{"json_modified": "2016-10-21T07:33:00.276662", "uuid": "cac2d758-2942-46c3-9583-8fcda7a96a05", "title": "Meta programming", "url": "/en-US/docs/Web/JavaScript/Guide/Meta_programming", "tags": ["Guide", "Proxy", "Reflect", "JavaScript"], "translations": [{"uuid": "3cfc7b74-a62c-42fe-9ca6-cd65e4649d4a", "title": "Meta programming", "url": "/es/docs/Web/JavaScript/Guide/Meta_programming", "tags": ["Reflejar", "Proxy", "Gu\u00eda", "JavaScript"], "summary": "Comenzando con ECMAScript 6, JavaScript gana soporte para el <a href=\"/es/docs/Web/JavaScript/Referencia/Proxy\" title=\"La documentaci&#xF3;n acerca de este tema no ha sido escrita todav&#xED;a . &#xA1;Por favor  considera contribuir !\"><code>Proxy</code></a> y objetos <a href=\"/es/docs/Web/JavaScript/Referencia/Reflect\" title=\"La documentaci&#xF3;n acerca de este tema no ha sido escrita todav&#xED;a . &#xA1;Por favor  considera contribuir !\"><code>Reflect</code></a> permitiendote interceptar y definir comportamiento customizado\u00a0para operaciones fundamentales del lenguaje\u00a0(por ejemplo, observaci\u00f3n de propiedad, asignaci\u00f3n, enumeraci\u00f3n, invocaci\u00f3n de funciones, etc). Con la ayuda de estos dos objetos, eres capaz de programar en el nivel meta de javascript.", "localization_tags": ["inprogress"], "locale": "es", "last_edit": "2016-07-15T11:40:59", "review_tags": []}, {"uuid": "33227540-9286-44a9-850f-82a141df4737", "title": "M\u00e9taprogrammation", "url": "/fr/docs/Web/JavaScript/Guide/M%C3%A9taprogrammation", "tags": ["Guide", "Proxy", "Reflect", "JavaScript"], "summary": "\u00c0 partir d'ECMAScript 6, JavaScript fournit les objets natifs <a href=\"/fr/docs/Web/JavaScript/Reference/Objets_globaux/Proxy\" title=\"L'objet Proxy est utilis&#xE9; afin de d&#xE9;finir un comportement sur mesure pour certaines op&#xE9;rations fondamentales (par exemple, l'acc&#xE8;s aux propri&#xE9;t&#xE9;s, les affectations, les &#xE9;num&#xE9;rations, les appels de fonctions, etc.).\"><code>Proxy</code></a> et <a href=\"/fr/docs/Web/JavaScript/Reference/Objets_globaux/Reflect\" title=\"Reflect est un objet natif qui fournit des m&#xE9;thodes pour les op&#xE9;rations qui peuvent &#xEA;tre intercept&#xE9;es en JavaScript (via les proxies). Les m&#xE9;thodes de cet objet sont les m&#xEA;mes que celles des gestionnaires de proxy. Reflect n'est pas une fonction (y compris pour construire un objet).\"><code>Reflect</code></a>. Ces objets permettent d'intercepter et de d\u00e9finir des comportements sp\u00e9cifiques pour certaines op\u00e9rations fondamentales du langage (par exemple la recherche d'une propri\u00e9t\u00e9, l'affectation, l'\u00e9num\u00e9ration, l'appel d'une fonction, etc.). Gr\u00e2ce \u00e0 ces deux objets, il est possible d'interagir avec le langage lui-m\u00eame (on parle alors de m\u00e9taprogrammation).", "localization_tags": [], "locale": "fr", "last_edit": "2015-10-11T00:05:16", "review_tags": []}, {"uuid": "34a579e3-9c04-4223-84c3-8d994f178cfc", "title": "\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0", "url": "/ja/docs/Web/JavaScript/Guide/Meta_programming", "tags": ["Guide", "Proxy", "Reflect", "JavaScript"], "summary": "ECMAScript 6 \u304b\u3089\u3001JavaScript \u306b\u306f <a href=\"/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy\" title=\"&#x30D7;&#x30ED;&#x30AD;&#x30B7;&#x3068;&#x306F;&#x3001;&#x958B;&#x767A;&#x8005;&#x81EA;&#x8EAB;&#x304C; JavaScript &#x3067;&#x52D5;&#x4F5C;&#x3092;&#x5B9A;&#x7FA9;&#x3059;&#x308B;&#x30AA;&#x30D6;&#x30B8;&#x30A7;&#x30AF;&#x30C8;&#x3067;&#x3059;&#x3002;&#x30AA;&#x30D6;&#x30B8;&#x30A7;&#x30AF;&#x30C8;&#x306E;&#x65E2;&#x5B9A;&#x52D5;&#x4F5C;&#x306F; JavaScript &#x30A8;&#x30F3;&#x30B8;&#x30F3;&#x306B;&#x5B9F;&#x88C5;&#x3055;&#x308C;&#x3066;&#x304A;&#x308A;&#x3001;&#x305F;&#x3044;&#x3066;&#x3044;&#x306F; C++ &#x306A;&#x3069;&#x306E;&#x4F4E;&#x30EC;&#x30D9;&#x30EB;&#x8A00;&#x8A9E;&#x3067;&#x8A18;&#x8FF0;&#x3055;&#x308C;&#x3066;&#x3044;&#x307E;&#x3059;&#x3002;&#x30D7;&#x30ED;&#x30AD;&#x30B7;&#x306F;&#x3001;&#x30AA;&#x30D6;&#x30B8;&#x30A7;&#x30AF;&#x30C8;&#x306E;&#x6319;&#x52D5;&#x306E;&#x307B;&#x3068;&#x3093;&#x3069;&#x3092; JavaScript &#x3067;&#x5B9A;&#x7FA9;&#x3067;&#x304D;&#x308B;&#x3088;&#x3046;&#x306B;&#x3057;&#x307E;&#x3059;&#x3002;&#x3053;&#x308C;&#x306F; &#x30E1;&#x30BF;&#x30D7;&#x30ED;&#x30B0;&#x30E9;&#x30DF;&#x30F3;&#x30B0; API &#x3092;&#x63D0;&#x4F9B;&#x3059;&#x308B;&#x3082;&#x306E;&#x3068;&#x8A00;&#x308F;&#x308C;&#x3066;&#x3044;&#x307E;&#x3059;&#x3002;\"><code>Proxy</code></a> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068 <a href=\"/ja/docs/Web/JavaScript/Reference/Global_Objects/Reflect\" title=\"Reflect&#x306F;JavaScript&#x306E;&#x64CD;&#x4F5C;&#x306E;&#x30A4;&#x30F3;&#x30BF;&#x30FC;&#x30BB;&#x30D7;&#x30C8;&#x306B;&#x5BFE;&#x3059;&#x308B;&#x30E1;&#x30BD;&#x30C3;&#x30C9;&#x3092;&#x63D0;&#x4F9B;&#x3059;&#x308B;&#x30D3;&#x30EB;&#x30C8;&#x30A4;&#x30F3;&#x30AA;&#x30D6;&#x30B8;&#x30A7;&#x30AF;&#x30C8;&#x3067;&#x3059;&#x3002;&#x30E1;&#x30BD;&#x30C3;&#x30C9;&#x306F;proxy handlers&#x306E;&#x30E1;&#x30BD;&#x30C3;&#x30C9;&#x3068;&#x540C;&#x3058;&#x3067;&#x3059;&#x3002;Reflect&#x306F;&#x95A2;&#x6570;&#x30AA;&#x30D6;&#x30B8;&#x30A7;&#x30AF;&#x30C8;&#x3067;&#x306F;&#x3042;&#x308A;&#x307E;&#x305B;&#x3093;&#x3002;\"><code>Reflect</code></a> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306f\u57fa\u672c\u7684\u306a\u8a00\u8a9e\u64cd\u4f5c\uff08\u4f8b\u3048\u3070\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u691c\u7d22\u3001\u4ee3\u5165\u3001\u5217\u6319\u3001\u95a2\u6570\u547c\u3073\u51fa\u3057\u306a\u3069\uff09\u306b\u5272\u308a\u8fbc\u307f\u3001\u52d5\u4f5c\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3067\u304d\u307e\u3059\u3002\u3053\u306e 2 \u3064\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u304a\u304b\u3052\u3067\u3001JavaScript \u3067\u30e1\u30bf\u30ec\u30d9\u30eb\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u884c\u3048\u307e\u3059\u3002", "localization_tags": [], "locale": "ja", "last_edit": "2015-10-10T16:35:56", "review_tags": ["technical", "editorial"]}, {"uuid": "65e75871-99fb-4fad-95bc-7077ddb10d96", "title": "\uba54\ud0c0 \ud504\ub85c\uadf8\ub798\ubc0d", "url": "/ko/docs/Web/JavaScript/Guide/%EB%A9%94%ED%83%80_%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%B0%8D", "tags": [], "summary": "Starting with ECMAScript 6, JavaScript gains support for the <a href=\"/ko/docs/Web/JavaScript/Reference/Proxy\" title=\"The documentation about this has not yet been written; please consider contributing!\"><code>Proxy</code></a> and <a href=\"/ko/docs/Web/JavaScript/Reference/Reflect\" title=\"The documentation about this has not yet been written; please consider contributing!\"><code>Reflect</code></a> objects allowing you to intercept and define custom behavior for fundamental language operations (e.g. property lookup, assignment, enumeration, function invocation, etc). With the help of these two objects you are able to program at the meta level of JavaScript.", "localization_tags": ["inprogress"], "locale": "ko", "last_edit": "2015-11-24T01:31:41", "review_tags": []}, {"uuid": "506f4630-3b06-4478-9227-5cd506a29840", "title": "Meta programming", "url": "/pt-BR/docs/Web/JavaScript/Guide/Meta_programming", "tags": [], "summary": "Come\u00e7ando com ECMAScript 6, JavaScript ganha apoio para o\u00a0<a href=\"/pt-BR/docs/Web/JavaScript/Reference/Proxy\" title=\"The documentation about this has not yet been written; please consider contributing!