Can you use context to pass data between components or functions?

In Go, the context (context.Context) is designed for passing cancellation signals, deadlines, and request-related values between goroutines and functions. However, using context to pass arbitrary data between components or functions is not recommended.

Reasons:

• Context should only contain data related to managing the lifecycle of an operation (e.g., timeouts, cancellation).
• Passing business data through context complicates the code and reduces readability.

The correct approach is to pass necessary data explicitly through function parameters or use other structures for data exchange.

Example of using context to pass a value related to a request:

ctx := context.WithValue(context.Background(), "userID", 12345)
userID := ctx.Value("userID")

But it is better to avoid this approach for passing data between components unless it is truly necessary for managing the operation's lifecycle.