{"id":28158,"date":"2017-07-29T16:03:45","date_gmt":"2017-07-29T07:03:45","guid":{"rendered":"http:\/\/www.sejuku.net\/blog\/?p=28158"},"modified":"2024-05-06T11:44:07","modified_gmt":"2024-05-06T02:44:07","slug":"%e5%88%9d%e5%bf%83%e8%80%85%e3%81%8cjavascript%e3%81%ae%e7%b6%99%e6%89%bf%e3%82%92%e7%90%86%e8%a7%a3%e3%81%99%e3%82%8b3%e3%81%a4%e3%81%ae%e3%82%b3%e3%83%84%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/28158","title":{"rendered":"\u3010JavaScript\u5165\u9580\u3011\u521d\u5fc3\u8005\u3067\u3082\u5206\u304b\u308b\u7d99\u627f\u306e\u4f5c\u308a\u65b9\uff08ES2015\u5bfe\u5fdc\uff09"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3001\u30e9\u30a4\u30bf\u30fc\u306e\u30de\u30b5\u30c8\u3067\u3059\uff01<\/p>\n

\u4eca\u56de\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u8a00\u8a9e\u3067\u3088\u304f\u4f7f\u308f\u308c\u308b\u6982\u5ff5\u306e\u300c\u7d99\u627f\u300d<\/strong><\/span>\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<\/p>\n

\u30fb\u300c\u7d99\u627f\u300d\u3068\u306f\uff1f
\n\u30fb\u300c\u7d99\u627f\u300d\u306e\u4f7f\u3044\u65b9
\n<\/strong><\/span>
\n\u3068\u3044\u3046\u57fa\u672c\u7684\u306a\u5185\u5bb9\u304b\u3089\u3001<\/p>\n

\u30fb\u300ccall\u300d\u3092\u5229\u7528\u3057\u305f\u7d99\u627f
\n\u30fb\u300cclass\u300d\u3092\u5229\u7528\u3057\u305f\u7d99\u627f
\n\u30fb\u7d99\u627f\u3057\u305f\u6a5f\u80fd\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u65b9\u6cd5
\n<\/strong><\/span>
\n\u306a\u3069\u306e\u5fdc\u7528\u7684\u306a\u4f7f\u3044\u65b9\u306b\u95a2\u3057\u3066\u3082\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u3001\u300c\u7d99\u627f\u300d\u3092\u3057\u3063\u304b\u308a\u5b66\u7fd2\u3057\u3066\u81ea\u5206\u306e\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u3092\u76ee\u6307\u3057\u307e\u3057\u3087\u3046\uff01<\/p>\n

\u300c\u7d99\u627f\u300d\u3068\u306f\uff1f<\/h2>\n

\u305d\u308c\u3067\u306f\u3001\u307e\u305a\u6700\u521d\u306b\u300c\u7d99\u627f\u300d<\/strong><\/span>\u306b\u3064\u3044\u3066\u306e\u57fa\u672c\u7684\u306a\u77e5\u8b58\u304b\u3089\u5b66\u7fd2\u3092\u9032\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n

JavaScript\u306b\u9650\u3089\u305a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a00\u8a9e\u3067\u3042\u308c\u3070\u300c\u7d99\u627f\u300d\u3068\u3044\u3046\u6982\u5ff5\u306f\u5fc5\u305a\u51fa\u3066\u304f\u308b\u91cd\u8981\u306a\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u3059\u3002<\/p>\n

\u7c21\u5358\u306b\u8a00\u3063\u3066\u3057\u307e\u3048\u3070\u4efb\u610f\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3064\u6a5f\u80fd\u3092\u5225\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u5229\u7528\u3059\u308b<\/strong><\/span>\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u8a00\u8449\u3067\u8aac\u660e\u3059\u308b\u3088\u308a\u3082\u3001\u30b3\u30fc\u30c9\u3092\u898b\u306a\u304c\u3089\u5b66\u7fd2\u3059\u308b\u65b9\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u306e\u3067\u3001\u307e\u305a\u306f\u7c21\u5358\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n

var Human = function() {}\r\n\r\nHuman.prototype.speak = function() {\r\n    console.log('\u3053\u3093\u306b\u3061\u306f\uff01');\r\n}\r\n\r\nvar taro = new Human();\r\n\r\ntaro.speak();<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u3053\u3093\u306b\u3061\u306f\uff01<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001Human(\u4eba\u9593)\u3068\u3044\u3046\u7a7a\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u308a\u3001prototype<\/strong><\/span>\u3092\u5229\u7528\u3057\u3066\u6587\u5b57\u5217\u3092\u51fa\u529b\u3059\u308b\u3060\u3051\u306e\u300cspeak\u300d\u3068\u3044\u3046\u6a5f\u80fd<\/strong><\/span>\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u305d\u3057\u3066\u3001\u300ctaro\u300d\u3068\u3044\u3046\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<\/strong><\/span>\u3092\u4f5c\u308c\u3070\u3001taro.speak()\u3068\u8a18\u8ff0\u3059\u308b\u3060\u3051\u3067<\/strong><\/span>\u5143\u306b\u306a\u3063\u3066\u3044\u308bHuman\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3063\u3066\u3044\u308b\u300cspeak\u300d\u6a5f\u80fd<\/strong><\/span>\u304c\u4f7f\u3048\u307e\u3059\u3002\u3002<\/p>\n
