JasonDeving/Revealing_module_pattern

## Revealing_module_pattern
<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<script>
	window.onload = function () {
		calculator.add(2,2);
		calculator.subtract(2,2);
	}
	</script>
</head>
<body>
	<div id="Output"></div>


	<script>
		//calculator.js
		var calculator = function (eq) {
			// private members
			var eqCtl = document.getElementById(eq),
			add = function(x,y) {
				eqCtl.innerHTML = x + y;
			},
			subtract = function(x, y) {
				alert(x - y);
			}

			//public members
			return {
				add: add,
				subtract: subtract
			}
		}('Output');

	</script>
</body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<script>
	window.onload = function () {
	calculator.add(2,2);
	calculator.subtract(2,2);
	}
	</script>
	</head>
	<body>
	<div id="Output"></div>


	<script>
	//calculator.js
	var calculator = function (eq) {
	// private members
	var eqCtl = document.getElementById(eq),
	add = function(x,y) {
	eqCtl.innerHTML = x + y;
	},
	subtract = function(x, y) {
	alert(x - y);
	}

	//public members
	return {
	add: add,
	subtract: subtract
	}
	}('Output');

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