Science Knowings: JavaScript Course For Social Media

API Versioning

API Versioning

Welcome back! In this session, we'll dive into API versioning, an essential practice for managing changes in your APIs.

What is API Versioning?

API versioning is the practice of adding version information to your APIs to distinguish between different versions of your API. It allows you to make changes to your API while maintaining backward compatibility.

Why is API Versioning Important?

API versioning is essential because it:

  • Allows you to make changes to your API without breaking existing clients.
  • Provides a clear way for clients to identify the version of your API they are using.
  • Helps you manage the evolution of your API over time.

Versioning Strategies

There are several different versioning strategies you can use:

  • Versioning in the URL: Adding the version number to the URL (e.g.,
  • Versioning in the Header: Including the version number in a header (e.g., Accept: application/json; version=1).
  • Versioning in the Query Parameters: Passing the version number as a query parameter (e.g.,
  • Versioning in the Media Type: Using different media types to indicate different versions of your API (e.g., application/json; version=1).

Semantic Versioning

Semantic versioning is a popular versioning scheme that uses three numbers: major.minor.patch (e.g., 1.2.3).

Breaking changesNew featuresBug fixes

Version Skewing

Version skewing is the practice of releasing a new version of your API with a higher version number than the previous version, even if the changes are not major. This can be useful for marketing purposes or to force clients to upgrade to the latest version.

Backward Compatibility

Backward compatibility means that your API should continue to work with older versions of clients. This is important for maintaining a stable and reliable API.

Forward Compatibility

Forward compatibility means that your API should be able to handle future versions of clients. This is important for ensuring the longevity of your API.

Breaking Changes

Breaking changes are changes to your API that will require clients to update their code. These changes should be made carefully and should be well-communicated to your clients.

Versioning Best Practices

Here are some best practices for API versioning:

  • Choose a versioning strategy that meets your needs.
  • Use semantic versioning to indicate the severity of changes.
  • Maintain backward compatibility as much as possible.
  • Communicate version changes to your clients.
  • Test your API with different versions of clients.

Next Up: API Authentication (JWT)

In the next session, we'll explore API authentication using JWTs. JWTs are a popular and secure way to authenticate users and protect your APIs. Follow us to learn more!