How to Use context.WithoutCancel (Go 1.21+)

Use context.WithoutCancel to create a derived context that ignores cancellation signals from its parent while preserving values and deadlines.

import "context"

// ctx is a cancellable context
ctx, cancel := context.WithCancel(context.Background())

// newCtx ignores cancellation from ctx but keeps its values and deadline
newCtx := context.WithoutCancel(ctx)

// cancel() will NOT cancel newCtx
cancel()

// newCtx.Err() returns nil (unless deadline passed)
if newCtx.Err() != nil {
    // handle error
}

context.WithoutCancel creates a copy of a context that cannot be canceled by its parent, even if the parent is stopped. It is useful when you need to run a background cleanup task that must finish even after the main request has been canceled. Think of it as a child process that continues working even after the parent process shuts down.