{"id":5338,"date":"2024-12-01T05:45:13","date_gmt":"2024-12-01T02:45:13","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi\/"},"modified":"2024-12-01T05:45:13","modified_gmt":"2024-12-01T02:45:13","slug":"typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi\/","title":{"rendered":"TypeScript ile Tiplerin Biriktirilmesi: T\u00fcm fetch() Sonu\u00e7lar\u0131n\u0131n Tiplenmesi"},"content":{"rendered":"<p>TypeScript ile Tiplerin Biriktirilmesi: T\u00fcm fetch() Sonu\u00e7lar\u0131n\u0131n Tiplenmesi<\/p>\n<p>Merhaba, ben Fatih Soysal. Bu yaz\u0131da, TypeScript kullanarak  fetch() fonksiyonunun farkl\u0131 API u\u00e7 noktalar\u0131ndan d\u00f6nd\u00fcrebilece\u011fi \u00e7e\u015fitli veri tiplerini nas\u0131l ele alabilece\u011fimizi,  t\u00fcm olas\u0131 sonu\u00e7lar\u0131 kapsayacak \u015fekilde tiplemeyi \u00f6\u011frenece\u011fiz.  \u00d6zellikle,  birden \u00e7ok API \u00e7a\u011fr\u0131s\u0131 yapt\u0131\u011f\u0131m\u0131z ve her birinin farkl\u0131 bir veri yap\u0131s\u0131 d\u00f6nd\u00fcrd\u00fc\u011f\u00fc senaryolar i\u00e7in pratik \u00e7\u00f6z\u00fcmler sunaca\u011f\u0131m.  Bu durum, karma\u015f\u0131k uygulamalar geli\u015ftirme s\u00fcrecinde s\u0131k\u00e7a kar\u015f\u0131la\u015f\u0131lan bir sorundur ve \u00e7\u00f6z\u00fcm\u00fc i\u00e7in etkili y\u00f6ntemler \u00f6\u011frenmek olduk\u00e7a \u00f6nemlidir.<\/p>\n<h2>Sorunun Tan\u0131m\u0131<\/h2>\n<p>Birden \u00e7ok API u\u00e7 noktas\u0131ndan veri \u00e7ekti\u011fimizi d\u00fc\u015f\u00fcnelim.  Her u\u00e7 nokta farkl\u0131 bir JSON yap\u0131s\u0131 d\u00f6nd\u00fcr\u00fcyorsa, TypeScript&#8217;in g\u00fc\u00e7l\u00fc tip sistemini kullanarak bu \u00e7e\u015fitlili\u011fi nas\u0131l ele alabiliriz?  Her API \u00e7a\u011fr\u0131s\u0131 i\u00e7in ayr\u0131 bir tip tan\u0131mlamak zahmetli ve s\u00fcrd\u00fcr\u00fclebilirlik a\u00e7\u0131s\u0131ndan sorunlu olabilir.  \u0130\u015fte tam bu noktada, TypeScript&#8217;in sa\u011flad\u0131\u011f\u0131 tip birle\u015ftirme (type union) ve ko\u015fullu tip (conditional type) mekanizmalar\u0131 devreye giriyor.  Bu mekanizmalar\u0131 kullanarak, t\u00fcm olas\u0131 sonu\u00e7lar\u0131 tek bir tipte birle\u015ftirebiliriz.  Bu sayede kodumuz daha temiz, daha okunabilir ve hata ay\u0131klama s\u00fcreci daha kolay olacakt\u0131r.<\/p>\n<h2>Tip Birle\u015ftirme (Union Types) ile \u00c7\u00f6z\u00fcm<\/h2>\n<p>TypeScript&#8217;te tip birle\u015ftirme, farkl\u0131 tiplerin bir birle\u015fimi ile yeni bir tip olu\u015fturmam\u0131z\u0131 sa\u011flar.  \u00d6rne\u011fin,  bir API \u00e7a\u011fr\u0131s\u0131 kullan\u0131c\u0131 verisi d\u00f6nd\u00fcr\u00fcrken, di\u011feri \u00fcr\u00fcn verisi d\u00f6nd\u00fcr\u00fcyorsa, bu iki farkl\u0131 tipi birle\u015ftirebiliriz.  