\u3064\u307e\u308a\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u6587\u5b57\u5217\u3092\u51fa\u529b\u3059\u308b\u3060\u3051\u306e\u300cspeak\u300d\u3068\u3044\u3046\u6a5f\u80fd\u3092\u6301\u3063\u305f\u7c21\u5358\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3044\u3046\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u305d\u3057\u3066\u3001\u4eca\u5ea6\u306f\u300cBoy\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u3063\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n
var Human = function() {}\r\n\r\nHuman.prototype.speak = function() {\r\n    console.log('\u3053\u3093\u306b\u3061\u306f\uff01');\r\n}\r\n\r\nvar Boy = function() {}\r\n\r\nvar taro = new Boy();\r\n\r\ntaro.speak();<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
Uncaught TypeError: taro.speak is not a function<\/pre>\n
\u4eca\u5ea6\u306f\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u4f7f\u308f\u305a\u306b\u3001\u65b0\u3057\u304f\u4f5c\u6210\u3057\u305f\u300cBoy\u300d\u3092\u4f7f\u3063\u3066\u300ctaro\u300d\u3068\u3044\u3046\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u308a\u307e\u3057\u305f\u3002<\/p>\n
\u30b3\u30fc\u30c9\u3092\u898b\u308b\u3068\u5206\u304b\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u300cBoy\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u8eab\u306f\u300c\u7a7a\u3063\u307d\u300d<\/strong><\/span>\u3067\u4f55\u3082\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u305f\u3081\u3001taro.speak()\u3068\u8a18\u8ff0\u3059\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u305d\u3053\u3067\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3063\u3066\u3044\u308b\u300c\u6587\u5b57\u5217\u3092\u51fa\u529b\u3059\u308b\u6a5f\u80fd\u300d\u3092\u3001\u300cBoy\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u3082\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308c\u3070\u3044\u3044\u3067\u3059\u3088\u306d\uff1f<\/p>\n
\u3053\u306e\u3088\u3046\u306a\u6642\u306b\u300c\u7d99\u627f\u300d<\/strong><\/span>\u3092\u4f7f\u3048\u3070\u3044\u3044\u308f\u3051\u3067\u3059\uff01<\/p>\n
\u300c\u7d99\u627f\u300d\u306e\u4f7f\u3044\u65b9<\/h2>\n
\u3053\u306e\u7ae0\u3067\u306f\u3001\u57fa\u672c\u7684\u306a\u7d99\u627f\u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3092\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u4e3b\u306b\u3001Prototype\u3084Object.create\u3092\u4f7f\u3063\u305f\u624b\u6cd5\u306b\u3064\u3044\u3066\u5b66\u3093\u3067\u3044\u304d\u307e\u3059\u3002<\/p>\n
prototype\u3092\u4f7f\u3063\u305f\u7d99\u627f<\/h3>\n
\u5148\u307b\u3069\u306e\u300cBoy\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3064\u300c\u6587\u5b57\u5217\u3092\u51fa\u529b\u3059\u308b\u6a5f\u80fd\u300d\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n
var Human = function() {}\r\n\r\nHuman.prototype.speak = function() {\r\n    console.log('\u3053\u3093\u306b\u3061\u306f\uff01');\r\n}\r\n\r\nvar Boy = function() {}\r\n\r\n\/\/Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6a5f\u80fd\u3092Boy\u306b\u5f15\u304d\u7d99\u3050\r\nBoy.prototype = new Human();\r\n\r\nvar taro = new Boy();\r\n\r\ntaro.speak();<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u3053\u3093\u306b\u3061\u306f\uff01<\/pre>\n
\u3053\u306e\u4f8b\u3067\u6700\u3082\u6ce8\u76ee\u3059\u308b\u3079\u304d\u306f\u300cBoy.prototype = new Human()\u300d<\/strong><\/span>\u306e\u7b87\u6240\u3067\u3059\uff01<\/p>\n
\u3053\u306e1\u884c\u3092\u8a18\u8ff0\u3059\u308b\u3060\u3051\u3067\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3063\u3066\u3044\u305f\u300cspeak\u300d\u6a5f\u80fd\u3092Boy\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u3053\u308c\u306f\u3001Boy\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3064prototype\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3064\u6a5f\u80fd\u3092\u8ffd\u52a0\u3059\u308b\u3088\u3046\u306a\u30a4\u30e1\u30fc\u30b8<\/strong><\/span>\u306b\u8fd1\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n
