--- title: "When to Use a Private Constructor" url: https://daily.dev/posts/when-to-use-a-private-constructor-rwrspnq6t source_url: https://khalilstemmler.com/blogs/typescript/when-to-use-a-private-constructor type: article source: "Khalil Stemmler" published: 2026-06-17T11:25:53.082Z updated: 2026-06-17T11:29:36.527Z tags: ["general-programming", "typescript", "domain-driven-design"] reading_time: 4 upvotes: 0 comments: 0 language: 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. # When to Use a Private Constructor **[Khalil Stemmler](https://daily.dev/sources/khalilstemmler)** · 4 min read · 0 upvotes · 0 comments ## Summary Private constructors in TypeScript prevent direct instantiation via the `new` keyword, forcing object creation through a controlled path. The recommended pattern is to combine a private constructor with a static factory method that validates inputs and returns a `Result` type instead of throwing errors. This approach enforces domain validation rules cleanly, avoids unpredictable exceptions, and enables expressive typed error handling using constructs like `Either` monads. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#general-programming](https://daily.dev/tags/general-programming), [#typescript](https://daily.dev/tags/typescript), [#domain-driven-design](https://daily.dev/tags/domain-driven-design) [View this post on daily.dev](https://daily.dev/posts/when-to-use-a-private-constructor-rwrspnq6t)