{"id":30976,"date":"2025-10-04T06:41:25","date_gmt":"2025-10-04T03:41:25","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/?p=30976"},"modified":"2025-10-04T06:41:25","modified_gmt":"2025-10-04T03:41:25","slug":"angular-uygulamalarinda-modul-on-yuklemesi-preloading-performans-optimizasyonunun-anahtari","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/angular-uygulamalarinda-modul-on-yuklemesi-preloading-performans-optimizasyonunun-anahtari\/","title":{"rendered":"Angular Uygulamalar\u0131nda Mod\u00fcl \u00d6n Y\u00fcklemesi (Preloading): Performans Optimizasyonunun Anahtar\u0131"},"content":{"rendered":"

<\/p>\n

Angular Uygulamalar\u0131nda Mod\u00fcl \u00d6n Y\u00fcklemesi (Preloading): Performans Optimizasyonunun Anahtar\u0131<\/h2>\n

Giri\u015f: Angular Uygulamalar\u0131nda Performans\u0131n \u00d6nemi ve Lazy Loading<\/h3>\n

Modern web uygulamalar\u0131, kullan\u0131c\u0131lara zengin ve etkile\u015fimli deneyimler sunmak i\u00e7in giderek daha karma\u015f\u0131k hale gelmektedir. Tek Sayfa Uygulamalar\u0131 (SPA’lar) mimarisiyle geli\u015ftirilen Angular uygulamalar\u0131 da bu karma\u015f\u0131kl\u0131\u011f\u0131n bir par\u00e7as\u0131d\u0131r. Kullan\u0131c\u0131lar\u0131n beklentileri de ayn\u0131 oranda artmakta; uygulamalar\u0131n h\u0131zl\u0131 y\u00fcklenmesi, ak\u0131c\u0131 \u00e7al\u0131\u015fmas\u0131 ve an\u0131nda tepki vermesi bir standart haline gelmi\u015ftir. Yava\u015f y\u00fcklenen veya gecikmelerle dolu bir uygulama, kullan\u0131c\u0131 deneyimini olumsuz etkiler, kullan\u0131c\u0131 kayb\u0131na yol a\u00e7ar ve hatta uygulaman\u0131n genel ba\u015far\u0131s\u0131n\u0131 tehlikeye atabilir. Bu nedenle, performans optimizasyonu, Angular geli\u015ftirme s\u00fcrecinin ayr\u0131lmaz bir par\u00e7as\u0131d\u0131r.<\/p>\n

Angular uygulamalar\u0131nda performans optimizasyonunun temel ta\u015flar\u0131ndan biri, uygulaman\u0131n ilk y\u00fckleme s\u00fcresini minimize etmektir. Geleneksel olarak, bir SPA’n\u0131n t\u00fcm kodu ve kaynaklar\u0131 ilk istekte taray\u0131c\u0131ya g\u00f6nderilir. Uygulama b\u00fcy\u00fcd\u00fck\u00e7e, bu ilk paket (bundle) boyutu da artar ve y\u00fckleme s\u00fcresi uzar. Bu sorunu \u00e7\u00f6zmek i\u00e7in Angular, “Lazy Loading” (Tembel Y\u00fckleme) ad\u0131 verilen bir teknik sunar. Lazy loading, uygulaman\u0131n belirli b\u00f6l\u00fcmlerinin (mod\u00fcllerinin) yaln\u0131zca kullan\u0131c\u0131 o b\u00f6l\u00fcme ihtiya\u00e7 duydu\u011funda y\u00fcklenmesini sa\u011flayarak, ilk y\u00fckleme paketinin boyutunu \u00f6nemli \u00f6l\u00e7\u00fcde k\u00fc\u00e7\u00fclt\u00fcr. Bu sayede, uygulaman\u0131n ba\u015flang\u0131\u00e7 s\u00fcresi k\u0131sal\u0131r ve kullan\u0131c\u0131lar daha h\u0131zl\u0131 bir \u015fekilde etkile\u015fim kurmaya ba\u015flayabilirler.<\/p>\n

Ancak lazy loading’in de kendi i\u00e7inde bir dezavantaj\u0131 vard\u0131r: Bir mod\u00fcl, ancak kullan\u0131c\u0131 o mod\u00fcl\u00fcn rotas\u0131na gitti\u011finde y\u00fcklenir. Bu, kullan\u0131c\u0131n\u0131n navigasyon yaparken k\u0131sa bir y\u00fckleme gecikmesiyle kar\u015f\u0131la\u015fabilece\u011fi anlam\u0131na gelir. \u00d6zellikle k\u00f6t\u00fc a\u011f ko\u015fullar\u0131nda veya b\u00fcy\u00fck mod\u00fcller s\u00f6z konusu oldu\u011funda, bu gecikme kullan\u0131c\u0131 deneyimini olumsuz etkileyebilir. \u0130\u015fte tam bu noktada “Preloading” (\u00d6n Y\u00fckleme) devreye girer. Preloading, lazy loading’in getirdi\u011fi bu gecikmeyi ortadan kald\u0131rmay\u0131 ama\u00e7layan bir performans optimizasyon tekni\u011fidir.<\/p>\n

Lazy Loading’in Temelleri ve Avantajlar\u0131<\/h3>\n

Lazy loading, Angular’da loadChildren<\/code> \u00f6zelli\u011fi kullan\u0131larak yap\u0131land\u0131r\u0131l\u0131r. Bir mod\u00fcl\u00fcn loadChildren<\/code> ile tan\u0131mlanmas\u0131, o mod\u00fcl\u00fcn ba\u015flang\u0131\u00e7ta uygulaman\u0131n ana paketine dahil edilmemesini sa\u011flar. Bunun yerine, Angular Router, ilgili rota etkinle\u015ftirildi\u011finde mod\u00fcl\u00fc dinamik olarak y\u00fckler.<\/p>\n

\/\/ app-routing.module.ts\nimport { NgModule } from '@angular\/core';\nimport { RouterModule, Routes } from '@angular\/router';\n\nconst routes: Routes = [\n  { path: 'home', component: HomeComponent },\n  {\n    path: 'admin',\n    loadChildren: () => import('.\/admin\/admin.module').then(m => m.AdminModule)\n  },\n  {\n    path: 'products',\n    loadChildren: () => import('.\/products\/products.module').then(m => m.ProductsModule)\n  },\n  { path: '', redirectTo: '\/home', pathMatch: 'full' }\n];\n\n@NgModule({\n  imports: [RouterModule.forRoot(routes)],\n  exports: [RouterModule]\n})\nexport class AppRoutingModule { }<\/code><\/pre>\n
Yukar\u0131daki \u00f6rnekte, AdminModule<\/code> ve ProductsModule<\/code> lazy loading ile y\u00fcklenir. Kullan\u0131c\u0131 \/admin<\/code> veya \/products<\/code> rotalar\u0131na gitmedik\u00e7e bu mod\u00fcllerin kodu taray\u0131c\u0131ya indirilmez.<\/p>\n
Lazy loading’in ba\u015fl\u0131ca avantajlar\u0131 \u015funlard\u0131r:
\n*   Daha K\u00fc\u00e7\u00fck \u0130lk Paket Boyutu:<\/strong> Uygulaman\u0131n ba\u015flang\u0131\u00e7ta indirmesi gereken JavaScript kodu miktar\u0131 azal\u0131r.
\n*   Daha H\u0131zl\u0131 Uygulama Ba\u015flang\u0131c\u0131:<\/strong> Taray\u0131c\u0131n\u0131n daha az kodu ayr\u0131\u015ft\u0131rmas\u0131 ve \u00e7al\u0131\u015ft\u0131rmas\u0131 gerekti\u011finden, uygulaman\u0131n ilk etkile\u015fimli olma s\u00fcresi (Time To Interactive) k\u0131sal\u0131r.