\u5b9f\u884c\u7d50\u679c\u3092\u898b\u308b\u3068\u5206\u304b\u308b\u3088\u3046\u306b\u3001\u3057\u3063\u304b\u308a\u3068Boy\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304b\u3089\u300cspeak\u300d\u6a5f\u80fd\u304c\u4f7f\u3048\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n
Object.create\u3092\u4f7f\u3063\u305f\u7d99\u627f<\/h3>\n
\u3082\u30461\u3064\u3088\u304f\u4f7f\u3046\u300c\u7d99\u627f\u300d\u306e\u65b9\u6cd5\u3068\u3057\u3066\u3001\u300cObject.create\u300d<\/strong><\/span>\u304c\u3042\u308b\u306e\u3067\u3054\u7d39\u4ecb\u3057\u307e\u3059\uff01<\/p>\n
\u3053\u3061\u3089\u3082\u5148\u307b\u3069\u306e\u7d99\u627f\u65b9\u6cd5\u3068\u540c\u3058\u3088\u3046\u306b\u3001\u4efb\u610f\u306eprototype\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u6a5f\u80fd\u3092\u8ffd\u52a0\u3059\u308b<\/strong><\/span>\u3088\u3046\u306a\u30a4\u30e1\u30fc\u30b8\u3067\u7c21\u5358\u306b\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n
var Human = function() {}\r\n\r\nHuman.prototype.speak = function() {\r\n    console.log('\u3053\u3093\u306b\u3061\u306f\uff01');\r\n}\r\n\r\nvar Boy = function() {}\r\n\r\n\/\/Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6a5f\u80fd\u3092\u5f15\u304d\u7d99\u3050\r\nBoy.prototype = Object.create(Human.prototype);\r\n\r\nvar taro = new Boy();\r\n\r\ntaro.speak();<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u3053\u3093\u306b\u3061\u306f\uff01<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001\u300cObject.create\u300d<\/strong><\/span>\u306e\u5f15\u6570\u306bHuman\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306eprototype\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n
\u3053\u308c\u306b\u3088\u308a\u3001Boy\u306eprototype\u306bHuman\u304c\u6301\u3064\u6a5f\u80fd\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u308f\u3051\u3067\u3059\u3002<\/strong><\/span><\/p>\n
\u5b9f\u884c\u7d50\u679c\u304b\u3089\u3082\u5206\u304b\u308b\u3088\u3046\u306b\u300cspeak\u30e1\u30bd\u30c3\u30c9\u300d\u3092\u5229\u7528\u3067\u304d\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n
Object.create\u3067\u30e1\u30bd\u30c3\u30c9\u3092\u540c\u6642\u306b\u8ffd\u52a0\u3059\u308b\u65b9\u6cd5<\/h3>\n
\u5b9f\u306f\u300cObject.create\u300d<\/strong><\/span>\u306b\u306f\u4fbf\u5229\u306a\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\uff01<\/p>\n
\u305d\u308c\u306f\u3001\u300c\u7d99\u627f\u300d\u306b\u3088\u3063\u3066\u6a5f\u80fd\u3092\u5f15\u304d\u7d99\u3050\u3060\u3051\u3067\u306a\u304f\u30e1\u30bd\u30c3\u30c9\u3092\u540c\u6642\u306b\u8ffd\u52a0\u3067\u304d\u308b<\/strong><\/span>\u3068\u3044\u3046\u70b9\u3067\u3059\uff01<\/p>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044<\/p>\n
var Human = function() {}\r\n\r\nHuman.prototype.speak = function() {\r\n    console.log('\u3053\u3093\u306b\u3061\u306f\uff01');\r\n}\r\n\r\nvar Boy = function() {}\r\n\r\nBoy.prototype = Object.create(Human.prototype, {\r\n\r\n    \/\/\u65b0\u3057\u304fsayhello\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\r\n    sayhello: {\r\n        value: function() {\r\n            console.log('Hello!!');\r\n        }\r\n    }\r\n});\r\n\r\nvar taro = new Boy();\r\n\r\ntaro.speak();\r\ntaro.sayhello();<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u3053\u3093\u306b\u3061\u306f\uff01\r\nHello!!<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001Object.create\u306e\u7b2c2\u5f15\u6570<\/strong><\/span>\u306b\u65b0\u3057\u304f\u300csayhello\u300d\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3092\u8ffd\u52a0\u3059\u308b\u8a18\u8ff0\u3092\u8ffd\u8a18\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306b\u3088\u308a\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3063\u3066\u3044\u305f\u300cspeak\u300d\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3068\u3001\u65b0\u3057\u304f\u8ffd\u52a0\u3057\u305f\u300csayhello\u300d\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u306e\u4e21\u65b9\u304c\u5229\u7528\u53ef\u80fd\u306b\u306a\u3063\u305f\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u3053\u306e\u3088\u3046\u306b\u5358\u7d14\u306a\u7d99\u627f\u3060\u3051\u3067\u306a\u304f\u3001\u3088\u308a\u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u69cb\u9020\u3092\u5f62\u6210\u3067\u304d\u308b\u306e\u3082\u300cObject.create\u300d\u306e\u30e1\u30ea\u30c3\u30c8\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n
