how to remove previous results on the page which have been populated using handlebars

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On clicking on the button second time , i want to remove the previous results. How can i do that?

HTML file

HTML

<!doctype html>
<html>
	<head>
		<title>Twitter</title>
		<meta charset=utf-8/>
		<link rel="stylesheet" type="text/css" href="twitter.css">
	</head>	
	<body>
		
		<input type='textbox' value='paris' id='city'></input>
		<button id='btnCity' >Get</button>

		<ul class='container'>
			<script id="weather-template" type="text/x-handlebarstemplate">
				<li  class='weather-list'>
					<p>{{name}}</p>
					<p>Latitude : {{coord.lat}}</p>
					<p>Longitude : {{coord.lon}}</p>
					<p>Wind Degree : {{wind.deg}}</p>
					<p>Wind Speed : {{wind.speed}}</p>
				</li>
			</script>
			
		</ul>
		<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
		<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js"></script>
		<script type="text/javascript" src="handlebars-v3.0.0.js"></script>
		<script type="text/javascript" src="twitter.js"></script>
		<script>
			(function(){
				var txtCity = $('#city');
				var liWeather = $('.weather-list');

				$('#btnCity').on('click',function(){
					
					var url = 'http://api.openweathermap.org/data/2.5/weather?q='+ txtCity.val();
					var twitter = new Twitter({
						url : url,
						template : $('#weather-template').html(),
						container : $('ul.container')
					});
					twitter.fetch();

				})
			}());
		</script>
	</body>
</html>

JS file

JavaScript

//(function(){
	/*var Twitter ={
		init: function(){
			this.url = 'http://api.openweathermap.org/data/2.5/weather?q=delhi';
		}	
	}*/

	function Twitter(config ){
		//console.log(config);
		this.url = config.url,
		this.template = config.template,
		this.container = config.container 

	}

	Twitter.prototype.attachTemplate = function() {
		//console.log(this.template);
		//console.log(this.weather);

		var template = Handlebars.compile(this.template);
		var html = template(this.weather);
		this.container.append(html);
	};

	Twitter.prototype.fetch = function() {
		console.log(this.url);
		var self = this;
		$.getJSON(this.url,function(data){
			self.weather = {
				name : data.name,
				coord : {
							lat : data.coord.lat,
							lon : data.coord.lon
				},
				wind : {
							deg	:data.wind.deg,
							speed : data.wind.speed
				}
			}
			self.attachTemplate();
			// self.display();
			
		});
	};

	Twitter.prototype.display = function() {
		console.log(this.weather);
		console.log(this.weather.coord);
		console.log(this.weather.wind);
	};
	
//})();

Posted 13-Feb-15 23:03pm

gunmeets

Updated 13-Feb-15 23:04pm

v2

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