{"json_modified": "2015-04-25T16:02:33.761917", "slug": "Web/JavaScript/Reference/Global_Objects/undefined", "tags": [], "locale": "pt-BR", "title": "undefined", "translations": [{"title": "undefined", "url": "/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined", "tags": ["JavaScript"], "summary": "The global <code><strong>undefined</strong></code> property represents the primitive value <code><a class=\"glossaryLink\" href=\"/en-US/docs/Glossary/Undefined\" title=\"undefined: A primitive value automatically assigned to variables that have just been declared or to formal arguments for which there are no actual arguments.\">undefined</a></code>. It is one of JavaScript's <a class=\"glossaryLink\" href=\"/en-US/docs/Glossary/Primitive\" title=\"primitive types: A primitive (primitive value, primitive data type) is data that is not an object and has no methods.\">primitive types</a>.", "localization_tags": [], "locale": "en-US", "last_edit": "2015-03-27T02:31:42", "review_tags": []}, {"title": "undefined", "url": "/ja/docs/Web/JavaScript/Reference/Global_Objects/undefined", "tags": ["JavaScript"], "summary": "\u672a\u5b9a\u7fa9\u3067\u3042\u308b\u4e8b\u3092\u610f\u5473\u3059\u308b\u5024\u3002", "localization_tags": ["inprogress"], "locale": "ja", "last_edit": "2015-04-15T00:51:20", "review_tags": []}, {"title": "undefined", "url": "/es/docs/Web/JavaScript/Referencia/Objetos_globales/undefined", "tags": ["JavaScript"], "summary": "El valor undefined.", "localization_tags": [], "locale": "es", "last_edit": "2014-11-19T12:26:22", "review_tags": []}, {"title": "undefined", "url": "/pl/docs/Web/JavaScript/Referencje/Obiekty/undefined", "tags": ["JavaScript"], "summary": "Warto\u015b\u0107 niezdefiniowana.", "localization_tags": [], "locale": "pl", "last_edit": "2015-04-25T02:23:27", "review_tags": []}, {"title": "undefined", "url": "/fr/docs/Web/JavaScript/Reference/Objets_globaux/undefined", "tags": ["R\u00e9f\u00e9rence", "Reference", "R\u00e9ference", "JavaScript"], "summary": "La propri\u00e9t\u00e9 globale <strong><code>undefined</code></strong> repr\u00e9sente la valeur <code>undefined</code><em>.</em> Cette valeur est l'<a href=\"/fr/docs/Web/JavaScript/Structures_de_donn&#xE9;es#Le_type_ind.C3.A9fini\">un des types primitifs de JavaScript</a>.", "localization_tags": [], "locale": "fr", "last_edit": "2015-04-07T13:38:37", "review_tags": []}, {"title": "undefined", "url": "/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/undefined", "tags": [], "summary": "<code>undefined</code>\u6709\u591a\u91cd\u89d2\u8272,\u901a\u5e38\u60c5\u51b5\u4e0b,\u6211\u4eec\u6240\u8bf4\u7684<code>undefined</code>\u90fd\u6307\u7684\u662f\u5168\u5c40\u5bf9\u8c61\u7684\u4e00\u4e2a\u5c5e\u6027<code>\"undefined\"</code>.", "localization_tags": [], "locale": "zh-CN", "last_edit": "2015-04-18T00:35:31", "review_tags": []}, {"title": "undefined", "url": "/ru/docs/Web/JavaScript/Reference/Global_Objects/undefined", "tags": ["JavaScript"], "summary": "\u0417\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0433\u043b\u043e\u0431\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430 <code><strong>undefined</strong></code> \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 <code>undefined</code>. \u042d\u0442\u043e \u043e\u0434\u043d\u043e \u0438\u0437 <a class=\"glossaryLink\" href=\"/en-US/docs/Glossary/Primitive\" title=\"&#x43F;&#x440;&#x438;&#x43C;&#x438;&#x442;&#x438;&#x432;&#x43D;&#x44B;&#x445; &#x437;&#x43D;&#x430;&#x447;&#x435;&#x43D;&#x438;&#x439;: A primitive (primitive value, primitive data type) is data that is not an object and has no methods.