\u300ccall\u300d\u3092\u5229\u7528\u3057\u305f\u7d99\u627f<\/h2>\n
\u3053\u306e\u7ae0\u3067\u306f\u3001\u300ccall\u300d\u3092\u4f7f\u3063\u305f\u7d99\u627f\u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u300ccall\u300d\u3092\u5229\u7528\u3059\u308b\u30b1\u30fc\u30b9\u306b\u3064\u3044\u3066\u3068\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u624b\u6cd5\u306b\u3064\u3066\u3044\u5b66\u3093\u3067\u3044\u304d\u3044\u307e\u3059\u3002<\/p>\n
\u7d99\u627f\u3055\u308c\u306a\u3044\u521d\u671f\u5024\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u3064\u3044\u3066<\/h3>\n
\u57fa\u672c\u7684\u306a\u300c\u7d99\u627f\u300d\u3092\u5b66\u7fd2\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u4eca\u5ea6\u306f\u300ccall\u300d<\/strong><\/span>\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u300ccall\u300d\u306e\u4f7f\u3044\u65b9\u306f\u7c21\u5358\u306a\u306e\u3067\u3059\u304c\u3001\u305d\u306e\u6982\u5ff5\u304c\u5c11\u3057\u96e3\u3057\u3044\u306e\u3067\u9806\u3092\u8ffd\u3063\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u307e\u3067\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u3001\u7d99\u627f\u5143\u306b\u306a\u3063\u3066\u3044\u305f\u300cHuman\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong><\/span>\u306e\u4e2d\u8eab\u306f\u7a7a\u3063\u307d\u3067\u3057\u305f\u3002<\/p>\n
\u3057\u304b\u3057\u3001\u672c\u6765\u306f\u3055\u307e\u3056\u307e\u306a\u521d\u671f\u5024\uff08\u30d7\u30ed\u30d1\u30c6\u30a3\uff09<\/strong><\/span>\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n
\u305d\u3053\u3067\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u300c\u540d\u524d\u300d\u3092\u4fdd\u6301\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n
var Human = function(str) {\r\n\r\n    \/\/\u300cname\u300d\u306b\u540d\u524d\u3092\u4fdd\u6301\u3059\u308b\r\n    this.name = str;\r\n}\r\n\r\nHuman.prototype.speak = function() {\r\n\r\n    \/\/\u540d\u524d\u3092\u4e00\u7dd2\u306b\u51fa\u529b\u3059\u308b\r\n    console.log('\u3053\u3093\u306b\u3061\u306f\u3001'+this.name+'\u3055\u3093\uff01');\r\n}\r\n\r\n\/\/\u540d\u524d\u3092\u300c\u592a\u90ce\u300d\u306b\u3059\u308b \r\nvar taro = new Human('\u592a\u90ce');\r\n\r\ntaro.speak();<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u3053\u3093\u306b\u3061\u306f\u3001\u592a\u90ce\u3055\u3093\uff01<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u306b\u300cthis.name\u300d<\/strong><\/span>\u3068\u3044\u3046\u521d\u671f\u5024\u3092\u8a2d\u5b9a\u3057\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b\u6642\u306b\u540d\u524d\u3092\u4fdd\u6301\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u305d\u3057\u3066\u3001\u300cspeak\u300d\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u6307\u5b9a\u3057\u305f\u540d\u524d\u3068\u4e00\u7dd2\u306b\u5b9f\u884c\u7d50\u679c\u306e\u3088\u3046\u306a\u6587\u5b57\u5217\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u3088\u3046\u306aHuman\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u3001\u3053\u308c\u307e\u3067\u5b66\u7fd2\u3057\u3066\u304d\u305f\u65b9\u6cd5\u3067\u300c\u7d99\u627f\u300d<\/strong><\/span>\u3059\u308b\u3068\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n
var Human = function(str) {\r\n    this.name = str;\r\n}\r\n\r\nHuman.prototype.speak = function() {\r\n    console.log('\u3053\u3093\u306b\u3061\u306f\u3001'+this.name+'\u3055\u3093\uff01');\r\n}\r\n\r\nvar Boy = function() {}\r\n\r\nBoy.prototype = new Human();\r\n\r\nvar taro = new Boy('\u592a\u90ce');\r\n\r\ntaro.speak();<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u3053\u3093\u306b\u3061\u306f\u3001undefined\u3055\u3093\uff01<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u300cBoy\u300d\u306eprototype<\/strong><\/span>\u3092\u4f7f\u3063\u3066\u7d99\u627f\u3057\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