\n*   Geli\u015fmi\u015f Kaynak Y\u00f6netimi:<\/strong> Yaln\u0131zca ihtiya\u00e7 duyulan mod\u00fcller y\u00fcklendi\u011fi i\u00e7in, taray\u0131c\u0131 belle\u011fi daha verimli kullan\u0131l\u0131r.<\/p>\n
Ancak, lazy loading’in getirdi\u011fi “talep \u00fczerine y\u00fckleme” modeli, kullan\u0131c\u0131n\u0131n bir rotaya her gitti\u011finde k\u0131sa bir gecikmeyle kar\u015f\u0131la\u015fmas\u0131na neden olabilir. Bu gecikme, kullan\u0131c\u0131n\u0131n mod\u00fcl\u00fcn i\u00e7eri\u011fini g\u00f6rmeden \u00f6nce beklemesi gerekti\u011fi anlam\u0131na gelir.<\/p>\n
Preloading Nedir ve Neden \u0130htiya\u00e7 Duyar\u0131z?<\/h3>\n
Preloading, lazy loading’in bu dezavantaj\u0131n\u0131 gidermek i\u00e7in geli\u015ftirilmi\u015f bir tekniktir. Temel amac\u0131, uygulaman\u0131n ilk y\u00fcklemesini tamamlad\u0131ktan ve ana mod\u00fclleri indirdikten sonra, kullan\u0131c\u0131n\u0131n hen\u00fcz talep etmedi\u011fi ancak yak\u0131n gelecekte talep etme olas\u0131l\u0131\u011f\u0131 y\u00fcksek olan lazy y\u00fcklenmi\u015f mod\u00fclleri arka planda (genellikle bir web worker veya bo\u015fta kalan bir taray\u0131c\u0131 i\u015f par\u00e7ac\u0131\u011f\u0131 kullanarak) indirmektir. Bu sayede, kullan\u0131c\u0131 ilgili rotaya navigasyon yapt\u0131\u011f\u0131nda, mod\u00fcl zaten indirilmi\u015f ve kullan\u0131ma haz\u0131r oldu\u011fu i\u00e7in herhangi bir gecikme ya\u015famaz.<\/p>\n
Preloading’e neden ihtiya\u00e7 duyar\u0131z sorusunun cevab\u0131, kullan\u0131c\u0131 deneyimi ve performans beklentileriyle do\u011frudan ili\u015fkilidir:
\n*   Ak\u0131c\u0131 Navigasyon:<\/strong> Kullan\u0131c\u0131lar\u0131n bir sayfadan di\u011ferine ge\u00e7erken bekleme s\u00fcrelerini ortadan kald\u0131rarak veya minimize ederek daha ak\u0131c\u0131 ve kesintisiz bir deneyim sunar.
\n*   Alg\u0131lanan Performans \u0130yile\u015fmesi:<\/strong> Uygulama asl\u0131nda daha h\u0131zl\u0131 y\u00fcklenmese bile, kullan\u0131c\u0131lar navigasyonun daha h\u0131zl\u0131 oldu\u011funu alg\u0131lar, bu da genel memnuniyeti art\u0131r\u0131r.
\n*   Kullan\u0131c\u0131 Kayb\u0131n\u0131 Azaltma:<\/strong> \u00d6zellikle kritik i\u015f ak\u0131\u015flar\u0131nda, yava\u015f navigasyon kullan\u0131c\u0131lar\u0131n uygulamay\u0131 terk etmesine neden olabilir. Preloading bu riski azalt\u0131r.
\n*   SEO \u0130yile\u015ftirmeleri (Dolayl\u0131):<\/strong> Daha h\u0131zl\u0131 y\u00fcklenen ve daha ak\u0131c\u0131 navigasyon sunan sayfalar, arama motorlar\u0131 taraf\u0131ndan daha iyi de\u011ferlendirilebilir.<\/p>\n
\u00d6zetle, preloading, lazy loading’in sa\u011flad\u0131\u011f\u0131 ilk y\u00fckleme avantajlar\u0131n\u0131 korurken, navigasyon s\u0131ras\u0131ndaki gecikmeleri ortadan kald\u0131rarak veya \u00f6nemli \u00f6l\u00e7\u00fcde azaltarak uygulaman\u0131n genel performans\u0131n\u0131 ve kullan\u0131c\u0131 deneyimini iyile\u015ftiren stratejik bir optimizasyon tekni\u011fidir.<\/p>\n
Angular’da Preloading Stratejileri<\/h3>\n
Angular Router, mod\u00fcl \u00f6n y\u00fcklemesini y\u00f6netmek i\u00e7in \u00e7e\u015fitli yerle\u015fik stratejiler sunar ve ayn\u0131 zamanda geli\u015ftiricilerin kendi \u00f6zel stratejilerini olu\u015fturmalar\u0131na olanak tan\u0131r. Preloading stratejisi, RouterModule.forRoot()<\/code> metodunda ikinci bir arg\u00fcman olarak preloadingStrategy<\/code> \u00f6zelli\u011fi arac\u0131l\u0131\u011f\u0131yla belirtilir.<\/p>\n
NoPreloading (Varsay\u0131lan)<\/h4>\n
NoPreloading<\/code>, Angular’daki varsay\u0131lan \u00f6n y\u00fckleme stratejisidir. Bu strateji se\u00e7ildi\u011finde (veya herhangi bir strateji belirtilmedi\u011finde), lazy y\u00fcklenmi\u015f mod\u00fcller \u00f6nceden y\u00fcklenmez. Mod\u00fcller yaln\u0131zca kullan\u0131c\u0131 ilgili rotaya navigasyon yapt\u0131\u011f\u0131nda talep \u00fczerine y\u00fcklenir. Bu, en az kaynak t\u00fcketen ancak navigasyon s\u0131ras\u0131nda potansiyel gecikmelere neden olabilen yakla\u015f\u0131md\u0131r.<\/p>\n
\/\/ app-routing.module.ts\nimport { NgModule } from '@angular\/core';\nimport { RouterModule, Routes, NoPreloading } from '@angular\/router';\n\nconst routes: Routes = [\n  \/\/ ... lazy loaded routes\n];\n\n@NgModule({\n  imports: [RouterModule.forRoot(routes, { preloadingStrategy: NoPreloading })],\n  exports: [RouterModule]\n})\nexport class AppRoutingModule { }<\/code><\/pre>\n
NoPreloading<\/code>‘i a\u00e7\u0131k\u00e7a belirtmek genellikle gereksizdir, \u00e7\u00fcnk\u00fc bu varsay\u0131lan davran\u0131\u015ft\u0131r.<\/p>\n
PreloadAllModules<\/h4>\n
PreloadAllModules<\/code> stratejisi, uygulaman\u0131n ilk y\u00fcklemesini tamamlad\u0131ktan ve ana mod\u00fcllerini indirdikten hemen sonra, t\u00fcm lazy y\u00fcklenmi\u015f mod\u00fclleri arka planda otomatik olarak y\u00fckler. Bu, uygulamadaki t\u00fcm lazy mod\u00fcllerin, kullan\u0131c\u0131 hen\u00fcz onlar\u0131 talep etmeden \u00f6nce haz\u0131r olmas\u0131n\u0131 sa\u011flar.<\/p>\n
Avantajlar\u0131:<\/strong>
\n*   Kolay Kurulum:<\/strong> Uygulamadaki t\u00fcm lazy mod\u00fcller i\u00e7in otomatik olarak \u00e7al\u0131\u015f\u0131r, ek yap\u0131land\u0131rma gerektirmez.
\n*   H\u0131zl\u0131 Navigasyon:<\/strong> T\u00fcm mod\u00fcller \u00f6nceden y\u00fcklendi\u011fi i\u00e7in, kullan\u0131c\u0131 herhangi bir lazy rotaya gitti\u011finde neredeyse an\u0131nda y\u00fckleme ger\u00e7ekle\u015fir.<\/p>\n
Dezavantajlar\u0131:<\/strong>
\n*   Gereksiz Veri T\u00fcketimi:<\/strong> Kullan\u0131c\u0131n\u0131n uygulaman\u0131n t\u00fcm b\u00f6l\u00fcmlerini ziyaret etme ihtimali d\u00fc\u015f\u00fckse, kullan\u0131lmayacak mod\u00fcller i\u00e7in bant geni\u015fli\u011fi ve kaynaklar bo\u015fa harcan\u0131r.
