context
Concurrencyimport "context"Provides request-scoped values, cancellation signals, and deadlines across API boundaries and goroutines.
Example
package main
import (
"context"
"fmt"
"time"
)
func main() {
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
fmt.Println(ctx.Deadline())
}Key Types & Functions
ContextBackgroundTODOWithCancelWithTimeoutWithValueAbout context
The context package (imported as context) belongs to the Concurrency category of Go packages. Provides request-scoped values, cancellation signals, and deadlines across API boundaries and goroutines.
Go's standard library is one of the language's greatest strengths, providing production-ready implementations for networking, cryptography, encoding, I/O, and more. The context package follows Go's philosophy of simplicity and composability — small, focused packages that combine through interfaces like io.Reader and io.Writer.
When using context in production, follow Go best practices: handle errors explicitly, use context for cancellation and timeouts, prefer composition over inheritance, and write table-driven tests. The Go documentation at pkg.go.dev provides comprehensive API references and examples for every exported type and function.