\u3057\u304b\u3057\u306a\u304c\u3089\u3001\u5b9f\u884c\u7d50\u679c\u3092\u898b\u308b\u3068\u5206\u304b\u308b\u3088\u3046\u306b\u300c\u540d\u524d\u300d\u304c\u300cundefined\u300d<\/strong><\/span>\u306b\u306a\u3063\u3066\u304a\u308a\u3001\u6b63\u3057\u304f\u540d\u524d\u304c\u4fdd\u6301\u3067\u304d\u3066\u3044\u306a\u3044\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
\u5b9f\u306f\u3001\u3053\u308c\u307e\u3067\u306e\u300c\u7d99\u627f\u300d\u65b9\u6cd5\u3060\u3068prototype\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6a5f\u80fd\u306f\u5f15\u304d\u7d99\u304c\u308c\u308b\u306e\u3067\u3059\u304c\u3001\u7d99\u627f\u5143\u306e\u521d\u671f\u5024\uff08\u30d7\u30ed\u30d1\u30c6\u30a3\uff09\u306f\u5f15\u304d\u7d99\u304c\u308c\u306a\u3044\u306e\u3067\u3059\uff01<\/strong><\/span><\/p>\n
\u305d\u3053\u3067\u3001\u5229\u7528\u3057\u305f\u3044\u306e\u304c\u672c\u7ae0\u3067\u5b66\u3076\u300ccall\u300d<\/strong><\/span>\u3067\u3059\u3002<\/p>\n
\u300ccall\u300d\u3092\u4f7f\u3063\u3066\u7d99\u627f\u3092\u884c\u3046\u65b9\u6cd5<\/h3>\n
\u305d\u308c\u3067\u306f\u3001\u300ccall\u300d<\/strong><\/span>\u3092\u4f7f\u3063\u305f\u7d99\u627f\u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u300ccall\u300d\u3092\u4f7f\u3046\u3068\u3001\u7d99\u627f\u5143\u306e\u521d\u671f\u5024\uff08\u30d7\u30ed\u30d1\u30c6\u30a3\uff09<\/strong><\/span>\u3092\u7c21\u5358\u306b\u547c\u3073\u51fa\u305b\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n
var Human = function(str) {\r\n    this.name = str;\r\n}\r\n\r\nHuman.prototype.speak = function() {\r\n    console.log('\u3053\u3093\u306b\u3061\u306f\u3001'+this.name+'\u3055\u3093\uff01');\r\n}\r\n\r\nvar Boy = function(name) {\r\n\r\n    \/\/Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u521d\u671f\u5024\u3092\u547c\u3073\u51fa\u3059\r\n    Human.call(this, name);\r\n}\r\n\r\nBoy.prototype = new Human();\r\n\r\nvar taro = new Boy('\u592a\u90ce');\r\n\r\ntaro.speak();<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u3053\u3093\u306b\u3061\u306f\u3001\u592a\u90ce\u3055\u3093\uff01<\/pre>\n
\u3053\u306e\u30b3\u30fc\u30c9\u4f8b\u3067\u306f\u3001\u7a7a\u3063\u307d\u3060\u3063\u305fBoy\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u306b\u3001\u300cHuman.call()\u300d\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3092\u8a18\u8ff0\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306b\u3088\u308a\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3063\u3066\u3044\u305f\u521d\u671f\u5024\u3092Boy\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u3067\u3082\u4f7f\u3048\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u300ccall\u300d\u306e\u5f15\u6570\u306b\u306f\u300cthis\u300d<\/strong><\/span>\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u3053\u308c\u306b\u3088\u308aHuman\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306ethis\u3092\u53c2\u7167\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u3055\u3089\u306b\u3001\u7b2c2\u5f15\u6570\u3068\u3057\u3066\u300cname\u300d<\/strong><\/span>\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306fHuman\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6587\u5b57\u5217\u3092\u53d7\u3051\u53d6\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b<\/strong><\/span>\u3053\u3068\u306b\u8d77\u56e0\u3057\u307e\u3059\u3002<\/p>\n
\u306a\u306e\u3067\u3001\u540c\u3058\u3088\u3046\u306bBoy\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3082\u540d\u524d\u3092\u53d7\u3051\u53d6\u308c\u308b\u3088\u3046\u306b\u5909\u6570\u300cname\u300d\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u6700\u7d42\u7684\u306b\u3001Boy\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306fHuman\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3064\u521d\u671f\u5024\u3068prototype\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3064\u6a5f\u80fd\u306e\u4e21\u65b9\u3092\u5f15\u304d\u7d99\u3044\u3060\u3053\u3068\u306b\u306a\u308b\u306e\u3067\u3059\u3002<\/p>\n
\u300cclass\u300d\u3092\u5229\u7528\u3057\u305f\u7d99\u627f<\/h2>\n
