web newbie - Javascriptåˆå¿ƒè€…ã‹ã‚‰ã¿ãŸprototypehttp://d.hatena.ne.jp/amachang/20070413/1176421425 勉強会ã®ã‚ã¨ã€ãã—ã¦ã“ã®è¨˜äº‹ã®å¾Œã€ ã‚‚ã†ä¸€åº¦è‡ªåˆ†ã®ä¸ã§prototypeã«ã¤ã„ã¦ã¾ã¨ã‚ã¦ã¿ãŸã€‚ 下ã®å®Ÿè¡Œçµæžœã‚’見ã¦ã€é¦–ã‚’ã‹ã—ã’ãŸäººã¯æ˜¯éžã¨ã‚‚èªã‚“ã§ã„ãŸã ã‘ã‚Œã°ã¨æ€ã†ã€‚ （ã£ã¦ã€é¦–ã‚’ã‹ã—ã’ã‚‹ã®ã¯åƒ•ã ã‘ã‹ï¼Ÿï¼ï¼‰ var Box = function(size){ this.size = size; }; Box.prototype = { color: "red" }; var box = new Box(10); alert(box.color); // red Box.prototype = { color: "blue" }; alert(box.color); // red var box2 = new Box(11); alert(box2.color); // blue Box.p
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