\n*   Potansiyel Performans Sorunlar\u0131:<\/strong> \u00c7ok say\u0131da veya \u00e7ok b\u00fcy\u00fck lazy mod\u00fcl varsa, bunlar\u0131n hepsinin arka planda y\u00fcklenmesi taray\u0131c\u0131y\u0131 yava\u015flatabilir veya di\u011fer kritik i\u015flemler i\u00e7in kaynaklar\u0131 t\u00fcketebilir. \u00d6zellikle mobil cihazlarda veya k\u00f6t\u00fc a\u011f ko\u015fullar\u0131nda sorun yaratabilir.<\/p>\n
\/\/ app-routing.module.ts\nimport { NgModule } from '@angular\/core';\nimport { RouterModule, Routes, PreloadAllModules } from '@angular\/router';\n\nconst routes: Routes = [\n  \/\/ ... lazy loaded routes\n];\n\n@NgModule({\n  imports: [RouterModule.forRoot(routes, { preloadingStrategy: PreloadAllModules })],\n  exports: [RouterModule]\n})\nexport class AppRoutingModule { }<\/code><\/pre>\n
Bu strateji, genellikle k\u00fc\u00e7\u00fck ve orta \u00f6l\u00e7ekli uygulamalar veya kullan\u0131c\u0131lar\u0131n uygulaman\u0131n b\u00fcy\u00fck bir k\u0131sm\u0131n\u0131 ziyaret etmesinin beklendi\u011fi durumlar i\u00e7in uygundur.<\/p>\n
Custom Preloading Strategy (\u00d6zel \u00d6n Y\u00fckleme Stratejisi)<\/h4>\n
Angular, geli\u015ftiricilere kendi \u00f6zel \u00f6n y\u00fckleme stratejilerini olu\u015fturma esnekli\u011fi sunar. Bu, hangi mod\u00fcllerin ne zaman ve hangi ko\u015fullar alt\u0131nda \u00f6nceden y\u00fcklenece\u011fi \u00fczerinde tam kontrol sahibi olman\u0131z\u0131 sa\u011flar. Bu, en g\u00fc\u00e7l\u00fc ve en esnek yakla\u015f\u0131md\u0131r.<\/p>\n
PreloadingStrategy<\/code> Aray\u00fcz\u00fc<\/h5>\n
\u00d6zel bir \u00f6n y\u00fckleme stratejisi olu\u015fturmak i\u00e7in, PreloadingStrategy<\/code> aray\u00fcz\u00fcn\u00fc uygulayan bir s\u0131n\u0131f yazman\u0131z gerekir. Bu aray\u00fcz, tek bir metot olan preload(route: Route, fn: () => Observable): Observable<\/code> metodunu tan\u0131mlar.<\/p>\n
*   route<\/code>: \u00d6n y\u00fcklemesi d\u00fc\u015f\u00fcn\u00fclen lazy y\u00fcklenmi\u015f mod\u00fcl\u00fcn rota yap\u0131land\u0131rmas\u0131n\u0131 i\u00e7erir. Bu nesne, rotan\u0131n data<\/code> \u00f6zelli\u011fini kontrol ederek \u00f6zel kurallar uygulamak i\u00e7in kullan\u0131labilir.
\n*   fn<\/code>: Mod\u00fcl\u00fc ger\u00e7ekten y\u00fckleyen bir fonksiyondur. Bu fonksiyon \u00e7a\u011fr\u0131ld\u0131\u011f\u0131nda, bir Observable<\/code> d\u00f6ner. E\u011fer mod\u00fcl y\u00fcklenmesini istiyorsan\u0131z bu fonksiyonu \u00e7a\u011f\u0131rmal\u0131, istemiyorsan\u0131z EMPTY<\/code> (RxJS’ten) veya of(null)<\/code> gibi bir bo\u015f Observable d\u00f6nd\u00fcrmelisiniz.<\/p>\n
\u00d6zel Strateji Olu\u015fturma Ad\u0131mlar\u0131<\/h5>\n
1.  Bir S\u0131n\u0131f Tan\u0131mlama:<\/strong> PreloadingStrategy<\/code> aray\u00fcz\u00fcn\u00fc uygulayan bir TypeScript s\u0131n\u0131f\u0131 olu\u015fturun.
\n2.  preload<\/code> Metodunu Uygulama:<\/strong> preload<\/code> metodunun i\u00e7ine, hangi mod\u00fcl\u00fcn \u00f6nceden y\u00fcklenece\u011fine karar veren mant\u0131\u011f\u0131 yaz\u0131n.
\n3.  Sa\u011flay\u0131c\u0131 Olarak Kaydetme:<\/strong> Olu\u015fturdu\u011funuz strateji s\u0131n\u0131f\u0131n\u0131 Angular mod\u00fcl\u00fcn\u00fczde (genellikle AppModule<\/code>) bir sa\u011flay\u0131c\u0131 olarak kaydedin.
\n4.  Router’a Tan\u0131mlama:<\/strong> RouterModule.forRoot()<\/code> metodunda preloadingStrategy<\/code> olarak \u00f6zel stratejinizi belirtin.<\/p>\n
A\u015fa\u011f\u0131da farkl\u0131 \u00f6zel strateji \u00f6rnekleri verilmi\u015ftir:<\/p>\n
NetworkAwarePreloadingStrategy<\/code> \u00d6rne\u011fi (A\u011f Durumuna Duyarl\u0131)<\/h5>\n
Bu strateji, kullan\u0131c\u0131n\u0131n a\u011f ba\u011flant\u0131 h\u0131z\u0131na g\u00f6re mod\u00fclleri \u00f6nceden y\u00fcklemeye karar verir. \u00d6rne\u011fin, h\u0131zl\u0131 bir a\u011f ba\u011flant\u0131s\u0131 varsa t\u00fcm mod\u00fclleri \u00f6nceden y\u00fcklerken, yava\u015f bir ba\u011flant\u0131da hi\u00e7bir \u015feyi \u00f6nceden y\u00fcklemeyebilir veya sadece kritik mod\u00fclleri y\u00fckleyebilir.<\/p>\n
\/\/ network-aware-preloading.strategy.ts\nimport { PreloadingStrategy, Route } from '@angular\/router';\nimport { Observable, of, EMPTY } from 'rxjs';\nimport { Injectable } from '@angular\/core';\n\n@Injectable({ providedIn: 'root' })\nexport class NetworkAwarePreloadingStrategy implements PreloadingStrategy {\n  preload(route: Route, fn: () => Observable): Observable {\n    if (route.data && route.data['preload']) {\n      \/\/ Check network connection type\n      const connection = (navigator as any).connection;\n      if (connection && (connection.effectiveType === '4g' || connection.effectiveType === '3g')) {\n        console.log(Preloading ${route.path} module due to fast network.<\/code>);\n        return fn(); \/\/ Preload if network is fast enough\n      } else {\n        console.log(Not preloading ${route.path} module due to slow network.<\/code>);\n        return EMPTY; \/\/ Do not preload if network is slow\n      }\n    }\n    return EMPTY; \/\/ Do not preload if 'preload' data is not set\n  }\n}\n\n\/\/ app-routing.module.ts\nimport { NetworkAwarePreloadingStrategy } from '.\/network-aware-preloading.strategy';\n\nconst routes: Routes = [\n  { path: 'home', component: HomeComponent },\n  {\n    path: 'admin',\n    loadChildren: () => import('.\/admin\/admin.module').then(m => m.AdminModule),\n    data: { preload: true } \/\/ Mark this module for potential preloading\n  },\n  {\n    path: 'products',\n    loadChildren: () => import('.\/products\/products.module').then(m => m.ProductsModule),\n    data: { preload: true } \/\/ Mark this module for potential preloading\n  },\n  \/\/ ... other routes\n];\n\n@NgModule({\n  imports: [RouterModule.forRoot(routes, { preloadingStrategy: NetworkAwarePreloadingStrategy })],\n  exports: [RouterModule]\n})\nexport class AppRoutingModule { }<\/code><\/pre>\n
Bu \u00f6rnekte, navigator.connection<\/code> API’si kullan\u0131larak a\u011f t\u00fcr\u00fc kontrol edilir. effectiveType<\/code> \u00f6zelli\u011fi, a\u011f\u0131n genel h\u0131z\u0131n\u0131 g\u00f6sterir. Sadece data: { preload: true }<\/code> olarak i\u015faretlenmi\u015f rotalar i\u00e7in bu kontrol yap\u0131l\u0131r.<\/p>\n
OnDemandPreloadingStrategy<\/code> \u00d6rne\u011fi (Kullan\u0131c\u0131 Etkile\u015fimine Dayal\u0131)<\/h5>\n
Bu strateji, kullan\u0131c\u0131n\u0131n belirli bir eylemi (\u00f6rne\u011fin bir ba\u011flant\u0131n\u0131n \u00fczerine gelmesi veya bir d\u00fc\u011fmeye t\u0131klamas\u0131) ger\u00e7ekle\u015ftirmesi \u00fczerine mod\u00fclleri \u00f6nceden y\u00fckler. Bu, sadece kullan\u0131c\u0131n\u0131n potansiyel olarak ilgilendi\u011fi mod\u00fcllerin y\u00fcklenmesini sa\u011flar.<\/p>\n