\u3053\u306e\u7ae0\u3067\u306f\u3001ES2015(ES6)\u304b\u3089\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u300cclass\u300d\u3092\u4f7f\u3063\u305f\u7d99\u627f\u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u4e3b\u306b\u3001\u300cextends\u300d\u300csuper\u300d\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u5b66\u3093\u3067\u3044\u304d\u3044\u307e\u3059\u3002<\/p>\n
\u300cextends\u300d\u3092\u5229\u7528\u3057\u3066\u7d99\u627f\u3092\u884c\u3046\u65b9\u6cd5<\/h3>\n
\u305d\u308c\u3067\u306f\u3001\u300cclass\u69cb\u6587\u300d<\/strong><\/span>\u3092\u4f7f\u3063\u3066\u7c21\u5358\u306a\u7d99\u627f\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u307e\u305a\u306f\u30e1\u30bd\u30c3\u30c9\u3060\u3051\u304c\u5b9a\u7fa9\u3055\u308c\u305fclass\u3092\u7528\u610f\u3057\u307e\u3059\u3002<\/p>\n
class Sample {\r\n  showMessage() {\r\n    console.log('Sample\u306e\u30e1\u30bd\u30c3\u30c9');\r\n  }\r\n}<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001\u300cshowMessage()\u300d<\/strong><\/span>\u3068\u3044\u3046\u6587\u5b57\u5217\u3092\u51fa\u529b\u3059\u308b\u3060\u3051\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3053\u306eSample\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3059\u308b\u306b\u306f\u300cextends\u300d<\/strong><\/span>\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n
\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n
class SampleSeconds extends Sample {}\r\n\r\nvar test = new SampleSeconds();\r\n\r\ntest.showMessage();<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
Sample\u306e\u30e1\u30bd\u30c3\u30c9<\/pre>\n
\u65b0\u3057\u304f\u300cSampleSeconds\u300d\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u304c\u3001extends\u3092\u4f7f\u3063\u3066\u300cSample\u30af\u30e9\u30b9\u300d<\/strong><\/span>\u3092\u7d99\u627f\u3057\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n
\u5b9f\u884c\u7d50\u679c\u3092\u898b\u308b\u3068\u3001\u89aa\u30af\u30e9\u30b9\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u305f\u300cshowMessage()\u300d\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u304c\u5229\u7528\u3067\u304d\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u3088\u3046\u306b\u300cextends\u300d<\/strong><\/span>\u3067\u89aa\u30af\u30e9\u30b9\u3092\u8a18\u8ff0\u3059\u308b\u3060\u3051\u306a\u306e\u3067\u3001\u975e\u5e38\u306b\u304a\u624b\u8efd\u306a\u65b9\u6cd5\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n
\u3061\u306a\u307f\u306b\u3001class\u69cb\u6587\u306b\u3064\u3044\u3066\u57fa\u672c\u304b\u3089\u5b66\u3073\u305f\u3044\u65b9\u306f\u6b21\u306e\u8a18\u4e8b\u3067\u307e\u3068\u3081\u3066\u3044\u308b\u306e\u3067\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n            \n                
\n                
\n                    
\n                    \n                    <\/div>\n                    
\n                    
\u3010JavaScript\u5165\u9580\u3011class\u69cb\u6587\u306e\u4f7f\u3044\u65b9\u30fb\u66f8\u304d\u65b9\u304c\u5206\u304b\u308b\u3088\u3046\u306b\u306a\u308b\u65b9\u6cd5\uff01<\/div>\n                    
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n
\u300csuper\u300d\u3067\u89aa\u30af\u30e9\u30b9\u3092\u5229\u7528\u3059\u308b\u65b9\u6cd5<\/h3>\n
\u300csuper\u300d<\/strong><\/span>\u3092\u4f7f\u3046\u3068\u89aa\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u3084\u30e1\u30bd\u30c3\u30c9\u3078\u7c21\u5358\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u306e\u3067\u5408\u308f\u305b\u3066\u3054\u7d39\u4ecb\u3057\u3066\u304a\u304d\u307e\u3059\uff01<\/p>\n
\u307e\u305a\u3001\u89aa\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u306b\u5b9a\u7fa9\u3057\u3066\u3044\u305f\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong><\/span>\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u304b\u3089\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u6b21\u306e\u3088\u3046\u306aclass\u304c\u3042\u308b\u3068\u3057\u307e\u3059\u3002<\/p>\n
class SampleOne {\r\n\r\n  constructor(myname, myage) {\r\n    this.name = myname;\r\n    this.age = myage;\r\n  }\r\n\r\n getName() {\r\n    return this.name;\r\n  }\r\n\r\n\r\n}<\/pre>\n