\">\u043f\u0440\u0438\u043c\u0438\u0442\u0438\u0432\u043d\u044b\u0445 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0439</a> JavaScript.", "localization_tags": [], "locale": "ru", "last_edit": "2014-11-19T12:37:14", "review_tags": []}, {"title": "undefined", "url": "/de/docs/Web/JavaScript/Reference/Global_Objects/undefined", "tags": ["JavaScript"], "summary": "Die globale Eigenschaft <code><strong>undefined</strong></code> repr\u00e4sentiert den Wert <code>undefined</code>. Dieser Wert ist einer der <a class=\"glossaryLink\" href=\"/de/docs/Glossary/Primitive\" title=\"Die Definition dieses Ausdrucks (primitiven Typen) wurde noch nicht geschrieben; bitte hilf mit und trage sie bei!\">primitiven Typen</a> in JavaScript.", "localization_tags": [], "locale": "de", "last_edit": "2015-01-21T01:35:47", "review_tags": []}, {"title": "undefined", "url": "/ca/docs/Web/JavaScript/Referencia/Objectes_standard/undefined", "tags": [], "summary": "El valor de la propietat global <code><strong>undefined</strong></code> representa el valor <code>undefined</code>. \u00c9s un dels <a class=\"glossaryLink\" href=\"/en-US/docs/Glossary/Primitive\" title=\"tipus primitius: A primitive (primitive value, primitive data type) is data that is not an Object and does not have any methods.\">tipus primitius</a> de JavaScript.", "localization_tags": [], "locale": "ca", "last_edit": "2015-02-12T17:01:35", "review_tags": ["editorial"]}, {"title": "undefined", "url": "/it/docs/Web/JavaScript/Reference/Global_Objects/undefined", "tags": [], "summary": "La variabile globale\u00a0<strong><code>undefined</code></strong>\u00a0rappresenta il valore primitivo\u00a0<span style=\"font-family: Consolas, Monaco, 'Andale Mono', monospace;\"><a class=\"glossaryLink\" href=\"/en-US/docs/Glossary/Undefined\" title=\"undefined: A primitive value automatically assigned to variables that have just been declared or to formal arguments for which there are no actual arguments.\">undefined</a></span>.\u00a0\u00c8 uno dei <a class=\"glossaryLink\" href=\"/en-US/docs/Glossary/Primitive\" title=\"valori primitivi: A primitive (primitive value, primitive data type) is data that is not an object and has no methods.\">valori primitivi</a> di JavaScript.", "localization_tags": [], "locale": "it", "last_edit": "2015-04-12T06:23:10", "review_tags": []}], "modified": "2015-04-25T16:02:30", "label": "undefined", "localization_tags": [], "url": "/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/undefined", "last_edit": "2015-02-15T15:36:33", "summary": "O valor global <code>undefined</code> representa um valor indefinido. Trata-se de um dos\u00a0<a class=\"glossaryLink\" href=\"/pt-BR/docs/Glossario/Primitivo\" title=\"tipos primitivos: Um&#xA0;primitivo&#xA0;(valor primitivo, tipo de dados primitivo) &#xE9; um dado que n&#xE3;o &#xE9; representado atrav&#xE9;s de um&#xA0;Objeto e, por consequ&#xEA;ncia, n&#xE3;o possui m&#xE9;todos.\">tipos primitivos</a> do JavaScript.", "sections": [{"id": "Quick_Links", "title": "JavaScript Tutorials: JavaScript Guide Introduction Grammar and types Control flow and error handling Loops and iteration Functions Expressions and operators Numbers and dates Text formatting Regular expressions Indexed collections Keyed collections Working with objects Details of the object model Iterators and generators Meta programming Introductory JavaScript basics JavaScript technologies overview Introduction to Object Oriented JavaScript Intermediate A re-introduction to JavaScript JavaScript data structures Equality comparisons and sameness Closures Advanced Inheritance and the prototype chain Strict mode JavaScript typed arrays Memory Management Concurrency model and Event Loop References: Built-in objects Objetos Globais Array ArrayBuffer Boolean [Translate] DataView [Translate] Date Error [Translate] EvalError [Translate] Float32Array [Translate] Float64Array [Translate] Function Generator [Translate] GeneratorFunction [Translate] Infinity Int16Array [Translate] Int32Array [Translate] Int8Array [Translate] InternalError [Translate] Intl [Translate] Intl.Collator [Translate] Intl.DateTimeFormat [Translate] Intl.NumberFormat [Translate] Iterator [Translate] JSON Map [Translate] Math NaN Number Object ParallelArray [Translate] Promise Proxy [Translate] RangeError [Translate] ReferenceError [Translate] Reflect [Translate] RegExp SIMD [Translate] Set StopIteration [Translate] String Symbol SyntaxError [Translate] TypeError [Translate] TypedArray [Translate] URIError [Translate] Uint16Array [Translate] Uint32Array [Translate] Uint8Array [Translate] Uint8ClampedArray [Translate] WeakMap WeakSet [Translate] decodeURI() [Translate] decodeURIComponent() [Translate] encodeURI() [Translate] encodeURIComponent() [Translate] escape() [Translate] eval() isFinite() [Translate] isNaN() null parseFloat() [Translate] parseInt() undefined unescape() [Translate] uneval() [Translate] Expressions & operators Operators Arithmetic operators [Translate] Array comprehensions Assignment operators [Translate] Bitwise operators [Translate] Operador V\u00edrgula Comparison operators [Translate] Operador Condicional Tern\u00e1rio Destructuring assignment [Translate] Expression closures [Translate] Generator comprehensions [Translate] Operador de Agrupamento Legacy generator function expression [Translate] Operadores L\u00f3gicos Object initializer [Translate] Preced\u00eancia de Operadores Property accessors [Translate] Spread operator [Translate] class expression [Translate] delete operator [Translate] function expression [Translate] function* expression [Translate] in operator [Translate] instanceof new operator [Translate] super [Translate] this [Translate] typeof void operator [Translate] yield [Translate] yield* [Translate] Statements & declarations Statements Legacy generator function [Translate] block [Translate] break class [Translate] const continue [Translate] debugger [Translate] do...while empty [Translate] export [Translate] for [Translate] for each...in [Translate] for...in [Translate] for...of [Translate] function [Translate] function* if...else [Translate] import [Translate] label (Etiqueta) let return [Translate] switch throw [Translate] try...catch var while [Translate] with [Translate] Functions Functions Arguments object [Translate] Arrow functions Default parameters [Translate] Method definitions [Translate] Rest parameters [Translate] getter [Translate] setter [Translate] Classes Classes [Translate] constructor [Translate] extends [Translate] static [Translate] Misc Lexical grammar JavaScript data structures Enumerability and ownership of properties Iteration protocols Strict mode Transitioning to strict mode Template strings Deprecated features New in JavaScript New in JavaScript [Translate] ECMAScript 5 support in Mozilla [Translate] Suporte ao ECMAScript 6 na Mozilla ECMAScript 7 support in Mozilla [Translate] Firefox JavaScript changelog [Translate] New in JavaScript 1.1 [Translate] New in JavaScript 1.2 [Translate] New in JavaScript 1.3 [Translate] New in JavaScript 1.4 [Translate] New in JavaScript 1.5 [Translate] New in JavaScript 1.6 [Translate] New in JavaScript 1.7 [Translate] New in JavaScript 1.8 [Translate] New in JavaScript 1.8.1 [Translate] New in JavaScript 1.8.5 [Translate] Documentation: Useful lists All pages index Methods index Properties index Pages tagged \"JavaScript\" Contribute JavaScript doc status The MDN project"}, {"id": "Summary", "title": "Resumo"}, {"id": "Syntax", "title": "Sintaxe"}, {"id": "Description", "title": "Descri\u00e7\u00e3o"}, {"id": "Exemplos", "title": "Exemplos"}, {"id": "Igualdade_estrita_(.3D.3D.3D)_e_undefined", "title": "Igualdade estrita (===)\u00a0e undefined"}, {"id": "Operador_Typeof_e_undefined", "title": "Operador\u00a0Typeof e undefined"}, {"id": "Operador_Void_e_undefined", "title": "Operador Void e undefined"}, {"id": "Especifica.C3.A7.C3.A3o", "title": "Especifica\u00e7\u00e3o"}, {"id": "Compatibilidade_entre_navegadores", "title": "Compatibilidade entre navegadores"}], "id": 135973, "review_tags": []}