{"json_modified": "2015-04-25T02:20:40.525449", "slug": "Web/JavaScript/Referencje/Obiekty/isNaN", "tags": ["JavaScript"], "locale": "pl", "title": "isNaN()", "translations": [{"title": "isNaN()", "url": "/en-US/docs/Web/JavaScript/Reference/Global_Objects/isNaN", "tags": ["JavaScript"], "summary": "The <code><strong>isNaN()</strong></code> function determines whether a value is <a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/NaN\" title=\"The global NaN property is a value representing Not-A-Number.\"><code>NaN</code></a> or not. Note: coercion inside the <code>isNaN</code> function has <a href=\"#Description\">interesting</a> rules; you may alternatively want to use <a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN\" title=\"The Number.isNaN() method determines whether the passed value is NaN. More robust version of the original global isNaN().\"><code>Number.isNaN()</code></a>, as defined in ECMAScript 6, or you can use <code><a href=\"/en-US/docs/Web/JavaScript/Reference/Operators/typeof\">typeof</a></code> to determine if the value is Not-A-Number.", "localization_tags": [], "locale": "en-US", "last_edit": "2014-11-18T10:13:05", "review_tags": []}, {"title": "isNaN()", "url": "/ja/docs/Web/JavaScript/Reference/Global_Objects/isNaN", "tags": ["JavaScript"], "summary": "\u5f15\u6570\u304c\u6570\u3067\u306a\u3044\u304b\u3069\u3046\u304b\u3092\u8a55\u4fa1\u3057\u307e\u3059\u3002", "localization_tags": ["inprogress"], "locale": "ja", "last_edit": "2015-04-15T00:48:55", "review_tags": []}, {"title": "isNaN()", "url": "/fr/docs/Web/JavaScript/Reference/Objets_globaux/isNaN", "tags": ["R\u00e9f\u00e9rence", "Reference", "JavaScript"], "summary": "", "localization_tags": [], "locale": "fr", "last_edit": "2015-02-21T09:28:42", "review_tags": []}, {"title": "isNaN", "url": "/es/docs/Web/JavaScript/Referencia/Objetos_globales/isNaN", "tags": [], "summary": "Eval\u00faa un argumento para determinar si es un n\u00famero.", "localization_tags": [], "locale": "es", "last_edit": "2014-11-19T12:21:07", "review_tags": []}, {"title": "isNaN", "url": "/ru/docs/Web/JavaScript/Reference/Global_Objects/isNaN", "tags": ["Method", "Functions", "JavaScript"], "summary": "\u0424\u0443\u043d\u043a\u0446\u0438\u044f <code><strong>isNaN()</strong></code> \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0435\u0442 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043b\u0438 \u043b\u0438\u0442\u0435\u0440\u0430\u043b \u0438\u043b\u0438 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0430\u044f \u043d\u0435 \u0447\u0438\u0441\u043b\u043e\u0432\u044b\u043c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435\u043c (<a href=\"/ru/docs/Web/JavaScript/Reference/Global_Objects/NaN\" title=\"&#x413;&#x43B;&#x43E;&#x431;&#x430;&#x43B;&#x44C;&#x43D;&#x43E;&#x435; &#x441;&#x432;&#x43E;&#x439;&#x441;&#x442;&#x432;&#x43E; NaN &#x44F;&#x432;&#x43B;&#x44F;&#x435;&#x442;&#x441;&#x44F; &#x437;&#x43D;&#x430;&#x447;&#x435;&#x43D;&#x438;&#x435;&#x43C;, &#x43F;&#x440;&#x435;&#x434;&#x441;&#x442;&#x430;&#x432;&#x43B;&#x44F;&#x44E;&#x449;&#x438;&#x43C; &#x43D;&#x435;-&#x447;&#x438;&#x441;&#x43B;&#x43E; (Not-A-Number).\"><code>NaN</code></a>) \u0438\u043b\u0438 \u043d\u0435\u0442. \u041f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 \u0441 \u0444\u0443\u043d\u043a\u0446\u0438\u0435\u0439 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0442\u044c \u043e\u0441\u0442\u043e\u0440\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0442\u0430\u043a \u043a\u0430\u043a \u043e\u043d\u0430 <a href=\"#Description\">\u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e</a>. \u0415\u0441\u043b\u0438 \u0432\u0430\u043c \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u043e \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u0435\u0435 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c <a href=\"/ru/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN\" title=\"&#x41C;&#x435;&#x442;&#x43E;&#x434; Number.isNaN() &#x43E;&#x43F;&#x440;&#x435;&#x434;&#x435;&#x43B;&#x44F;&#x435;&#x442;, &#x44F;&#x432;&#x43B;&#x44F;&#x435;&#x442;&#x441;&#x44F; &#x43B;&#x438; &#x43F;&#x435;&#x440;&#x435;&#x434;&#x430;&#x43D;&#x43D;&#x43E;&#x435; &#x437;&#x43D;&#x430;&#x447;&#x435;&#x43D;&#x438;&#x435; NaN. &#x42D;&#x442;&#x43E; &#x431;&#x43E;&#x43B;&#x435;&#x435; &#x43D;&#x430;&#x434;&#x451;&#x436;&#x43D;&#x430;&#x44F; &#x432;&#x435;&#x440;&#x441;&#x438;&#x44F; &#x43E;&#x440;&#x438;&#x433;&#x438;&#x43D;&#x430;&#x43B;&#x44C;&#x43D;&#x43E;&#x439; &#x433;&#x43B;&#x43E;&#x431;&#x430;&#x43B;&#x44C;&#x43D;&#x43E;&#x439; &#x444;&#x443;&#x43D;&#x43A;&#x446;&#x438;&#x438; isNaN().