heavenshell · December 14, 2015 11:28
diff --git a/sample.html b/sample.html
 <!DOCTYPE html>
 <html>
  <head>
    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
    <title>Sample</title>
    <script type="text/javascript">
      window.onload = function () {
        function Foo() {
        }
        Foo.prototype = {
          dict: {},
          data: null,
          list: [],
          setData: function (data) {
            this.data = data;
          },
          addItem: function (data) {
            this.list.push(data);
          },
          addDict: function (key, value) {
            this.dict[key] = value;
          }                 
        };

        var foo = new Foo();
        foo.addDict('key', 'value');
        foo.setData('hello');
        foo.addItem('world');

        var foo2 = new Foo();
        console.log(foo2.data);  // null
        console.log(foo2.dict);  // {} を想定したけど実際は {key: 'value'}
        console.log(foo2.list);  // [] を想定したけど実際は ['world']
      };
    </script>
  </head>
  <body></body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
	<title>Sample</title>
	<script type="text/javascript">
	window.onload = function () {
	function Foo() {
	}
	Foo.prototype = {
	dict: {},
	data: null,
	list: [],
	setData: function (data) {
	this.data = data;
	},
	addItem: function (data) {
	this.list.push(data);
	},
	addDict: function (key, value) {
	this.dict[key] = value;
	}
	};

	var foo = new Foo();
	foo.addDict('key', 'value');
	foo.setData('hello');
	foo.addItem('world');

	var foo2 = new Foo();
	console.log(foo2.data); // null
	console.log(foo2.dict); // {} を想定したけど実際は {key: 'value'}
	console.log(foo2.list); // [] を想定したけど実際は ['world']
	};
	</script>
	</head>
	<body></body>
	</html>