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reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["cache","cache-control","javascript","memory","nodejs","typescript","universal"],"created_at":"2024-11-13T11:23:22.778Z","updated_at":"2026-05-06T04:31:06.594Z","avatar_url":"https://github.com/aneldev.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# DynaCache v3\n\nCaches something and provides it immediately.\n\nPreload, refresh features out of the box.\n\n# createDynaCache\n\nThis factory function creates another function that uses the cache behind this.\n\n## Example\n\nSuppose we have this interface of articles\n```\ninterface ITestArticle {\n  title: string;\n  body: string;\n}\n```\n\nAnd this api method that loads the articles from the backend\n\n```\nconst apiLoadArticles = async (args: {lang: string, group: string}): Promise\u003cITestArticle[]\u003e =\u003e [];\n```\n\nLet's make api method cacheable version of it\n\n```\nconst apiLoadArticlesCacheEngine = createDynaCache({\n  load: apiLoadArticles,\n  expireAfterMinutes: 10,\n});\n```\n\nThe `apiLoadArticlesCacheEngine` is na object, with the `load(args: TArgs)` method that returns data.\n\nThanks to typescript, the function has all types obtained from the `load` method, for the args and for the output.\nSo we don't have to define anything to the generics of the `createDynaCache`.\n\n**Let's use it**\n```\n\napiLoadArticlesCacheEngine.load({lang: 'en', group: 'fashion'})     // We pass the object as we do with the apiLoadArticles\n  .then(articles =\u003e {\n    // We have types articles here\n    articles.forEach(article =\u003e {\n      console.log('Title', article.title);\n    });\n  });\n```\n\n## Configuration object of the `createDynaCache`\n\n```\ninterface ICreateDynaCacheConfig\u003cTArgs, TData, \u003e {\n  load: (args: TArgs) =\u003e Promise\u003cTData\u003e; // The load operation\n  expireAfterMinutes?: number;            // When the cache expires, undefined for none\n  preload?: boolean;                      // Preload the data on start\n  refreshEveryMinutes?: number;           // Refresh the data silently on background\n}\n```\n\n## Invalidate the cache\n\nTo invalidate the cache (to clear the content of the cache) call the `invalidate()`\n\n`apiLoadArticlesCacheEngine.invalidate();`\n\n\n## Don't forget to free() it!\n\nCache keeps resources for refreshing, etc.\n\nIf you are going to free the owner of it, your have to call the `.free()` also!\n\nJust `apiLoadArticlesCacheEngine.free()`.\n\n## How does it works internally?\n\nThe `apiLoadArticlesCacheEngine` creates internally small caches for each different `args`.\n\nIf you ask the same args, then the cached version will be served.\n\n\n# DynaCache\n\nThis is how to create a DynaCache class.\n\n## Config\n```\n interface IDynaCacheConfig\u003cTData\u003e {\n  load: () =\u003e Promise\u003cTData\u003e;       // The load operation\n\n  expireAfterMinutes?: number;      // When the cache expires, undefined for none\n  preload?: boolean;                // Preload the data on start\n  refreshEveryMinutes?: number;     // Refresh the data silently on background\n  onLoad?: (data: TData) =\u003e void;   // Called when the data are loaded for any reason\n}\n```\n\n## Methods\n\n- `load(): Promise\u003cTData\u003e` load from cache or from source if it is not yet cached\n- `loadFresh(): Promise\u003cTData\u003e` load fresh data (not from cache)\n- `invalidate(): void` clear the cache, all further loads will be new\n- `free(): void` destroy the cache (cleans up auto refresh cache)\n\n## Properties\n\n- `get size(): number` returns the size of the cache in bytes\n- `get loadedAt(): number` timestamp when the last load took place\n- `get lastUsedAt(): number` timestamp when the cache read last time\n- `get loadCount(): number` how many the cache was updated\n- `get lastError(): any` last load error\n\n## Example\n```\n// Factory function that create a DynaCache with specific args and api method\n// This function just connects that arguments with the api method\nconst createLoadArticlesCache = (lang: string, group: string) =\u003e\n  new DynaCache({\n    expireAfterMinutes: 10,\n    load: () =\u003e apiLoadArticles(lang, group),\n  });\n\n// Lets create a cache for the epi\nconst loadArticlesCache = createLoadArticlesCache('en', 'fashion');\n\n// Lets use it\nloadArticlesCache.load(); // The return is always up to date and fast\n\n// Don't forget to free() it to avoid memory leaks!\n// This is needed when `expireAfterMinutes` or `refreshEveryMinutes`\nloadArticlesCache.free();\n// Note, now you cannot use it anymore\n```\n\n# Change log\n\n## v3\n\nV3 is totally different approach than V2.\n\nV3 offers plus\n\n- preload\n- refresh\n- cache factory (cache key by args object)\n- simpler code (1/4 of the previous one)\n\n## v2\n\nFor v2 open [this](https://github.com/aneldev/dyna-cache/tree/v2.0.1) page.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Faneldev%2Fdyna-cache","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Faneldev%2Fdyna-cache","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Faneldev%2Fdyna-cache/lists"}