Bu sayede fonksiyonumuzun d\u00f6nd\u00fcrd\u00fc\u011f\u00fc tip belirsiz kalmaz.  Bu durum, kodumuzun tipler a\u00e7\u0131s\u0131ndan daha g\u00fcvenilir olmas\u0131n\u0131 sa\u011flar.<\/p>\n<pre><code class=\"language-typescript\">\ninterface User {\n  id: number;\n  name: string;\n}\n\ninterface Product {\n  id: number;\n  name: string;\n  price: number;\n}\n\ntype ApiResult = User | Product;\n\nconst fetchData = async (): Promise&lt;ApiResult&gt; => {\n  \/\/ ... API \u00e7a\u011fr\u0131s\u0131 ve sonu\u00e7 i\u015fleme ...\n};\n<\/code><\/pre>\n<p>Yukar\u0131daki \u00f6rnekte, ApiResult tipi, User ve Product tiplerinin bir birle\u015fimidir.  fetchData fonksiyonu bu tipte bir de\u011fer d\u00f6nd\u00fcr\u00fcr.  Dolay\u0131s\u0131yla, fonksiyonun d\u00f6nd\u00fcrd\u00fc\u011f\u00fc de\u011feri kullanmadan \u00f6nce,  User veya Product tipinde olup olmad\u0131\u011f\u0131n\u0131 kontrol etmemiz gerekebilir.  Bu kontrol\u00fc typeof operat\u00f6r\u00fc veya instanceof operat\u00f6r\u00fc ile yapabiliriz.  Bu sayede kodumuzda olas\u0131 tip hatalar\u0131n\u0131 \u00f6nlemi\u015f oluruz.  Alternatif olarak,  daha sofistike bir \u00e7\u00f6z\u00fcm olarak, ko\u015fullu tipler kullanabiliriz.<\/p>\n<h2>Ko\u015fullu Tipler (Conditional Types) ile Geli\u015fmi\u015f \u00c7\u00f6z\u00fcm<\/h2>\n<p>Ko\u015fullu tipler, daha karma\u015f\u0131k senaryolarda tip kontrol\u00fcn\u00fc kolayla\u015ft\u0131r\u0131r.  Bir API \u00e7a\u011fr\u0131s\u0131n\u0131n ba\u015far\u0131l\u0131 olup olmad\u0131\u011f\u0131n\u0131 kontrol edip, buna g\u00f6re farkl\u0131 tipler d\u00f6nd\u00fcrebiliriz.  Bu sayede, hata durumlar\u0131n\u0131 daha iyi ele alabiliriz.<\/p>\n<pre><code class=\"language-typescript\">\ntype ApiResponse&lt;T&gt; = \n  { success: true; data: T } | \n  { success: false; error: string };\n\nconst fetchData2 = async &lt;T&gt;(): Promise&lt;ApiResponse&lt;T&gt;&gt; => {\n    \/\/ ... API \u00e7a\u011fr\u0131s\u0131 ve sonu\u00e7 i\u015fleme ...\n};\n\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, ApiResponse ko\u015fullu tipi, API \u00e7a\u011fr\u0131s\u0131n\u0131n ba\u015far\u0131l\u0131 olup olmad\u0131\u011f\u0131na ba\u011fl\u0131 olarak farkl\u0131 tipler d\u00f6nd\u00fcr\u00fcr.  Ba\u015far\u0131l\u0131 ise data alan\u0131nda T tipindeki veriyi, ba\u015far\u0131s\u0131z ise error alan\u0131nda hata mesaj\u0131n\u0131 d\u00f6nd\u00fcr\u00fcr.  Bu sayede, API \u00e7a\u011fr\u0131s\u0131n\u0131n sonucunu daha g\u00fcvenli bir \u015fekilde i\u015fleyebiliriz.  