es6class.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>es6class</title>
</head>

<body>
    <script>
    'use strict';

    var _createClass = function() {
        function defineProperties(target, props) {
            for (var i = 0; i < props.length; i++) {
                var descriptor = props[i];
                descriptor.enumerable = descriptor.enumerable || false;
                descriptor.configurable = true;
                if ("value" in descriptor) descriptor.writable = true;
                Object.defineProperty(target, descriptor.key, descriptor);
            }
        }
        return function(Constructor, protoProps, staticProps) { 
        	if (protoProps) defineProperties(Constructor.prototype, protoProps); 
        	if (staticProps) defineProperties(Constructor, staticProps); 
        	return Constructor; 
        };
    }();

    function _classCallCheck(instance, Constructor) { 
    	if (!(instance instanceof Constructor)) { 
    			throw new TypeError("Cannot call a class as a function"); 
    		}
    	}

    var Point = function() {
        function Point(x, y) {
            var _this = this;

            _classCallCheck(this, Point);

            this.add = function() {
                return _this.x + _this.y;
            };

            this.x = x;
            this.y = y;
        }

        _createClass(Point, [{
            key: 'toString',
            value: function toString() {
                return '(' + this.x + ', ' + this.y + ')';
            }
        }]);

        return Point;
    }();
    </script>
</body>

</html>