\/\/ on-demand-preloading.strategy.ts\nimport { PreloadingStrategy, Route } from '@angular\/router';\nimport { Observable, EMPTY, Subject } from 'rxjs';\nimport { Injectable } from '@angular\/core';\n\nexport interface PreloadingOptions {\n  routePath: string;\n  preload: boolean;\n}\n\n@Injectable({ providedIn: 'root' })\nexport class OnDemandPreloadingStrategy implements PreloadingStrategy {\n  private preloadOnDemand = new Subject();\n\n  constructor() {\n    this.preloadOnDemand.subscribe((options: PreloadingOptions) => {\n      if (options.preload) {\n        console.log(Preload request for ${options.routePath}<\/code>);\n        \/\/ Here you might trigger the preload for a specific route\n        \/\/ This example focuses on the strategy's decision making based on the 'preloadOnDemand' stream\n      }\n    });\n  }\n\n  preload(route: Route, fn: () => Observable): Observable {\n    if (route.data && route.data['preload']) {\n      \/\/ Listen to the stream for a preload request for this specific route\n      return this.preloadOnDemand.asObservable().pipe(\n        \/\/ Filter for requests specific to this route and where preload is true\n        \/\/ In a real scenario, you'd match routePath with route.path or some identifier\n        \/\/ For simplicity, this example just checks if any preload request comes through and matches the 'preload' data flag\n        \/\/ A more robust implementation would match route.path<\/code> with options.routePath<\/code>\n        \/\/ For now, let's assume data['preload']<\/code> means it's eligible, and we'd trigger it externally.\n        \/\/ This is a simplified example; a full implementation would need more logic to map requests to specific routes.\n        \/\/ The most direct way to implement \"on demand\" is to call fn()<\/code> directly when the event happens.\n        \/\/ However, the PreloadingStrategy<\/code> interface calls preload<\/code> for all<\/em> lazy routes initially.\n        \/\/ So, the preload<\/code> method must decide now<\/em> whether to preload or defer.\n        \/\/ A common pattern for \"on demand\" is to return EMPTY initially and then have an external service trigger fn()<\/code>\n        \/\/ when the demand occurs. But PreloadingStrategy<\/code> is only called once per route.\n\n        \/\/ A more practical approach for on-demand within the strategy itself:\n        \/\/ We could expose a method to trigger preloading for a specific route path.\n        \/\/ Let's modify the strategy to use a Map for pending preloads.\n      );\n    }\n    return EMPTY;\n  }\n\n  \/\/ A method to be called externally, e.g., from a component on mouseenter\n  startPreload(routePath: string): void {\n    this.preloadOnDemand.next({ routePath, preload: true });\n  }\n}\n\n\/\/ Revised OnDemandPreloadingStrategy for actual use:\n\/\/ on-demand-preloading.strategy.ts\nimport { PreloadingStrategy, Route } from '@angular\/router';\nimport { Observable, of, EMPTY, Subject } from 'rxjs';\nimport { Injectable } from '@angular\/core';\nimport { switchMap } from 'rxjs\/operators';\n\n@Injectable({ providedIn: 'root' })\nexport class OnDemandPreloadingStrategy implements PreloadingStrategy {\n  private preloadOnDemandSource = new Subject<{ routePath: string, preload: boolean }>();\n  public preloadOnDemand$ = this.preloadOnDemandSource.asObservable();\n\n  preload(route: Route, fn: () => Observable): Observable {\n    \/\/ Check if this route is marked for on-demand preloading\n    if (route.data && route.data['preloadOnDemand']) {\n      return this.preloadOnDemand$.pipe(\n        switchMap(preloadRequest => {\n          if (preloadRequest.preload && preloadRequest.routePath === route.path) {\n            console.log(Preloading ${route.path} module on demand.<\/code>);\n            return fn(); \/\/ Trigger preload\n          }\n          return EMPTY; \/\/ Do not preload\n        })\n      );\n    }\n    return EMPTY; \/\/ Not marked for on-demand preloading\n  }\n\n  startPreload(routePath: string): void {\n    this.preloadOnDemandSource.next({ routePath, preload: true });\n  }\n}\n\n\/\/ Example usage in a component (e.g., a navigation link)\n\/\/ some-component.ts\nimport { Component } from '@angular\/core';\nimport { OnDemandPreloadingStrategy } from '.\/on-demand-preloading.strategy';\n\n@Component({\n  selector: 'app-some-component',\n  template: \n    Go to Admin<\/a>\n  <\/code>\n})\nexport class SomeComponent {\n  constructor(private onDemandPreloadingStrategy: OnDemandPreloadingStrategy) {}\n\n  preloadAdminModule(): void {\n    this.onDemandPreloadingStrategy.startPreload('admin');\n  }\n}\n\n\/\/ app-routing.module.ts\nimport { OnDemandPreloadingStrategy } from '.\/on-demand-preloading.strategy';\n\nconst routes: Routes = [\n  { path: 'home', component: HomeComponent },\n  {\n    path: 'admin',\n    loadChildren: () => import('.\/admin\/admin.module').then(m => m.AdminModule),\n    data: { preloadOnDemand: true } \/\/ Mark this module for on-demand preloading\n  },\n  \/\/ ...\n];\n\n@NgModule({\n  imports: [RouterModule.forRoot(routes, { preloadingStrategy: OnDemandPreloadingStrategy })],\n  exports: [RouterModule],\n  providers: [OnDemandPreloadingStrategy] \/\/ Provide the strategy\n})\nexport class AppRoutingModule { }<\/code><\/pre>\n
Bu \u00f6rnek, kullan\u0131c\u0131n\u0131n bir ba\u011flant\u0131n\u0131n \u00fczerine geldi\u011finde (mouseenter<\/code> olay\u0131) ilgili mod\u00fcl\u00fc \u00f6nceden y\u00fcklemeyi tetikler. Bu, kullan\u0131c\u0131 deneyimini iyile\u015ftirirken gereksiz y\u00fcklemeleri minimumda tutar.<\/p>\n
PredictivePreloadingStrategy<\/code> \u00d6rne\u011fi (Tahminci)<\/h5>\n
Bu strateji, kullan\u0131c\u0131 davran\u0131\u015flar\u0131n\u0131, ge\u00e7mi\u015f etkile\u015fimleri veya uygulama mant\u0131\u011f\u0131n\u0131 kullanarak hangi mod\u00fcllerin gelecekte b\u00fcy\u00fck olas\u0131l\u0131kla talep edilece\u011fini tahmin eder ve bunlar\u0131 \u00f6nceden y\u00fckler. \u00d6rne\u011fin, bir e-ticaret uygulamas\u0131nda “kategoriler” sayfas\u0131ndan sonra en \u00e7ok ziyaret edilen “\u00fcr\u00fcn detaylar\u0131” sayfas\u0131n\u0131 \u00f6nceden y\u00fckleyebilir. Bu, genellikle daha karma\u015f\u0131k bir mant\u0131k gerektirir ve RxJS operat\u00f6rleri veya d\u0131\u015f servisler kullan\u0131labilir.<\/p>\n