\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u3057\u3066\u300cname \/ age\u300d<\/strong><\/span>\u304c\u3001\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u300cgetName()\u300d<\/strong><\/span>\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n
\u3053\u306e\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u305f\u969b\u306b\u3001\u89aa\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc<\/strong><\/span>\u3092\u547c\u3073\u51fa\u3059\u306b\u306f\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
class SampleThirds extends SampleOne {\r\n\r\n  constructor(myname, myage) {\r\n    super(myname, myage);\r\n\r\n    console.log( this.name );\r\n    console.log( this.age );\r\n  }\r\n\r\n}\r\n\r\nvar taro = new SampleThirds('\u592a\u90ce', 30);<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u592a\u90ce\r\n30<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u5185\u306b\u300csuper(myname, myage)\u300d<\/strong><\/span>\u3068\u8a18\u8ff0\u3057\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306b\u3088\u308a\u3001\u89aa\u30af\u30e9\u30b9\u306e\u300cname \/ age\u300d\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong><\/span>\u306b\u300cmyname \/ myage\u300d\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u305d\u306e\u305f\u3081\u3001\u300cSampleThirds\u30af\u30e9\u30b9\u300d\u306f\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5b9a\u7fa9\u3092\u6539\u3081\u3066\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u306f\u306a\u3044<\/strong><\/span>\u3068\u3044\u3046\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u3055\u3089\u306b\u3001\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u3082\u7c21\u5358\u3067\u3059\u3002<\/p>\n
class SampleThirds extends SampleOne {\r\n  \r\n  getMyName() {\r\n    return '\u79c1\u306e\u540d\u524d\u306f\u3001' + super.getName() + '\u3067\u3059\uff01';\r\n  }\r\n\r\n\r\n}\r\n\r\nvar test3 = new SampleThirds('\u592a\u90ce', 30);\r\n\r\nconsole.log(test3.getMyName());<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u79c1\u306e\u540d\u524d\u306f\u3001\u592a\u90ce\u3067\u3059\uff01<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001\u300csuper.getName()\u300d<\/strong><\/span>\u3068\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u89aa\u30af\u30e9\u30b9\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u7d50\u679c\u7684\u306b\u3001\u300cgetName()\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3057\u3066\u65b0\u305f\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u6210\u3057\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u306d\u3002<\/p>\n
\u7d99\u627f\u3057\u305f\u6a5f\u80fd\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u65b9\u6cd5<\/h2>\n
\u307f\u306a\u3055\u3093\u306f\u3001\u300c\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u300d<\/strong><\/span>\u3068\u3044\u3046\u8a00\u8449\u3092\u805e\u3044\u305f\u3053\u3068\u304c\u3042\u308b\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n
\u76f4\u8a33\u3059\u308b\u3068\u300c\u4e0a\u66f8\u304d\u300d\u3068\u3044\u3046\u610f\u5473\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u3053\u3053\u3067\u89e3\u8aac\u3059\u308b\u300c\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u300d\u306f\u7d99\u627f\u306b\u3088\u3063\u3066\u5f15\u304d\u7d99\u304c\u308c\u305f\u6a5f\u80fd\u3092\u3001\u72ec\u81ea\u306b\u4e0a\u66f8\u304d\u3057\u3066\u65b0\u3057\u3044\u6a5f\u80fd\u306b\u4f5c\u308a\u5909\u3048\u308b<\/strong><\/span>\u3053\u3068\u3092\u610f\u5473\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u4f8b\u3048\u3070\u3001\u3053\u308c\u307e\u3067Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3063\u3066\u3044\u305f\u300cspeak\u300d\u30e1\u30bd\u30c3\u30c9\u306e\u6a5f\u80fd\u3092\u601d\u3044\u51fa\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
var Human = function() {}\r\n\r\nHuman.prototype.speak = function() {\r\n    console.log('\u3053\u3093\u306b\u3061\u306f\uff01');\r\n}<\/pre>\n
