{"id":15393,"date":"2025-03-17T02:00:14","date_gmt":"2025-03-16T23:00:14","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/javascriptte-this-kavrami-detayli-anlatim-2\/"},"modified":"2025-03-17T02:00:14","modified_gmt":"2025-03-16T23:00:14","slug":"javascriptte-this-kavrami-detayli-anlatim-2","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/javascriptte-this-kavrami-detayli-anlatim-2\/","title":{"rendered":"JavaScript&#8217;te &#8216;this&#8217; Kavram\u0131: Detayl\u0131 Anlat\u0131m"},"content":{"rendered":"<p><body><\/p>\n<p>JavaScript&#8217;te &#8216;this&#8217; Kavram\u0131: Detayl\u0131 Anlat\u0131m<\/p>\n<p>JavaScript&#8217;te &#8216;this&#8217; anahtar kelimesi, bir\u00e7ok geli\u015ftirici i\u00e7in kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131 yaratan bir konudur.  Ancak, &#8216;this&#8217;in davran\u0131\u015f\u0131n\u0131 anlamak, JavaScript&#8217;i etkin bir \u015fekilde kullanmak i\u00e7in son derece \u00f6nemlidir. Bu makalede, &#8216;this&#8217;in nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131, farkl\u0131 ba\u011flamlardaki davran\u0131\u015flar\u0131n\u0131 ve yayg\u0131n hatalar\u0131 a\u00e7\u0131klayaca\u011f\u0131z.  \u00d6ncelikle, &#8216;this&#8217;in ne oldu\u011funa dair temel bir anlay\u0131\u015fla ba\u015flayal\u0131m.  K\u0131sacas\u0131, &#8216;this&#8217;  \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131 ba\u011flama g\u00f6re de\u011fi\u015fen bir anahtar kelimedir.<\/p>\n<h2>&#8216;This&#8217;in De\u011fi\u015fken Ba\u011flam\u0131<\/h2>\n<p> &#8216;This&#8217;in de\u011feri, fonksiyonun nas\u0131l \u00e7a\u011fr\u0131ld\u0131\u011f\u0131na ba\u011fl\u0131 olarak de\u011fi\u015fir.  Bu ba\u011flam, fonksiyonun \u00e7a\u011f\u0131r\u0131m bi\u00e7imini tan\u0131mlar.  \u00d6rne\u011fin, bir nesne metodu i\u00e7inde \u00e7a\u011fr\u0131l\u0131rsa, &#8216;this&#8217; o nesneyi i\u015faret eder.  Ancak, bir fonksiyon do\u011frudan \u00e7a\u011fr\u0131l\u0131rsa, &#8216;this&#8217;in de\u011feri genellikle global nesnedir (taray\u0131c\u0131da window, Node.js&#8217;de global).<\/p>\n<p><strong>\u00d6rnek:<\/strong><\/p>\n<pre><code class=\"language-javascript\">\nconst myObject = {\n  name: \"Fatih Soysal\",\n  greet: function() {\n    console.log(\"Merhaba, benim ad\u0131m \" + this.name); \n  }\n};\n\nmyObject.greet(); \/\/ \"Merhaba, benim ad\u0131m Fatih Soysal\" yazd\u0131r\u0131r.\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, greet fonksiyonu myObject nesnesi \u00fczerinde \u00e7a\u011fr\u0131ld\u0131\u011f\u0131 i\u00e7in, &#8216;this&#8217; myObject&#8217;i i\u015faret eder ve this.name do\u011fru \u015fekilde &#8220;Fatih Soysal&#8221; de\u011ferini d\u00f6nd\u00fcr\u00fcr.  Ancak, greet fonksiyonu global olarak \u00e7a\u011fr\u0131l\u0131rsa, sonu\u00e7 farkl\u0131 olacakt\u0131r.<\/p>\n<h2>&#8216;This&#8217;in Farkl\u0131 Kullan\u0131m Alanlar\u0131<\/h2>\n<p> &#8216;This&#8217;in kullan\u0131m\u0131 sadece nesne metodlar\u0131yla s\u0131n\u0131rl\u0131 de\u011fildir.  Ayn\u0131 zamanda, fonksiyonlar\u0131n call, apply ve bind metodlar\u0131yla da kontrol edilebilir.  Bu metodlar, &#8216;this&#8217;in ba\u011flam\u0131n\u0131 a\u00e7\u0131k\u00e7a belirtmemizi sa\u011flar.  Bu \u00f6zellikle, fonksiyonlar\u0131 farkl\u0131 ba\u011flamlarda kullan\u0131rken \u00e7ok faydal\u0131d\u0131r.