\/\/ predictive-preloading.strategy.ts\nimport { PreloadingStrategy, Route } from '@angular\/router';\nimport { Observable, of, EMPTY, timer } from 'rxjs';\nimport { Injectable } from '@angular\/core';\nimport { map, flatMap } from 'rxjs\/operators';\n\n@Injectable({ providedIn: 'root' })\nexport class PredictivePreloadingStrategy implements PreloadingStrategy {\n  preload(route: Route, fn: () => Observable): Observable {\n    if (route.data && route.data['preloadPredictive']) {\n      const delay = route.data['preloadDelay']; \/\/ Custom delay per route\n\n      \/\/ Simulate some prediction logic: e.g., based on current route, user role, etc.\n      \/\/ For this example, we'll just use a delay.\n      \/\/ In a real scenario, this logic would be much more sophisticated.\n      \/\/ For instance, you could inject a service that analyzes user behavior.\n\n      if (delay) {\n        console.log(Preloading ${route.path} module in ${delay}ms (predictive).<\/code>);\n        return timer(delay).pipe(flatMap(() => fn()));\n      }\n      \n      \/\/ Default immediate preload if marked as predictive but no delay\n      console.log(Preloading ${route.path} module immediately (predictive).<\/code>);\n      return fn();\n\n    }\n    return EMPTY;\n  }\n}\n\n\/\/ app-routing.module.ts\nimport { PredictivePreloadingStrategy } from '.\/predictive-preloading.strategy';\n\nconst routes: Routes = [\n  { path: 'home', component: HomeComponent },\n  {\n    path: 'dashboard',\n    loadChildren: () => import('.\/dashboard\/dashboard.module').then(m => m.DashboardModule),\n    data: { preloadPredictive: true, preloadDelay: 2000 } \/\/ Preload after 2 seconds\n  },\n  {\n    path: 'settings',\n    loadChildren: () => import('.\/settings\/settings.module').then(m => m.SettingsModule),\n    data: { preloadPredictive: true } \/\/ Preload immediately after app idle\n  },\n  \/\/ ...\n];\n\n@NgModule({\n  imports: [RouterModule.forRoot(routes, { preloadingStrategy: PredictivePreloadingStrategy })],\n  exports: [RouterModule],\n  providers: [PredictivePreloadingStrategy]\n})\nexport class AppRoutingModule { }<\/code><\/pre>\n
Bu \u00f6rnekte, data<\/code> \u00f6zelli\u011fi arac\u0131l\u0131\u011f\u0131yla her rota i\u00e7in \u00f6zel bir gecikme (preloadDelay<\/code>) tan\u0131mlanm\u0131\u015ft\u0131r. Bu, uygulaman\u0131n bo\u015fta kald\u0131\u011f\u0131 anlarda mod\u00fclleri kademeli olarak y\u00fcklemesini sa\u011flar. Daha geli\u015fmi\u015f bir tahminci strateji, kullan\u0131c\u0131 otantikasyon durumuna, ge\u00e7mi\u015f gezinti yollar\u0131na veya mevcut URL’ye g\u00f6re farkl\u0131 mod\u00fclleri \u00f6nceden y\u00fckleyebilir.<\/p>\n
Preloading’in Uygulanmas\u0131 ve Konfig\u00fcrasyonu<\/h3>\n
Preloading stratejisini uygulamak olduk\u00e7a basittir.<\/p>\n
RouterModule.forRoot()<\/code> i\u00e7inde Preloading Ayarlar\u0131<\/h4>\n
Preloading stratejisi, Angular uygulaman\u0131z\u0131n ana y\u00f6nlendirme mod\u00fcl\u00fcnde (AppRoutingModule<\/code> gibi) RouterModule.forRoot()<\/code> metodunun ikinci arg\u00fcman\u0131 olan bir yap\u0131land\u0131rma nesnesi i\u00e7inde preloadingStrategy<\/code> \u00f6zelli\u011fi arac\u0131l\u0131\u011f\u0131yla tan\u0131mlan\u0131r.<\/p>\n
\/\/ app-routing.module.ts\nimport { NgModule } from '@angular\/core';\nimport { RouterModule, Routes, PreloadAllModules } from '@angular\/router';\n\/\/ import { CustomPreloadingStrategy } from '.\/custom-preloading.strategy'; \/\/ \u00d6zel stratejiniz\n\nconst routes: Routes = [\n  \/\/ ... lazy loaded routes\n];\n\n@NgModule({\n  imports: [\n    RouterModule.forRoot(routes, {\n      preloadingStrategy: PreloadAllModules \/\/ Veya CustomPreloadingStrategy\n      \/\/ enableTracing: true \/\/ Rota olaylar\u0131n\u0131 konsola yazd\u0131rmak i\u00e7in (debugging)\n    })\n  ],\n  exports: [RouterModule]\n})\nexport class AppRoutingModule { }<\/code><\/pre>\n
E\u011fer \u00f6zel bir strateji kullan\u0131yorsan\u0131z, bu stratejiyi AppModule<\/code> veya ilgili mod\u00fcl\u00fcn providers<\/code> dizisine eklemeyi unutmay\u0131n.<\/p>\n
data<\/code> \u00d6zelli\u011fi ile Mod\u00fcl Baz\u0131nda Preloading Kontrol\u00fc<\/h4>\n
\u00d6zel \u00f6n y\u00fckleme stratejilerinin en b\u00fcy\u00fck avantajlar\u0131ndan biri, her bir lazy y\u00fcklenmi\u015f rota i\u00e7in \u00f6n y\u00fckleme davran\u0131\u015f\u0131n\u0131 \u00f6zelle\u015ftirebilme yetene\u011fidir. Bu, rota yap\u0131land\u0131rmas\u0131ndaki data<\/code> \u00f6zelli\u011fi kullan\u0131larak yap\u0131l\u0131r. data<\/code> \u00f6zelli\u011fi, rotayla ili\u015fkilendirilmi\u015f rastgele verileri depolaman\u0131za olanak tan\u0131r. \u00d6zel \u00f6n y\u00fckleme stratejiniz, bu data<\/code> \u00f6zelli\u011fini okuyarak hangi mod\u00fcllerin \u00f6nceden y\u00fcklenece\u011fine karar verebilir.<\/p>\n
const routes: Routes = [\n  { path: 'home', component: HomeComponent },\n  {\n    path: 'admin',\n    loadChildren: () => import('.\/admin\/admin.module').then(m => m.AdminModule),\n    data: { preload: true, priority: 1 } \/\/ Bu mod\u00fcl\u00fc \u00f6n y\u00fckle ve y\u00fcksek \u00f6ncelik ver\n  },\n  {\n    path: 'products',\n    loadChildren: () => import('.\/products\/products.module').then(m => m.ProductsModule),\n    data: { preload: false } \/\/ Bu mod\u00fcl\u00fc \u00f6n y\u00fckleme\n  },\n  {\n    path: 'reports',\n    loadChildren: () => import('.\/reports\/reports.module').then(m => m.ReportsModule),\n    data: { preload: true, networkType: '4g' } \/\/ Sadece 4G a\u011fda \u00f6n y\u00fckle\n  },\n];<\/code><\/pre>\n
\u00d6zel \u00f6n y\u00fckleme stratejiniz, route.data<\/code>‘ya eri\u015ferek bu de\u011ferleri okuyabilir ve buna g\u00f6re preload<\/code> metodunun i\u00e7inde mant\u0131k y\u00fcr\u00fctebilir. \u00d6rne\u011fin, priority<\/code> de\u011ferine g\u00f6re mod\u00fclleri s\u0131ralayabilir veya networkType<\/code> de\u011ferine g\u00f6re a\u011f kontrol\u00fc yapabilir.<\/p>\n
Preloading’in Faydalar\u0131 ve Potansiyel Dezavantajlar\u0131<\/h3>\n
Preloading, do\u011fru uyguland\u0131\u011f\u0131nda uygulaman\u0131z\u0131n performans\u0131n\u0131 ve kullan\u0131c\u0131 deneyimini \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilir. Ancak her optimizasyon tekni\u011finde oldu\u011fu gibi, potansiyel dezavantajlar\u0131 da vard\u0131r ve dikkatli kullan\u0131lmal\u0131d\u0131r.<\/p>\n
Faydalar\u0131<\/h4>\n
*   Geli\u015ftirilmi\u015f Kullan\u0131c\u0131 Deneyimi:<\/strong> En belirgin faydas\u0131, navigasyon s\u0131ras\u0131nda y\u00fckleme gecikmelerinin ortadan kalkmas\u0131 veya azalmas\u0131d\u0131r. Bu, kullan\u0131c\u0131lar\u0131n uygulamada daha ak\u0131c\u0131 bir \u015fekilde gezinmesini sa\u011flar.
\n*   Daha H\u0131zl\u0131 Navigasyon:<\/strong> Kullan\u0131c\u0131 bir rotaya t\u0131klad\u0131\u011f\u0131nda, ilgili mod\u00fcl zaten bellekte oldu\u011fu i\u00e7in sayfa an\u0131nda y\u00fcklenir.
\n*   Artan Kullan\u0131c\u0131 Memnuniyeti:<\/strong> H\u0131zl\u0131 ve duyarl\u0131 uygulamalar, kullan\u0131c\u0131lar\u0131n daha memnun olmas\u0131n\u0131 ve uygulamay\u0131 daha s\u0131k kullanmas\u0131n\u0131 sa\u011flar.
\n*   Potansiyel SEO \u0130yile\u015fmesi:<\/strong> Dolayl\u0131 olarak, daha h\u0131zl\u0131 ve daha iyi kullan\u0131c\u0131 deneyimi sunan sayfalar, arama motorlar\u0131 taraf\u0131ndan olumlu de\u011ferlendirilebilir.
\n*   Geli\u015fmi\u015f Alg\u0131lanan Performans:<\/strong> Kullan\u0131c\u0131lar, arka planda y\u00fckleme ger\u00e7ekle\u015fti\u011fini fark etmeyebilirler, ancak navigasyonun an\u0131nda ger\u00e7ekle\u015fti\u011fini g\u00f6rd\u00fcklerinde uygulaman\u0131n genel olarak daha h\u0131zl\u0131 oldu\u011funu alg\u0131larlar.<\/p>\n
Dezavantajlar\u0131 ve Dikkat Edilmesi Gerekenler<\/h4>\n
*   Gereksiz Veri T\u00fcketimi:<\/strong> PreloadAllModules<\/code> gibi agresif stratejiler, kullan\u0131c\u0131n\u0131n asla ziyaret etmeyece\u011fi mod\u00fclleri bile y\u00fckleyebilir. Bu, \u00f6zellikle mobil veri plan\u0131 kullanan kullan\u0131c\u0131lar i\u00e7in gereksiz veri t\u00fcketimine yol a\u00e7ar.
