Readonly
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What is Readonly?
The Readonly utility type in TypeScript constructs a new type where all properties of the original type are set as read-only. This means that once a property is initialized, its value cannot be changed later. This is useful for creating immutable objects and ensuring that data is not accidentally modified.
More in stage 11: Utility Types
Readonly: common questions
Can I learn Readonly in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Readonly in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Readonly tutorial for beginners?
It is lesson 61 of 93 in the free TypeScript roadmap, in stage 11, Utility Types. If you are new to TypeScript, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.