JS/lazyman.html at master · ghostwolfs/JS · GitHub

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<!DOCTYPE html>
<html>
	<head>
		<title>a lazyman</title>
	</head>
	<body>
		<script>
			function lazyMan(name){
				return new lazyman(name);
			}
			var lazyman = function(name){
				this.tasks = [];
				var self = this;
				var fn = (function(){
					return function(){
						console.log('hello '+name);
						self.next();
					}
				})(name);
				this.tasks.push(fn);
				setTimeout(function(){
					self.next();
				},0);
				// console.log(self.tasks);
			}
			lazyman.prototype.next = function(){
				var fn = this.tasks.shift();
				fn&&fn();
			};
			lazyman.prototype.eat = function(food){
				var self = this;
				var fn = (function(food){
					return function(){
						console.log('eat '+food);
						self.next();
					}
				})(food);
				this.tasks.push(fn);
				return this;
			};
			lazyman.prototype.sleep = function(time){
				var self = this;
				var fn = (function(time){
					return function(){
						setTimeout(function(){
							console.log('sleep '+time);
							self.next();
						},time*1000);
					}
				})(time);
				this.tasks.push(fn);
				return this;
			};

			lazyMan('zz').eat('lunch').sleep(3).eat('dinner');
		</script>
	</body>
</html>