\"><code>Number.isNaN()</code></a> \u0442\u043e \u043a\u0430\u043a \u043e\u043d\u0430 \u043e\u043f\u0438\u0441\u0430\u043d\u0430 \u0432 ECMAScript 6, \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0430\u043b\u044c\u0442\u0435\u0440\u043d\u0430\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c <code><a href=\"/en-US/docs/Web/JavaScript/Reference/Operators/typeof\">typeof</a></code> \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043b\u0438\u0442\u0435\u0440\u0430\u043b\u0430 \u0438\u043b\u0438 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u043d\u0430 \u043d\u0435 \u0447\u0438\u0441\u043b\u043e\u0432\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435.", "localization_tags": [], "locale": "ru", "last_edit": "2014-12-17T04:22:36", "review_tags": ["technical"]}, {"title": "isNaN()", "url": "/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/isNaN", "tags": ["JavaScript"], "summary": "A fun\u00e7\u00e3o <code>insNAN ()</code> determina se o valor \u00e9 <a href=\"/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/NaN\" title=\"The documentation about this has not yet been written; please consider contributing!\"><code>NaN</code></a> ou n\u00e3o. Tenha cuidado, essa fun\u00e7\u00e3o \u00e9 quabrada. Voc\u00ea pode ficar interessado no <a href=\"/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN\" title=\"O m&#xE9;todo&#xA0;Number.isNaN() determina se o valor passado &#xE9; NaN. Vers&#xE3;o mais robusta do original global isNaN.\"><code>Number.isNaN()</code></a> que foi definido no ECMAScript 6 ou voc\u00ea pode usar <code>typeof</code> para determinar se o valor \u00e9 Not-A-Number, <code>NaN</code>.", "localization_tags": [], "locale": "pt-BR", "last_edit": "2014-11-19T12:35:12", "review_tags": []}, {"title": "isNaN()", "url": "/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/isNaN", "tags": ["JavaScript"], "summary": "<code><strong>isNaN()</strong></code> \u51fd\u6570\u7528\u6765\u5224\u65ad\u4e00\u4e2a\u503c\u662f\u5426\u4e3a <a href=\"/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/NaN\" title=\"&#x5168;&#x5C40;&#x5C5E;&#x6027; NaN &#x8868;&#x793A; Not-A-Number &#x7684;&#x503C;&#x3002;\"><code>NaN</code></a>\u3002\u6ce8\uff1a<code>isNaN</code>\u51fd\u6570\u5305\u542b\u4e00\u4e9b\u975e\u5e38\u6709\u610f\u601d\u7684\u5f3a\u5236\u8f6c\u6362<a href=\"#Description\">\u89c4\u5219</a>\uff1b\u4f60\u4e5f\u53ef\u4ee5\u901a\u8fc7\u00a0ECMAScript 6 \u4e2d\u5b9a\u4e49\u7684\u00a0<a href=\"/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN\" title=\"Number.isNaN() &#x65B9;&#x6CD5;&#x7528;&#x6765;&#x68C0;&#x6D4B;&#x4F20;&#x5165;&#x7684;&#x503C;&#x662F;&#x5426;&#x662F; NaN&#x3002;&#x8BE5;&#x65B9;&#x6CD5;&#x6BD4;&#x4F20;&#x7EDF;&#x7684;&#x5168;&#x5C40;&#x51FD;&#x6570; isNaN() &#x66F4;&#x53EF;&#x9760;&#x3002;\"><code>Number.isNaN()</code></a> \u6216\u8005\u00a0<code><a href=\"/en-US/docs/Web/JavaScript/Reference/Operators/typeof\">typeof</a></code> \u6765\u5224\u65ad\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u975e\u6570\u503c\u3002", "localization_tags": ["inprogress"], "locale": "zh-CN", "last_edit": "2015-02-12T16:50:33", "review_tags": []}, {"title": "isNaN()", "url": "/de/docs/Web/JavaScript/Reference/Global_Objects/isNaN", "tags": [], "summary": "Die <code><strong>isNaN()</strong></code> Methode pr\u00fcft, ob ein Wert <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/NaN\" title=\"Die globale NaN Eigenschaft ist ein Wert, der Not-A-Number (keine Zahl) repr&#xE4;sentiert.\"><code>NaN</code></a> ist.