<\/p>\n<p><strong>call metodu:<\/strong>  call metodu, fonksiyona arg\u00fcmanlar olarak de\u011ferler ve bir &#8216;this&#8217; ba\u011flam\u0131 sa\u011flar.<\/p>\n<p><strong>apply metodu:<\/strong>  apply metodu, call metoduna benzer \u015fekilde \u00e7al\u0131\u015f\u0131r, ancak arg\u00fcmanlar\u0131 bir dizi olarak al\u0131r.<\/p>\n<p><strong>bind metodu:<\/strong>  bind metodu, fonksiyonun &#8216;this&#8217; ba\u011flam\u0131n\u0131 kal\u0131c\u0131 olarak belirler, b\u00f6ylece fonksiyon daha sonra farkl\u0131 bir ba\u011flamda \u00e7a\u011fr\u0131l\u0131rsa bile &#8216;this&#8217; de\u011feri de\u011fi\u015fmez.<\/p>\n<p>Ayr\u0131ca, ok fonksiyonlar\u0131 (arrow functions) &#8216;this&#8217; ba\u011flam\u0131n\u0131 leksikal olarak (\u00e7evresinden) devral\u0131r. Bu, ok fonksiyonlar\u0131 i\u00e7inde &#8216;this&#8217;in d\u0131\u015f kapsamdaki de\u011ferini kullanmas\u0131 anlam\u0131na gelir.<\/p>\n<h2>Yayg\u0131n Hatalar ve \u00c7\u00f6z\u00fcmleri<\/h2>\n<p> &#8216;This&#8217; ile ilgili en yayg\u0131n hatalardan biri, fonksiyonlar\u0131n beklenmedik bir &#8216;this&#8217; ba\u011flam\u0131nda \u00e7al\u0131\u015fmas\u0131d\u0131r.  Bu, \u00f6zellikle geri \u00e7a\u011f\u0131r\u0131m fonksiyonlar\u0131 (callback functions) kullan\u0131rken s\u0131k\u00e7a kar\u015f\u0131la\u015f\u0131lan bir durumdur.  Bu gibi durumlarda, bind metodu veya ok fonksiyonlar\u0131 kullan\u0131larak &#8216;this&#8217; ba\u011flam\u0131 d\u00fczeltilebilir.<\/p>\n<p>Bir di\u011fer hata ise, &#8216;this&#8217;in de\u011ferini yanl\u0131\u015f anlamaktan kaynaklan\u0131r.  Her zaman fonksiyonun \u00e7a\u011fr\u0131ld\u0131\u011f\u0131 ba\u011flam\u0131 kontrol etmek \u00f6nemlidir.  Bu konuyu daha iyi anlamak i\u00e7in,  <a href=\"https:\/\/dev.to\/jbz\/this-1cch\">bu \u0130ngilizce makaleye<\/a> g\u00f6z atabilirsiniz. Bu makale, &#8216;this&#8217;in karma\u015f\u0131kl\u0131\u011f\u0131n\u0131 daha detayl\u0131 bir \u015fekilde a\u00e7\u0131klamaktad\u0131r.  Ayr\u0131ca, JavaScript \u00f6\u011freniminizde size yard\u0131mc\u0131 olacak daha fazla kaynak i\u00e7in kendi web sitemi <a href=\"https:\/\/fatihsoysal.com\">Fatih Soysal<\/a>&#8216;\u0131 ziyaret edebilirsiniz.<\/p>\n<p>Sonu\u00e7 olarak, JavaScript&#8217;te &#8216;this&#8217; anahtar kelimesi g\u00fc\u00e7l\u00fc ve esnek bir ara\u00e7t\u0131r, ancak do\u011fru anla\u015f\u0131lmas\u0131 ve kullan\u0131lmas\u0131 \u00f6nemlidir.  Bu makalede ele ald\u0131\u011f\u0131m\u0131z bilgiler, &#8216;this&#8217;i daha iyi anlaman\u0131za ve kullanman\u0131za yard\u0131mc\u0131 olacakt\u0131r.  Unutmay\u0131n ki, uygulama ve deneyim &#8216;this&#8217; kavram\u0131n\u0131 tam olarak kavraman\u0131z\u0131 sa\u011flayacakt\u0131r.<\/p>\n<p> #Etiketler: javascript, this, ba\u011flam, scope, prototip, fonksiyon, nesne, programlama, web geli\u015ftirme, call, apply, bind, ok fonksiyonu, arrow function, callback, geri \u00e7a\u011f\u0131r\u0131m <\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"JavaScript&#8217;te &#8216;this&#8217; Kavram\u0131: Detayl\u0131 Anlat\u0131m JavaScript&#8217;te &#8216;this&#8217; anahtar kelimesi, bir\u00e7ok geli\u015ftirici i\u00e7in kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131 yaratan bir konudur. Ancak,&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-15393","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>JavaScript&#039;te &#039;this&#039; Kavram\u0131: Detayl\u0131 Anlat\u0131m<\/title>\n<meta name=\"description\" content=\"JavaScript&#039;te &#039;this&#039; anahtar kelimesi, bir\u00e7ok geli\u015ftirici i\u00e7in kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131 yaratan bir konudur. Ancak, &#039;this&#039;in davran\u0131\u015f\u0131n\u0131 anlamak, JavaScript&#039;i etkin bir \u015fekilde kullanmak i\u00e7in son derece \u00f6nemlidir. Bu makalede, &#039;this&#039;in nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131, farkl\u0131 ba\u011flamlardaki davran\u0131\u015flar\u0131n\u0131 ve yayg\u0131n hatalar\u0131 a\u00e7\u0131klayaca\u011f\u0131z. \u00d6ncelikle, &#039;this&#039;in ne oldu\u011funa dair temel bir anlay\u0131\u015fla ba\u015flayal\u0131m. 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Bu makalede, &#039;this&#039;in nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131, farkl\u0131 ba\u011flamlardaki davran\u0131\u015flar\u0131n\u0131 ve yayg\u0131n hatalar\u0131 a\u00e7\u0131klayaca\u011f\u0131z. \u00d6ncelikle, &#039;this&#039;in ne oldu\u011funa dair temel bir anlay\u0131\u015fla ba\u015flayal\u0131m. K\u0131sacas\u0131, &#039;this&#039; \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131 ba\u011flama g\u00f6re de\u011fi\u015fen bir anahtar kelimedir.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/javascriptte-this-kavrami-detayli-anlatim-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-03-16T23:00:14+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=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-this-kavrami-detayli-anlatim-2\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-this-kavrami-detayli-anlatim-2\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"JavaScript&#8217;te &#8216;this&#8217; Kavram\u0131: Detayl\u0131 Anlat\u0131m\",\"datePublished\":\"2025-03-16T23:00:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-this-kavrami-detayli-anlatim-2\/\"},\"wordCount\":594,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/javascriptte-this-kavrami-detayli-anlatim-2\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-this-kavrami-detayli-anlatim-2\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-this-kavrami-detayli-anlatim-2\/\",\"name\":\"JavaScript'te 'this' Kavram\u0131: Detayl\u0131 Anlat\u0131m\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-03-16T23:00:14+00:00\",\"description\":\"JavaScript'te 'this' anahtar kelimesi, bir\u00e7ok geli\u015ftirici i\u00e7in kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131 yaratan bir konudur. 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K\u0131sacas\u0131, 'this' \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131 ba\u011flama g\u00f6re de\u011fi\u015fen bir anahtar kelimedir.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/fatihsoysal.com\/blog\/javascriptte-this-kavrami-detayli-anlatim-2\/","og_locale":"tr_TR","og_type":"article","og_title":"JavaScript'te 'this' Kavram\u0131: Detayl\u0131 Anlat\u0131m","og_description":"JavaScript'te 'this' anahtar kelimesi, bir\u00e7ok geli\u015ftirici i\u00e7in kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131 yaratan bir konudur. Ancak, 'this'in davran\u0131\u015f\u0131n\u0131 anlamak, JavaScript'i etkin bir \u015fekilde kullanmak i\u00e7in son derece \u00f6nemlidir. 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