console 命令行工具 X clear

console

var CreateDiv = (function(){
			var instance;

			var CreateDiv = function(html){
				if(instance){
					return instance
				}
				this.html = html;
				this.init();
				return instance = this;
			};

			CreateDiv.prototype.init = function(){
				var div = document.createElement("div")
				div.innerHTML = this.html;
				document.body.appendChild(div)
			}

			return CreateDiv
		})()

		var a = new CreateDiv("sven1");
		var b = new CreateDiv("sven2");

		console.log(a)
		console.log(a === b)

<html>
    <body>
	
</body>
</html>