<br/>\n Bemerkung: Aufgrund innerer Zw\u00e4nge weist die <code>isNaN</code> Methode <a href=\"#Description\">interessante</a> Regeln auf. Alternativ kann die in ECMAScript 6 definierte Methode <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN\" title=\"Die Number.isNaN() Methode stellt fest, ob ein ihr &#xFC;bergebener Wert NaN ist. Dieses ist eine robustere Version der globalen Methode isNaN()\"><code>Number.isNaN()</code></a> genutzt werden oder man kann mit <code><a href=\"/en-US/docs/Web/JavaScript/Reference/Operators/typeof\">typeof</a></code> feststellen, ob der Wert nicht vom Typ number ist.", "localization_tags": ["inprogress"], "locale": "de", "last_edit": "2015-03-12T07:58:55", "review_tags": ["technical"]}, {"title": "isNaN()", "url": "/it/docs/Web/JavaScript/Reference/Global_Objects/isNaN", "tags": [], "summary": "La funzione <strong><code>isNaN()</code></strong> determina se un valore \u00e8 <a href=\"/it/docs/Web/JavaScript/Reference/Global_Objects/NaN\" title=\"La propriet&#xE0; globale&#xA0;NaN&#xA0;&#xE8; un valore che rappresenta un non numero&#xA0;(Not-a-Number).\"><code>NaN</code></a> o no.", "localization_tags": [], "locale": "it", "last_edit": "2015-04-12T10:01:39", "review_tags": ["editorial"]}], "modified": "2015-04-25T02:20:37", "label": "isNaN()", "localization_tags": [], "url": "/pl/docs/Web/JavaScript/Referencje/Obiekty/isNaN", "last_edit": "2015-04-25T02:20:29", "summary": "Sprawdza, czy argument nie ma warto\u015bci NaN (\"nie-liczba\").", "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 Obiekty Array ArrayBuffer [Translate] Boolean 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 [Translate] Map [Translate] Math NaN Number Object ParallelArray [Translate] Promise [Translate] Proxy [Translate] RangeError [Translate] ReferenceError [Translate] Reflect [Translate] RegExp SIMD [Translate] Set [Translate] StopIteration [Translate] String Symbol [Translate] SyntaxError [Translate] TypeError [Translate] TypedArray [Translate] URIError [Translate] Uint16Array Uint32Array [Translate] Uint8Array [Translate] Uint8ClampedArray [Translate] WeakMap [Translate] WeakSet [Translate] decodeURI() decodeURIComponent() encodeURI() encodeURIComponent() escape() [Translate] eval() [Translate] isFinite() isNaN() null [Translate] parseFloat() parseInt() undefined unescape() [Translate] uneval() [Translate] Expressions & operators Operatory Operatory arytmetyczne Array comprehensions [Translate] Operatory przypisania Bitwise operators [Translate] Operator przecinkowy Operatory por\u00f3wnania Operator warunkowy Destructuring assignment [Translate] Expression closures [Translate] Generator comprehensions [Translate] Grouping operator [Translate] Legacy generator function expression [Translate] Logical Operators [Translate] Object initializer [Translate] Pierwsze\u0144stwo operator\u00f3w Operatory pami\u0119ci Spread operator [Translate] class expression [Translate] Operator delete Operator function function* expression [Translate] Operator in Operator instanceof Operator new super [Translate] this Operator typeof Operator void yield [Translate] yield* [Translate] Statements & declarations Polecenia Legacy generator function [Translate] block break class [Translate] const continue [Translate] debugger [Translate] do...while empty [Translate] export for for each...in [Translate] for...in [Translate] for...of [Translate] function function* [Translate] if...else import etykieta let [Translate] return switch throw try...catch [Translate] var while with [Translate] Functions Functions [Translate] arguments Arrow functions [Translate] 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 ECMAScript 5 support in Mozilla [Translate] ECMAScript 6 support in Mozilla [Translate] 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] Nowo\u015bci w JavaScript 1.4 Nowo\u015bci w JavaScript 1.5 Nowo\u015bci w JavaScript 1.6 Nowo\u015bci w JavaScript 1.7 Nowo\u015bci w JavaScript 1.8 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": "Podsumowanie", "title": "Podsumowanie"}, {"id": "Sk.C5.82adnia", "title": "Sk\u0142adnia"}, {"id": "Parametry", "title": "Parametry"}, {"id": "Opis", "title": "Opis"}, {"id": "Przyk.C5.82ady", "title": "Przyk\u0142ady"}, {"id": "Przyk.C5.82ad:_Zastosowanie_isNaN", "title": "Przyk\u0142ad: Zastosowanie isNaN"}, {"id": "Zobacz_tak.C5.BCe", "title": "Zobacz tak\u017ce"}], "id": 37352, "review_tags": []}