{"json_modified": "2016-09-15T02:31:34.860035", "uuid": "666aa344-cb31-42f6-ae11-3259baaa2595", "title": "CacheStorage.has()", "url": "/en-US/docs/Web/API/CacheStorage/has", "tags": ["API", "ServiceWorker", "Reference", "Experimental", "R\u00e9f\u00e9rence", "Exp\u00e9rimental", "CacheStorage", "has", "Service Workers", "Method"], "translations": [{"uuid": "3126b05d-46ad-4915-8a12-c567323598ff", "title": "CacheStorage.has()", "url": "/fr/docs/Web/API/CacheStorage/has", "tags": ["R\u00e9f\u00e9rence", "API", "Service Workers", "Exp\u00e9rimental"], "summary": "La m\u00e9thode\u00a0<strong><code>has()</code></strong>\u00a0de l'interface\u00a0<a href=\"/fr/docs/Web/API/CacheStorage\" title=\"L'interface&#xA0;CacheStorage de l'API ServiceWorker&#xA0;repr&#xE9;sente le stockage pour les objets Cache. Elle fournit un r&#xE9;pertoire g&#xE9;n&#xE9;ral&#xA0;de tous les caches auquel un&#xA0;ServiceWorker peut acc&#xE9;der, et maintient une correspondance entre les cha&#xEE;nes de noms et ces objets&#xA0;Cache.\"><code>CacheStorage</code></a> retourne une\u00a0<a href=\"/fr/docs/Web/JavaScript/Reference/Objets_globaux/Promise\" title=\"L'interface Promise repr&#xE9;sente un interm&#xE9;diaire (proxy) vers une valeur qui n'est pas n&#xE9;cessairement connue au moment de sa cr&#xE9;ation. Cela permet de g&#xE9;rer des actions asynchrones et de leur associer des gestionnaires d'erreur. Ainsi, des m&#xE9;thodes asynchrones renvoient des valeurs comme les m&#xE9;thodes synchrones, la seule diff&#xE9;rence est que la valeur retourn&#xE9;e par la m&#xE9;thode asynchrone est une promesse (d'avoir une valeur plus tard).\"><code>Promise</code></a> qui renvoie\u00a0<code>true</code> si un objet\u00a0<a href=\"/fr/docs/Web/API/Cache\" title=\"L'interface Cache de l' API ServiceWorker repr&#xE9;sente le stockage pour les paires d'objet Request / Response object qui sont mises en cache dans le cadre du cycle de vie d'un ServiceWorker.\"><code>Cache</code></a> est \u00e9gal au\u00a0<code>cacheName</code>.", "localization_tags": [], "locale": "fr", "last_edit": "2016-05-04T10:58:02", "review_tags": []}], "modified": "2016-09-15T02:31:34", "label": "CacheStorage.has()", "localization_tags": [], "locale": "en-US", "id": 145769, "last_edit": "2016-09-15T02:31:28", "summary": "The <strong><code>has()</code></strong> method of the <a href=\"/en-US/docs/Web/API/CacheStorage\" title=\"The CacheStorage interface represents the storage for Cache objects. It provides a master directory of all the named caches that a ServiceWorker, other type of worker or window scope can access (you don't have to use it with service workers, even though that is the spec that defines it) and maintains a mapping of string names to corresponding Cache objects.\"><code>CacheStorage</code></a> interface returns a <a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise\" title=\"The Promise object is used for asynchronous computations. A Promise represents a value which may be available now, or in the future, or never.\"><code>Promise</code></a> that resolves to <code>true</code> if a <a href=\"/en-US/docs/Web/API/Cache\" title=\"The Cache interface provides a storage mechanism for Request / Response object pairs that are cached, for example as part of the ServiceWorker life cycle. Note that the Cache interface is exposed to windowed scopes as well as workers. You don't have to use it in conjunction with service workers, even though it is defined in the service worker spec.\"><code>Cache</code></a> object matches the <code>cacheName</code>.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Returns", "title": "Returns"}, {"id": "Parameters", "title": "Parameters"}, {"id": "Examples", "title": "Examples"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}, {"id": "See_also", "title": "See also"}], "slug": "Web/API/CacheStorage/has", "review_tags": ["technical"]}