Express.js Course
Express.js
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Beginner

API Versioning

Definition

When making breaking changes to an API (changing the shape of the JSON response, removing fields), you must not break existing mobile apps or frontend clients relying on the old format. You solve this by versioning the API in the URL.

Explain Like I'm New

When making breaking changes to an API (changing the shape of the JSON response, removing fields), you must not break existing mobile apps or frontend clients relying on the old format.

Interactive Example

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Interview Questions

basic

  • What is the primary purpose of API Versioning in Express.js?
  • How do you initialize API Versioning?

intermediate

  • How does API Versioning integrate with other middleware components?
  • Can you explain a common use case for API Versioning?

advanced

  • What are the performance implications of API Versioning in a high-traffic production application?
  • How would you debug issues related to API Versioning?

trick

  • Is it possible to achieve the same result as API Versioning without using Express?

Flash Cards

Question

Define API Versioning in your own words.

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Answer

When making breaking changes to an API (changing the shape of the JSON response, removing fields), you must not break existing mobile apps or frontend clients relying on the old format.

Question

When should you avoid using API Versioning?

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Answer

It depends on the specific architectural requirements and performance bottlenecks of your application. Overusing it can sometimes lead to tightly coupled code.