\u3053\u306e\u300cspeak\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u7d99\u627f\u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u308a\u3001\u305d\u306e\u5f8c\u306b\u300cspeak\u300d\u30e1\u30bd\u30c3\u30c9\u306e\u4e2d\u8eab\u3092\u72ec\u81ea\u306b\u5909\u66f4\u3057\u3066\u4e0a\u66f8\u304d\u3059\u308b\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n
var Human = function() {}\r\nHuman.prototype.speak = function() {\r\n  console.log('\u3053\u3093\u306b\u3061\u306f\uff01');\r\n}\r\n\r\nvar Boy = function() {}\r\nBoy.prototype = new Human();\r\n\r\n\/\/\u65b0\u3057\u304f\u300cspeak\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u66f8\u304d\u63db\u3048\u308b\r\nBoy.prototype.speak = function() {\r\n  console.log('\u3053\u3093\u306b\u3061\u306f\u3001Boy\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff01');\r\n}\r\n\r\nvar taro = new Boy();\r\n\r\ntaro.speak();<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u3053\u3093\u306b\u3061\u306f\u3001Boy\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff01<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001Human\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092Boy\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u7d99\u627f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u305d\u3057\u3066\u3001\u300cBoy.prototype.speak\u300d<\/strong><\/span>\u3092\u518d\u5b9a\u7fa9\u3057\u3066\u51fa\u529b\u3059\u308b\u6587\u5b57\u5217\u3092\u5909\u66f4\u3057\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u306d\u3002<\/p>\n
\u3053\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u3001\u7d99\u627f\u5143\u304c\u6301\u3063\u3066\u3044\u305f\u6a5f\u80fd\u3092\u5909\u66f4\u3057\u305f\u308a\u8ffd\u8a18\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd<\/strong><\/span>\u306b\u306a\u308b\u3068\u3044\u3046\u70b9\u306f\u91cd\u8981\u306a\u8981\u7d20\u3068\u306a\u308b\u306e\u3067\u3001\u305c\u3072\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u307e\u3068\u3081<\/h2>\n
\u4eca\u56de\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u300c\u7d99\u627f\u300d<\/strong><\/span>\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3057\u3066\u304d\u307e\u3057\u305f\uff01<\/p>\n
\u6700\u5f8c\u306b\u3001\u3082\u30461\u5ea6\u30dd\u30a4\u30f3\u30c8\u3092\u632f\u308a\u8fd4\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u30fb\u300c\u7d99\u627f\u300d\u3068\u306f\u3001\u5225\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3064\u6a5f\u80fd\u306a\u3069\u3092\u5f15\u304d\u7d99\u3044\u3067\u5229\u7528\u3059\u308b\u3053\u3068
\n\u30fbcall\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u7d99\u627f\u5143\u304c\u6301\u3063\u3066\u3044\u305f\u521d\u671f\u5024\u306a\u3069\u3092\u5f15\u304d\u7d99\u3050\u3053\u3068\u304c\u3067\u304d\u308b
\n\u30fbclass\u69cb\u6587\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u7c21\u5358\u306b\u7d99\u627f\u304c\u5b9f\u73fe\u3067\u304d\u308b
\n\u30fb\u7d99\u627f\u5143\u306e\u30e1\u30bd\u30c3\u30c9\u306a\u3069\u306f\u3001\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\uff08\u4e0a\u66f8\u304d\uff09\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b
\n<\/strong>
\n\u3053\u308c\u3089\u306e\u5185\u5bb9\u3092\u8e0f\u307e\u3048\u306a\u304c\u3089\u3001\u305c\u3072\u81ea\u5206\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u3082\u7a4d\u6975\u7684\u306b\u53d6\u308a\u5165\u308c\u3066\u6d3b\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u9811\u5f35\u308a\u307e\u3057\u3087\u3046\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u3053\u3093\u306b\u3061\u306f\u3001\u30e9\u30a4\u30bf\u30fc\u306e\u30de\u30b5\u30c8\u3067\u3059\uff01 \u4eca\u56de\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u8a00\u8a9e\u3067\u3088\u304f\u4f7f\u308f\u308c\u308b\u6982\u5ff5\u306e\u300c\u7d99\u627f\u300d\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01 \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001 \u30fb\u300c\u7d99\u627f\u300d\u3068\u306f\uff1f \u30fb\u300c\u7d99\u627f\u300d\u306e\u4f7f\u3044\u65b9 \u3068\u3044\u3046\u57fa\u672c\u7684\u306a\u5185\u5bb9\u304b\u3089\u3001 \u30fb\u300ccall\u300d 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