\"><code>Proxy</code></a> e <a href=\"/pt-BR/docs/Web/JavaScript/Reference/Reflect\" title=\"The documentation about this has not yet been written; please consider contributing!\"><code>Reflect</code></a> objetos, permitindo que voc\u00ea para interceptar e definir o comportamento personalizado para opera\u00e7\u00f5es de linguagem fundamentais (por exemplo, pesquisa de propriedade, cess\u00e3o, enumera\u00e7\u00e3o, a fun\u00e7\u00e3o de chamada, etc). Com a ajuda destes dois objetos que s\u00e3o capazes de programar a n\u00edvel meta de JavaScript.", "localization_tags": ["inprogress"], "locale": "pt-BR", "last_edit": "2015-10-14T18:23:14", "review_tags": []}, {"uuid": "3b4424bd-5609-49c1-9291-8076a3031f8d", "title": "Meta programming", "url": "/zh-CN/docs/Web/JavaScript/Guide/Meta_programming", "tags": ["\u4ee3\u7406", "\u53cd\u5c04", "\u6307\u5357", "JavaScript"], "summary": "\u4eceECMAScript6\u5f00\u59cb\uff0cJavaScript\u5c31\u5f00\u59cb\u652f\u6301<a href=\"/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Proxy\" title=\"Editorial review completed.\"><code>Proxy</code></a>\u548c <a href=\"/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Reflect\" title=\"Reflect &#x5BF9;&#x8C61;&#x63D0;&#x4F9B;&#x4E86;&#x82E5;&#x5E72;&#x4E2A;&#x80FD;&#x5BF9;&#x4EFB;&#x610F;&#x5BF9;&#x8C61;&#x8FDB;&#x884C;&#x67D0;&#x79CD;&#x7279;&#x5B9A;&#x7684;&#x53EF;&#x62E6;&#x622A;&#x64CD;&#x4F5C;&#xFF08;interceptable operation&#xFF09;&#x7684;&#x65B9;&#x6CD5;&#x3002;\"><code>Reflect</code></a>\u5bf9\u8c61\uff0c\u5141\u8bb8\u4f60\u62e6\u622a\u5e76\u5b9a\u5236\u57fa\u7840\u8bed\u8a00\u64cd\u4f5c\u884c\u4e3a\uff08\u6bd4\u5982\uff0c\u5c5e\u6027\u67e5\u627e\uff0c\u8d4b\u503c\uff0c\u679a\u4e3e\uff0c\u51fd\u6570\u8c03\u7528\uff0c\u7b49\u7b49\uff09\u3002\u901a\u8fc7\u8fd9\u4e24\u4e2a\u5bf9\u8c61\uff0c\u4f60\u53ef\u4ee5\u5728JavaScript\u5143\u7ea7\u522b\uff08meta level\uff09\u7f16\u7a0b\u3002", "localization_tags": ["inprogress"], "locale": "zh-CN", "last_edit": "2016-10-05T05:13:53", "review_tags": ["technical", "editorial"]}], "modified": "2016-10-21T07:32:58", "label": "Meta programming", "localization_tags": [], "locale": "en-US", "id": 145779, "last_edit": "2016-10-21T07:32:37", "summary": "Starting with ECMAScript 6, JavaScript gains support for the <a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy\" title=\"The Proxy object is used to define custom behavior for fundamental operations (e.g. property lookup, assignment, enumeration, function invocation, etc).\"><code>Proxy</code></a> and <a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect\" title=\"Reflect is a built-in object that provides methods for interceptable JavaScript operations. The methods are the same as those of proxy handlers. Reflect is not a function object, so it's not constructible.\"><code>Reflect</code></a> objects allowing you to intercept and define custom behavior for fundamental language operations (e.g. property lookup, assignment, enumeration, function invocation, etc). With the help of these two objects you are able to program at the meta level of JavaScript.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Proxies", "title": "Proxies"}, {"id": "Terminology", "title": "Terminology"}, {"id": "Handlers_and_traps", "title": "Handlers and traps"}, {"id": "Revocable_Proxy", "title": "Revocable "}, {"id": "Reflection", "title": "Reflection"}, {"id": "A_better_apply_function", "title": "A better "}, {"id": "Checking_if_property_definition_has_been_successful", "title": "Checking if property definition has been successful"}], "slug": "Web/JavaScript/Guide/Meta_programming", "review_tags": []}