\n*   Artan Sunucu Y\u00fck\u00fc:<\/strong> T\u00fcm mod\u00fcllerin \u00f6nceden y\u00fcklenmesi, sunucuya daha fazla HTTP iste\u011fi g\u00f6ndermek anlam\u0131na gelebilir. Bu, sunucu kaynaklar\u0131n\u0131 gereksiz yere t\u00fcketebilir.
\n*   Taray\u0131c\u0131 Kaynaklar\u0131n\u0131n T\u00fcketimi:<\/strong> \u00d6nceden y\u00fcklenen mod\u00fcller, taray\u0131c\u0131n\u0131n belle\u011finde yer kaplar ve CPU’yu ayr\u0131\u015ft\u0131rma ve derleme i\u015flemleri i\u00e7in kullan\u0131r. \u00c7ok say\u0131da b\u00fcy\u00fck mod\u00fcl\u00fcn ayn\u0131 anda y\u00fcklenmesi, \u00f6zellikle d\u00fc\u015f\u00fck performansl\u0131 cihazlarda taray\u0131c\u0131n\u0131n yava\u015flamas\u0131na neden olabilir.
\n*   Yanl\u0131\u015f Strateji Se\u00e7imi:<\/strong> Uygulaman\u0131z\u0131n ihtiya\u00e7lar\u0131na uygun olmayan bir preloading stratejisi se\u00e7mek, performans\u0131 iyile\u015ftirmek yerine k\u00f6t\u00fcle\u015ftirebilir. \u00d6rne\u011fin, her \u015feyi \u00f6nceden y\u00fcklemek, uygulaman\u0131n ilk y\u00fcklemesini h\u0131zland\u0131rsa da, di\u011fer kritik arka plan g\u00f6revlerini aksatabilir.
\n*   Karma\u015f\u0131kl\u0131k:<\/strong> \u00d6zel \u00f6n y\u00fckleme stratejileri olu\u015fturmak, ek kodlama ve bak\u0131m gerektirebilir. Bu, geli\u015ftirme s\u00fcrecine ek bir karma\u015f\u0131kl\u0131k katman\u0131 ekler.<\/p>\n
Preloading Stratejisi Se\u00e7erken Nelere Dikkat Edilmeli?<\/h3>\n
Do\u011fru preloading stratejisini se\u00e7mek, uygulaman\u0131z\u0131n \u00f6zel ihtiya\u00e7lar\u0131na ve kullan\u0131c\u0131 kitlenizin \u00f6zelliklerine ba\u011fl\u0131d\u0131r. Karar verirken a\u015fa\u011f\u0131daki fakt\u00f6rleri g\u00f6z \u00f6n\u00fcnde bulundurmal\u0131s\u0131n\u0131z:<\/p>\n
1.  Uygulaman\u0131n Boyutu ve Karma\u015f\u0131kl\u0131\u011f\u0131:<\/strong>
\n    *   K\u00fc\u00e7\u00fck\/Orta \u00d6l\u00e7ekli Uygulamalar:<\/strong> Genellikle PreloadAllModules<\/code> yeterli olabilir. T\u00fcm mod\u00fcllerin boyutu toplamda \u00e7ok b\u00fcy\u00fck de\u011filse, bu strateji iyi bir denge sa\u011flayabilir.
\n    *   B\u00fcy\u00fck\/Karma\u015f\u0131k Uygulamalar:<\/strong> \u00d6zel bir strateji, hangi mod\u00fcllerin \u00f6ncelikli oldu\u011funu ve ne zaman y\u00fcklenece\u011fini belirlemek i\u00e7in daha uygun olacakt\u0131r.<\/p>\n
2.  Kullan\u0131c\u0131 Kitlesi ve A\u011f Ko\u015fullar\u0131:<\/strong>
\n    *   H\u0131zl\u0131 ve Sabit A\u011f Ba\u011flant\u0131lar\u0131:<\/strong> PreloadAllModules<\/code> veya daha agresif \u00f6zel stratejiler daha az risk ta\u015f\u0131r.
\n    *   De\u011fi\u015fken veya Yava\u015f A\u011f Ba\u011flant\u0131lar\u0131 (Mobil Kullan\u0131c\u0131lar):<\/strong> A\u011f durumuna duyarl\u0131 (NetworkAwarePreloadingStrategy<\/code>) veya talebe dayal\u0131 (OnDemandPreloadingStrategy<\/code>) stratejiler tercih edilmelidir. Kullan\u0131c\u0131lar\u0131n veri planlar\u0131n\u0131 gereksiz yere t\u00fcketmemek \u00f6nemlidir.<\/p>\n
3.  Kullan\u0131c\u0131 Davran\u0131\u015flar\u0131 ve Uygulama Ak\u0131\u015flar\u0131:<\/strong>
\n    *   Belirli Mod\u00fcllerin S\u0131k Ziyaret Edilmesi:<\/strong> Kullan\u0131c\u0131lar\u0131n belirli bir ana sayfadan sonra her zaman belirli bir mod\u00fcle gitti\u011fi biliniyorsa, o mod\u00fcl\u00fc \u00f6nceden y\u00fcklemek mant\u0131kl\u0131d\u0131r.
\n    *   Tahmin Edilebilir Gezinme Yollar\u0131:<\/strong> Kullan\u0131c\u0131lar\u0131n uygulaman\u0131zda genellikle belirli bir yol izledi\u011fi durumlarda tahminci stratejiler kullan\u0131labilir.
\n    *   S\u0131k Kullan\u0131lmayan Mod\u00fcller:<\/strong> Nadiren ziyaret edilen mod\u00fcllerin \u00f6nceden y\u00fcklenmesi gereksizdir ve kaynak israf\u0131na yol a\u00e7ar. Bu t\u00fcr mod\u00fcller i\u00e7in NoPreloading<\/code> veya \u00f6zel bir strateji ile hari\u00e7 tutma tercih edilmelidir.<\/p>\n
4.  Kaynak B\u00fct\u00e7esi:<\/strong>
\n    *   Uygulaman\u0131z\u0131n toplam JavaScript boyutu, bellek kullan\u0131m\u0131 ve CPU t\u00fcketimi i\u00e7in bir b\u00fct\u00e7eniz varsa, preloading stratejinizin bu b\u00fct\u00e7eyi a\u015fmad\u0131\u011f\u0131ndan emin olun. Geli\u015fmi\u015f stratejilerle bile, a\u015f\u0131r\u0131 \u00f6n y\u00fckleme performans\u0131 d\u00fc\u015f\u00fcrebilir.<\/p>\n
5.  Geli\u015ftirme ve Bak\u0131m Karma\u015f\u0131kl\u0131\u011f\u0131:<\/strong>
\n    *   PreloadAllModules<\/code> en basitidir ve neredeyse hi\u00e7 bak\u0131m gerektirmez.