Daha temiz ve anla\u015f\u0131l\u0131r kod yazmak i\u00e7in bu y\u00f6ntem idealdir.<\/p>\n<h2>Genel \u00d6neriler<\/h2>\n<p>Birden \u00e7ok API u\u00e7 noktas\u0131ndan veri \u00e7ekerken, tip g\u00fcvenli\u011fini sa\u011flamak i\u00e7in yukar\u0131da bahsedilen y\u00f6ntemleri kullanman\u0131z\u0131 \u00f6neririm.  Tip birle\u015ftirme ve ko\u015fullu tipler, TypeScript&#8217;in sundu\u011fu g\u00fc\u00e7l\u00fc \u00f6zelliklerden sadece birka\u00e7\u0131d\u0131r.  Bu \u00f6zelliklerle birlikte, daha sa\u011flam ve g\u00fcvenilir uygulamalar geli\u015ftirebilirsiniz.  Kodunuzun okunabilirli\u011fini ve s\u00fcrd\u00fcr\u00fclebilirli\u011fini art\u0131rmak i\u00e7in  iyi bir kod d\u00fczenine uyman\u0131z da \u00f6nemlidir.   Daha detayl\u0131 bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresindeki di\u011fer yaz\u0131lar\u0131ma g\u00f6z atabilirsiniz.<\/p>\n<p>Ayr\u0131ca,  TypeScript&#8217;in resmi d\u00f6k\u00fcmanlar\u0131n\u0131 inceleyerek daha fazla bilgi edinebilirsiniz.  <a href=\"https:\/\/www.typescriptlang.org\/\">TypeScript Resmi Dok\u00fcmanlar\u0131<\/a><\/p>\n<p>Umar\u0131m bu makale, TypeScript ile tip g\u00fcvenli\u011fini sa\u011flaman\u0131za yard\u0131mc\u0131 olur.  Sorular\u0131n\u0131z veya \u00f6nerileriniz i\u00e7in l\u00fctfen yorum b\u0131rak\u0131n.<\/p>\n<p>#Etiketler: TypeScript, fetch, tip g\u00fcvenli\u011fi, tip birle\u015ftirme, ko\u015fullu tipler, API \u00e7a\u011fr\u0131lar\u0131, veri tipleri, programlama, web geli\u015ftirme<\/p>\n","protected":false},"excerpt":{"rendered":"TypeScript ile Tiplerin Biriktirilmesi: T\u00fcm fetch() Sonu\u00e7lar\u0131n\u0131n Tiplenmesi Merhaba, ben Fatih Soysal. Bu yaz\u0131da, TypeScript kullanarak fetch() fonksiyonunun&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-5338","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>TypeScript ile Tiplerin Biriktirilmesi: T\u00fcm fetch() Sonu\u00e7lar\u0131n\u0131n Tiplenmesi<\/title>\n<meta name=\"description\" content=\"Merhaba, ben Fatih Soysal. Bu yaz\u0131da, TypeScript kullanarak `fetch()` fonksiyonunun farkl\u0131 API u\u00e7 noktalar\u0131ndan d\u00f6nd\u00fcrebilece\u011fi \u00e7e\u015fitli veri tiplerini nas\u0131l ele alabilece\u011fimizi, t\u00fcm olas\u0131 sonu\u00e7lar\u0131 kapsayacak \u015fekilde tiplemeyi \u00f6\u011frenece\u011fiz. \u00d6zellikle, birden \u00e7ok API \u00e7a\u011fr\u0131s\u0131 yapt\u0131\u011f\u0131m\u0131z ve her birinin farkl\u0131 bir veri yap\u0131s\u0131 d\u00f6nd\u00fcrd\u00fc\u011f\u00fc senaryolar i\u00e7in pratik \u00e7\u00f6z\u00fcmler sunaca\u011f\u0131m. Bu durum, karma\u015f\u0131k uygulamalar geli\u015ftirme s\u00fcrecinde s\u0131k\u00e7a kar\u015f\u0131la\u015f\u0131lan bir sorundur ve \u00e7\u00f6z\u00fcm\u00fc i\u00e7in etkili y\u00f6ntemler \u00f6\u011frenmek olduk\u00e7a \u00f6nemlidir.