--- title: Dependency Injection in TypeScript | daily.dev description: Dependency Injection in TypeScript is a way to separate domain and persistence layers in Node apps. We can use TypeScript decorators to create our own DI... canonical: https://daily.dev/posts/dependency-injection-in-typescript-jofhxh3b9 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Dependency Injection in TypeScript | daily.dev og:description: Dependency Injection in TypeScript is a way to separate domain and persistence layers in Node apps. We can use TypeScript decorators to create our own DI... og:url: https://daily.dev/posts/dependency-injection-in-typescript-jofhxh3b9 og:image: https://api.daily.dev/og/posts/JoFHXH3B9.png og:image:alt: Dependency Injection in TypeScript og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Dependency Injection in TypeScript **[gitconnected](https://daily.dev/sources/gc)** · 3 min read · 40 upvotes · 0 comments ## Summary Dependency Injection in TypeScript is a way to separate domain and persistence layers in Node apps. We can use TypeScript decorators to create our own DI service with help of the Dependency Manager. We have Logger classes we want to inject and DependencyManager which stores all needed mappings. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#dependency-injection](https://daily.dev/tags/dependency-injection), [#general-programming](https://daily.dev/tags/general-programming), [#logging](https://daily.dev/tags/logging), [#typescript](https://daily.dev/tags/typescript) [View this post on daily.dev](https://daily.dev/posts/dependency-injection-in-typescript-jofhxh3b9) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Dependency Injection in TypeScript","url":"https://daily.dev/posts/dependency-injection-in-typescript-jofhxh3b9","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/dependency-injection-in-typescript-jofhxh3b9"},"datePublished":"2021-11-09T02:24:32.924Z","dateModified":"2026-03-15T02:22:14.380Z","description":"Dependency Injection in TypeScript is a way to separate domain and persistence layers in Node apps. We can use TypeScript decorators to create our own DI...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/5535ba4feeca9101cf8dfe26b5f43466","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/5535ba4feeca9101cf8dfe26b5f43466","isAccessibleForFree":true,"articleSection":"gitconnected","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"gitconnected","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/gc","url":"https://daily.dev/sources/gc"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/dependency-injection-in-typescript-jofhxh3b9","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":40},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"dependency-injection,general-programming,logging,typescript","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"gitconnected","item":"https://daily.dev/sources/gc"},{"@type":"ListItem","position":3,"name":"Dependency Injection in TypeScript"}]} ```