); margin:9px 10px; clear:both;}
		.links{margin:10px;}
		.links a{display:inline-block; padding:3px 15px; margin:7px 10px; background:#444; text-decoration:none; -webkit-border-radius:15px; -moz-border-radius:15px; border-radius:15px;}
		.links a:hover{background:#eb3755; color:#fff;}
		.content{margin:40px; width:260px; padding:20px; background:#333;}
		.content textarea{width:210px; height:140px; border:none; background:transparent; resize:none; margin:0; padding:0 0 0 10px; overflow:hidden; line-height:20px; font-family: Arial, sans-serif; font-size: 13px; margin:5px 0; outline:none; color:#ccc;}
		.content .textarea-wrapper{height:162px; overflow:hidden; border:1px solid #666; -webkit-border-radius:5px; -moz-border-radius:5px; border-radius:5px; -webkit-box-shadow:inset 0 0 40px rgba(0,0,0,0.5); -moz-box-shadow:inset 0 0 40px rgba(0,0,0,0.5); box-shadow:inset 0 0 40px rgba(0,0,0,0.5);}
		.hiddendiv{position:absolute; top:-9999px; left:-9999px; visibility:hidden; white-space: pre-wrap; width: 210px; min-height: 140px; font-family: Arial, sans-serif; font-size: 13px; padding:0 0 0 10px; word-wrap: break-word;}
		.mCSB_scrollTools{box-sizing:border-box; padding:5px 0;}
		.mCSB_scrollTools .mCSB_draggerContainer{margin:5px 0;}
	</style>
	<!-- Custom scrollbars CSS -->
	<link href="jquery.mCustomScrollbar.css" rel="stylesheet" />
</head>
<body>
	<p class="links">
		<a href="http://manos.malihu.gr">malihu</a>
		<a href="http://manos.malihu.gr/jquery-custom-content-scroller">Plugin home</a>
		<a href="complete_examples.html">Plugin demo</a>
	</p>
	<hr />
	<h1>Textarea with custom scrollbar</h1>
	<!-- content block -->
	<div class="content">
		<form>
			<textarea></textarea>
		</form>
	</div>
	<hr />
	<p>&nbsp;</p>
	<!-- Google CDN jQuery with fallback to local -->
	<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
	<script>!window.jQuery && document.write(unescape('%3Cscript src="js/minified/jquery-1.9.1.min.js"%3E%3C/script%3E'))</script>
	<!-- custom scrollbars plugin -->
	<script src="jquery.mCustomScrollbar.concat.min.js"></script>
	<script>
		(function($){
			$(window).load(function(){
				var textArea=$(".content textarea");
				textArea.wrap("<div class='textarea-wrapper' />");
				var textAreaWrapper=textArea.parent(".textarea-wrapper");
				textAreaWrapper.mCustomScrollbar({
					scrollInertia:0,
					advanced:{autoScrollOnFocus:false}
				});
				var hiddenDiv=$(document.createElement("div")),
        			content=null;
    			hiddenDiv.addClass("hiddendiv");
    			$("body").prepend(hiddenDiv);
    			textArea.bind("keyup",function(e){
        			content=$(this).val();
					var clength=content.length;
        			var cursorPosition=textArea.getCursorPosition();
					content="<span>"+content.substr(0,cursorPosition)+"</span>"+content.substr(cursorPosition,content.length);
					content=content.replace(/\n/g,"<br />");
        			hiddenDiv.html(content+"<br />");
        			$(this).css("height",hiddenDiv.height());
					textAreaWrapper.mCustomScrollbar("update");
					var hiddenDivSpan=hiddenDiv.children("span"),
						hiddenDivSpanOffset=0,
						viewLimitBottom=(parseInt(hiddenDiv.css("min-height")))-hiddenDivSpanOffset,
						viewLimitTop=hiddenDivSpanOffset,
						viewRatio=Math.round(hiddenDivSpan.height()+textAreaWrapper.find(".mCSB_container").position().top);
					if(viewRatio>viewLimitBottom || viewRatio<viewLimitTop){
						if((hiddenDivSpan.height()-hiddenDivSpanOffset)>0){
							textAreaWrapper.mCustomScrollbar("scrollTo",hiddenDivSpan.height()-hiddenDivSpanOffset);
						}else{
							textAreaWrapper.mCustomScrollbar("scrollTo","top");
						}
					}
    			});
				$.fn.getCursorPosition=function(){
        			var el=$(this).get(0),
						pos=0;
        			if("selectionStart" in el){
            			pos=el.selectionStart;
        			}else if("selection" in document){
            			el.focus();
            			var sel=document.selection.createRange(),
							selLength=document.selection.createRange().text.length;
            			sel.moveStart("character",-el.value.length);
            			pos=sel.text.length-selLength;
        			}
        			return pos;
    			}
			});
		})(jQuery);
	</script>
</body>
</html>