\n    *   \u00d6zel stratejiler, uygulaman\u0131z\u0131n b\u00fcy\u00fckl\u00fc\u011f\u00fcne ve ihtiya\u00e7lar\u0131na g\u00f6re daha fazla geli\u015ftirme ve s\u00fcrekli bak\u0131m gerektirir. Karma\u015f\u0131kl\u0131\u011f\u0131n faydalar\u0131n\u0131 dengelemelisiniz.<\/p>\n
\u00d6zetle:<\/strong> Her uygulama i\u00e7in tek bir “en iyi” preloading stratejisi yoktur. Uygulaman\u0131z\u0131n analitik verilerini inceleyerek, kullan\u0131c\u0131 davran\u0131\u015flar\u0131n\u0131 anlayarak ve farkl\u0131 stratejileri test ederek en uygun \u00e7\u00f6z\u00fcm\u00fc bulman\u0131z gerekir. Ba\u015flang\u0131\u00e7ta PreloadAllModules<\/code> ile ba\u015flay\u0131p, performans metriklerini izleyerek ve kullan\u0131c\u0131 geri bildirimlerini dikkate alarak daha \u00f6zelle\u015fmi\u015f bir stratejiye ge\u00e7mek iyi bir yakla\u015f\u0131md\u0131r.<\/p>\n
Preloading’i Geli\u015ftirmek \u0130\u00e7in \u0130leri Teknikler<\/h3>\n
Preloading tek ba\u015f\u0131na g\u00fc\u00e7l\u00fc bir ara\u00e7 olsa da, web performans\u0131n\u0131 daha da optimize etmek i\u00e7in di\u011fer ileri tekniklerle birle\u015ftirilebilir.<\/p>\n
Service Worker ve Cache API ile Kombinasyon<\/h4>\n
Service Worker’lar, taray\u0131c\u0131 ile a\u011f aras\u0131nda bir proxy g\u00f6revi g\u00f6ren JavaScript kodlar\u0131d\u0131r. Cache API ile birle\u015fti\u011finde, kaynaklar\u0131 \u00e7evrimd\u0131\u015f\u0131 kullan\u0131m i\u00e7in \u00f6nbelle\u011fe alabilirler. Preloading ile birlikte kullan\u0131ld\u0131\u011f\u0131nda:
\n*   Daha Kal\u0131c\u0131 \u00d6nbellekleme:<\/strong> Preloading ile indirilen mod\u00fcller, Service Worker taraf\u0131ndan \u00f6nbelle\u011fe al\u0131narak sonraki ziyaretlerde a\u011f iste\u011fi yapmadan do\u011frudan \u00f6nbellekten servis edilebilir. Bu, uygulaman\u0131n \u00e7evrimd\u0131\u015f\u0131 \u00e7al\u0131\u015fmas\u0131na veya \u00e7ok h\u0131zl\u0131 bir \u015fekilde y\u00fcklenmesine olanak tan\u0131r.
\n*   Daha \u0130yi G\u00fcvenilirlik:<\/strong> A\u011f ba\u011flant\u0131s\u0131 kesilse bile, \u00f6nceden y\u00fcklenmi\u015f ve \u00f6nbelle\u011fe al\u0131nm\u0131\u015f mod\u00fcller kullan\u0131labilir kal\u0131r.
\nAngular CLI, @angular\/pwa<\/code> paketi arac\u0131l\u0131\u011f\u0131yla kolayca Service Worker entegrasyonu sa\u011flar.<\/p>\n
HTTP\/2 Server Push<\/h4>\n
HTTP\/2 protokol\u00fc, sunucunun bir istemci taraf\u0131ndan hen\u00fcz talep edilmemi\u015f kaynaklar\u0131 proaktif olarak g\u00f6ndermesine olanak tan\u0131yan “Server Push” \u00f6zelli\u011fini sunar. Bu, taray\u0131c\u0131n\u0131n HTML’yi ayr\u0131\u015ft\u0131r\u0131p ek kaynaklar\u0131 (CSS, JS, resimler) talep etmesini beklemeden \u00f6nce sunucunun bu kaynaklar\u0131 g\u00f6ndermesine izin verir.
\n*   Daha H\u0131zl\u0131 \u0130lk Y\u00fckleme:<\/strong> \u00d6zellikle ilk sayfa y\u00fcklemesinde kritik kaynaklar\u0131n taray\u0131c\u0131ya daha erken ula\u015fmas\u0131n\u0131 sa\u011flayarak, taray\u0131c\u0131n\u0131n render s\u00fcrecini h\u0131zland\u0131r\u0131r.
\n*   Preloading ile Entegrasyon:<\/strong> Preloading stratejinizle birlikte, sunucunuzu gelecekteki navigasyonlar i\u00e7in gerekli olan lazy mod\u00fclleri \u00f6nceden g\u00f6ndermesi i\u00e7in yap\u0131land\u0131rabilirsiniz. Bu, taray\u0131c\u0131da preloading mant\u0131\u011f\u0131na ihtiya\u00e7 duymadan bile mod\u00fcllerin daha erken ula\u015fmas\u0131n\u0131 sa\u011flayabilir. Ancak, Server Push’un do\u011fru kullan\u0131lmas\u0131 \u00f6nemlidir, aksi takdirde gereksiz kaynaklar\u0131n g\u00f6nderilmesi performans\u0131 k\u00f6t\u00fcle\u015ftirebilir.<\/p>\n
Web Workers<\/h4>\n
Web Workers, JavaScript’i ana i\u015f par\u00e7ac\u0131\u011f\u0131ndan (main thread) ayr\u0131 bir arka plan i\u015f par\u00e7ac\u0131\u011f\u0131nda \u00e7al\u0131\u015ft\u0131rman\u0131n bir yoludur. Bu, \u00f6zellikle yo\u011fun hesaplama gerektiren veya uzun s\u00fcren g\u00f6revlerin ana UI i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 bloke etmesini \u00f6nler.
\n*   Performans\u0131 Art\u0131rma:<\/strong> Mod\u00fcllerin y\u00fcklenmesi, ayr\u0131\u015ft\u0131r\u0131lmas\u0131 ve derlenmesi gibi i\u015flemler, ana i\u015f par\u00e7ac\u0131\u011f\u0131 \u00fczerinde \u00f6nemli bir y\u00fck olu\u015fturabilir. Web Workers kullanarak bu i\u015flemleri arka plana ta\u015f\u0131yarak, UI’\u0131n daha duyarl\u0131 kalmas\u0131n\u0131 sa\u011flayabilirsiniz.
\n*   Geli\u015fmi\u015f Preloading:<\/strong> \u00c7ok b\u00fcy\u00fck veya karma\u015f\u0131k mod\u00fcllerin \u00f6nceden y\u00fcklenmesi s\u0131ras\u0131nda, bu mod\u00fcllerin ayr\u0131\u015ft\u0131r\u0131lmas\u0131 ve derlenmesi gibi ad\u0131mlar bir Web Worker’da ger\u00e7ekle\u015ftirilerek ana i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n serbest kalmas\u0131 sa\u011flanabilir. Bu, preloading’in kendisinin kullan\u0131c\u0131 deneyimini olumsuz etkileme riskini azalt\u0131r. Angular CLI, @angular\/web-worker<\/code> paketi ile Web Worker entegrasyonunu basitle\u015ftirir.<\/p>\n
Bu ileri teknikler, preloading stratejinizi daha da g\u00fc\u00e7lendirerek, uygulaman\u0131z\u0131n genel performans\u0131n\u0131 ve yan\u0131t verebilirli\u011fini en \u00fcst d\u00fczeye \u00e7\u0131karman\u0131za yard\u0131mc\u0131 olabilir. Ancak her birinin kendi karma\u015f\u0131kl\u0131\u011f\u0131 ve uygulama senaryolar\u0131 oldu\u011funu unutmamak \u00f6nemlidir.<\/p>\n
\u00d6rnek Uygulama Senaryolar\u0131<\/h3>\n
Preloading, \u00e7e\u015fitli uygulama t\u00fcrlerinde ve senaryolar\u0131nda b\u00fcy\u00fck faydalar sa\u011flayabilir. \u0130\u015fte baz\u0131 \u00f6rnekler:<\/p>\n
1.  E-ticaret Uygulamalar\u0131:<\/strong>
\n    *   Senaryo:<\/strong> Kullan\u0131c\u0131lar genellikle bir \u00fcr\u00fcn listeleme sayfas\u0131ndan (kategori sayfas\u0131) bir veya daha fazla \u00fcr\u00fcn\u00fcn detay sayfas\u0131na giderler.
\n    *   Preloading Stratejisi:<\/strong> OnDemandPreloadingStrategy<\/code> veya \u00f6zel bir tahminci strateji kullan\u0131labilir. Kullan\u0131c\u0131 bir \u00fcr\u00fcn kart\u0131n\u0131n \u00fczerine geldi\u011finde veya kategori sayfas\u0131n\u0131 g\u00f6r\u00fcnt\u00fcledikten k\u0131sa bir s\u00fcre sonra en pop\u00fcler \u00fcr\u00fcn detay mod\u00fcllerini \u00f6nceden y\u00fckle.
\n    *   Fayda:<\/strong> Kullan\u0131c\u0131 bir \u00fcr\u00fcn detay\u0131na t\u0131klad\u0131\u011f\u0131nda, sayfa an\u0131nda y\u00fcklenir ve sat\u0131n alma s\u00fcrecindeki s\u00fcrt\u00fcnme azal\u0131r.<\/p>\n
2.  Blog veya Haber Siteleri:<\/strong>
\n    *   Senaryo:<\/strong> Bir kullan\u0131c\u0131 bir makaleyi okurken, genellikle ilgili di\u011fer makalelere veya bir sonraki makaleye ge\u00e7i\u015f yapar.
\n    *   Preloading Stratejisi:<\/strong> Mevcut makaleyle ilgili di\u011fer makalelerin veya bir sonraki makalenin lazy y\u00fcklenmi\u015f mod\u00fcllerini \u00f6nceden y\u00fcklemek i\u00e7in \u00f6zel bir strateji kullan\u0131labilir.