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TypeScript ile Tiplerin Biriktirilmesi: T\u00fcm fetch() Sonu\u00e7lar\u0131n\u0131n Tiplenmesi\" \/>\n<meta property=\"og:description\" content=\"Merhaba, ben Fatih Soysal. Bu yaz\u0131da, TypeScript kullanarak `fetch()` fonksiyonunun farkl\u0131 API u\u00e7 noktalar\u0131ndan d\u00f6nd\u00fcrebilece\u011fi \u00e7e\u015fitli veri tiplerini nas\u0131l ele alabilece\u011fimizi, t\u00fcm olas\u0131 sonu\u00e7lar\u0131 kapsayacak \u015fekilde tiplemeyi \u00f6\u011frenece\u011fiz. \u00d6zellikle, birden \u00e7ok API \u00e7a\u011fr\u0131s\u0131 yapt\u0131\u011f\u0131m\u0131z ve her birinin farkl\u0131 bir veri yap\u0131s\u0131 d\u00f6nd\u00fcrd\u00fc\u011f\u00fc senaryolar i\u00e7in pratik \u00e7\u00f6z\u00fcmler sunaca\u011f\u0131m. Bu durum, karma\u015f\u0131k uygulamalar geli\u015ftirme s\u00fcrecinde s\u0131k\u00e7a kar\u015f\u0131la\u015f\u0131lan bir sorundur ve \u00e7\u00f6z\u00fcm\u00fc i\u00e7in etkili y\u00f6ntemler \u00f6\u011frenmek olduk\u00e7a \u00f6nemlidir.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2024-12-01T02:45:13+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"TypeScript ile Tiplerin Biriktirilmesi: T\u00fcm fetch() Sonu\u00e7lar\u0131n\u0131n Tiplenmesi\",\"datePublished\":\"2024-12-01T02:45:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi\/\"},\"wordCount\":689,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi\/#respond\"]}],\"copyrightYear\":\"2024\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/typescript-ile-tiplerin-biriktirilmesi-tum-fetch-sonuclarinin-tiplenmesi\/\",\"name\":\"TypeScript ile Tiplerin Biriktirilmesi: T\u00fcm fetch() Sonu\u00e7lar\u0131n\u0131n Tiplenmesi\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2024-12-01T02:45:13+00:00\",\"description\":\"Merhaba, ben Fatih Soysal. Bu yaz\u0131da, TypeScript kullanarak `fetch()` fonksiyonunun farkl\u0131 API u\u00e7 noktalar\u0131ndan d\u00f6nd\u00fcrebilece\u011fi \u00e7e\u015fitli veri tiplerini nas\u0131l ele alabilece\u011fimizi, t\u00fcm olas\u0131 sonu\u00e7lar\u0131 kapsayacak \u015fekilde tiplemeyi \u00f6\u011frenece\u011fiz. \u00d6zellikle, birden \u00e7ok API \u00e7a\u011fr\u0131s\u0131 yapt\u0131\u011f\u0131m\u0131z ve her birinin farkl\u0131 bir veri yap\u0131s\u0131 d\u00f6nd\u00fcrd\u00fc\u011f\u00fc senaryolar i\u00e7in pratik \u00e7\u00f6z\u00fcmler sunaca\u011f\u0131m. 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