\n    *   Fayda:<\/strong> Okuma deneyimi kesintisiz olur, kullan\u0131c\u0131lar bir makaleden di\u011ferine h\u0131zl\u0131ca ge\u00e7ebilir, bu da sitede kalma s\u00fcresini art\u0131rabilir.<\/p>\n
3.  Y\u00f6netim Panelleri (Admin Panelleri):<\/strong>
\n    *   Senaryo:<\/strong> Y\u00f6neticiler genellikle belirli b\u00f6l\u00fcmleri (\u00f6rne\u011fin, kullan\u0131c\u0131 y\u00f6netimi, \u00fcr\u00fcn y\u00f6netimi, raporlar) s\u0131k\u00e7a ziyaret ederler.
\n    *   Preloading Stratejisi:<\/strong> PreloadAllModules<\/code> e\u011fer panel \u00e7ok b\u00fcy\u00fck de\u011filse veya s\u0131k ziyaret edilen mod\u00fcller i\u00e7in \u00f6zel bir strateji (data<\/code> \u00f6zelli\u011fi ile i\u015faretlenmi\u015f mod\u00fclleri \u00f6nceden y\u00fckle) kullan\u0131labilir. Kullan\u0131c\u0131n\u0131n rol\u00fcne g\u00f6re de \u00f6n y\u00fckleme yap\u0131labilir (\u00f6rne\u011fin, “analist” rol\u00fcndeki kullan\u0131c\u0131lar i\u00e7in sadece rapor mod\u00fcllerini \u00f6nceden y\u00fckle).
\n    *   Fayda:<\/strong> Y\u00f6neticilerin i\u015f ak\u0131\u015flar\u0131 h\u0131zlan\u0131r, s\u0131k kullan\u0131lan ara\u00e7lara an\u0131nda eri\u015fim sa\u011flan\u0131r.<\/p>\n
4.  Kurumsal Uygulamalar:<\/strong>
\n    *   Senaryo:<\/strong> B\u00fcy\u00fck kurumsal uygulamalarda bir\u00e7ok farkl\u0131 b\u00f6l\u00fcm ve i\u015flevsel mod\u00fcl bulunur. Kullan\u0131c\u0131lar genellikle kendi departmanlar\u0131na veya g\u00f6revlerine \u00f6zel mod\u00fclleri kullan\u0131r.
\n    *   Preloading Stratejisi:<\/strong> Kullan\u0131c\u0131n\u0131n rol\u00fcne, yetkilerine veya ge\u00e7mi\u015f kullan\u0131m verilerine dayal\u0131 \u00f6zel bir tahminci strateji. \u00d6rne\u011fin, “Finans” departman\u0131ndaki bir kullan\u0131c\u0131 i\u00e7in finans mod\u00fcllerini \u00f6nceden y\u00fckle.
\n    *   Fayda:<\/strong> Kullan\u0131c\u0131lar, kendileri i\u00e7in en alakal\u0131 ve s\u0131k kulland\u0131klar\u0131 mod\u00fcllere h\u0131zl\u0131ca eri\u015fir, bu da \u00fcretkenli\u011fi art\u0131r\u0131r.<\/p>\n
5.  E\u011fitim Platformlar\u0131:<\/strong>
\n    *   Senaryo:<\/strong> \u00d6\u011frenciler genellikle bir dersi tamamlad\u0131ktan sonra bir sonraki derse veya ilgili ek materyallere ge\u00e7erler.
\n    *   Preloading Stratejisi:<\/strong> Mevcut dersin tamamlanmas\u0131na yak\u0131n veya bir ders bitiminde bir sonraki dersin veya test mod\u00fcl\u00fcn\u00fcn \u00f6nceden y\u00fcklenmesi.
\n    *   Fayda:<\/strong> \u00d6\u011frenme ak\u0131\u015f\u0131 kesintisiz devam eder, \u00f6\u011frencilerin platformdaki etkile\u015fimi artar.<\/p>\n
Bu senaryolar, preloading’in sadece performans art\u0131\u015f\u0131 sa\u011flamakla kalmay\u0131p, ayn\u0131 zamanda uygulaman\u0131n genel kullan\u0131c\u0131 deneyimini ve i\u015flevselli\u011fini nas\u0131l iyile\u015ftirebilece\u011fini g\u00f6stermektedir. Her senaryo i\u00e7in en uygun stratejiyi belirlemek, uygulaman\u0131n \u00f6zel ihtiya\u00e7lar\u0131na ve kullan\u0131c\u0131 davran\u0131\u015flar\u0131na ba\u011fl\u0131d\u0131r.<\/p>\n
Sonu\u00e7<\/h3>\n
Angular uygulamalar\u0131nda preloading, lazy loading’in sundu\u011fu ilk y\u00fckleme avantajlar\u0131n\u0131 korurken, navigasyon s\u0131ras\u0131ndaki gecikmeleri ortadan kald\u0131rarak veya \u00f6nemli \u00f6l\u00e7\u00fcde azaltarak kullan\u0131c\u0131 deneyimini \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftiren g\u00fc\u00e7l\u00fc bir performans optimizasyon tekni\u011fidir. NoPreloading<\/code> (varsay\u0131lan), PreloadAllModules<\/code> ve \u00f6zel \u00f6n y\u00fckleme stratejileri gibi farkl\u0131 se\u00e7enekler sunan Angular Router, geli\u015ftiricilere uygulaman\u0131n \u00f6zel ihtiya\u00e7lar\u0131na g\u00f6re esneklik sa\u011flar.<\/p>\n
PreloadAllModules<\/code> basit ve h\u0131zl\u0131 bir ba\u015flang\u0131\u00e7 i\u00e7in iyi bir se\u00e7enek olsa da, b\u00fcy\u00fck uygulamalarda gereksiz kaynak t\u00fcketimine yol a\u00e7abilir. Bu noktada, a\u011f durumuna duyarl\u0131, talep \u00fczerine veya tahminci yakla\u015f\u0131mlar gibi \u00f6zel stratejiler devreye girer. Bu stratejiler, hangi mod\u00fcllerin ne zaman ve hangi ko\u015fullar alt\u0131nda \u00f6nceden y\u00fcklenece\u011fi \u00fczerinde tam kontrol sa\u011flayarak, performans ile kaynak verimlili\u011fi aras\u0131nda ideal bir denge kurmaya yard\u0131mc\u0131 olur.<\/p>\n
Preloading’i uygularken, uygulaman\u0131z\u0131n boyutunu, kullan\u0131c\u0131 kitlesinin a\u011f ko\u015fullar\u0131n\u0131 ve tipik kullan\u0131c\u0131 davran\u0131\u015flar\u0131n\u0131 dikkatlice analiz etmek \u00e7ok \u00f6nemlidir. Yanl\u0131\u015f se\u00e7ilen bir strateji, performans\u0131 iyile\u015ftirmek yerine k\u00f6t\u00fcle\u015ftirebilir. Ayr\u0131ca, Service Worker’lar, HTTP\/2 Server Push ve Web Workers gibi ileri tekniklerle birle\u015ftirildi\u011finde, preloading’in potansiyeli daha da art\u0131r\u0131larak uygulaman\u0131n genel yan\u0131t verebilirli\u011fi ve kullan\u0131c\u0131 memnuniyeti en \u00fcst d\u00fczeye \u00e7\u0131kar\u0131labilir.<\/p>\n
Sonu\u00e7 olarak, Angular geli\u015ftiricileri i\u00e7in preloading, modern web uygulamalar\u0131n\u0131n h\u0131zl\u0131, ak\u0131c\u0131 ve etkile\u015fimli olma beklentilerini kar\u015f\u0131lamada kritik bir rol oynayan vazge\u00e7ilmez bir ara\u00e7t\u0131r. Do\u011fru strateji se\u00e7imi ve dikkatli uygulama ile, kullan\u0131c\u0131lar\u0131n\u0131za kesintisiz ve keyifli bir deneyim sunabilirsiniz.<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"Angular Uygulamalar\u0131nda Mod\u00fcl \u00d6n Y\u00fcklemesi (Preloading): Performans Optimizasyonunun Anahtar\u0131\nGiri\u015f: Angular Uygulamalar\u0131nda Performans\u0131n \u00d6n","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":[1488],"tags":[],"class_list":{"0":"post-30976","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-angular","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nAngular Uygulamalar\u0131nda Mod\u00fcl \u00d6n Y\u00fcklemesi (Preloading): Performans Optimizasyonunun Anahtar\u0131 - 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