| // Copyright 2023 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package slog_test |
| |
| import ( |
| "log" |
| "log/slog" |
| "log/slog/internal/slogtest" |
| "os" |
| ) |
| |
| // This example shows how to use slog.SetLogLoggerLevel to change the minimal level |
| // of the internal default handler for slog package before calling slog.SetDefault. |
| func ExampleSetLogLoggerLevel_log() { |
| defer log.SetFlags(log.Flags()) // revert changes after the example |
| log.SetFlags(0) |
| defer log.SetOutput(log.Writer()) // revert changes after the example |
| log.SetOutput(os.Stdout) |
| |
| // Default logging level is slog.LevelInfo. |
| log.Print("log debug") // log debug |
| slog.Debug("debug") // no output |
| slog.Info("info") // INFO info |
| |
| // Set the default logging level to slog.LevelDebug. |
| currentLogLevel := slog.SetLogLoggerLevel(slog.LevelDebug) |
| defer slog.SetLogLoggerLevel(currentLogLevel) // revert changes after the example |
| |
| log.Print("log debug") // log debug |
| slog.Debug("debug") // DEBUG debug |
| slog.Info("info") // INFO info |
| |
| // Output: |
| // log debug |
| // INFO info |
| // log debug |
| // DEBUG debug |
| // INFO info |
| } |
| |
| // This example shows how to use slog.SetLogLoggerLevel to change the minimal level |
| // of the internal writer that uses the custom handler for log package after |
| // calling slog.SetDefault. |
| func ExampleSetLogLoggerLevel_slog() { |
| // Set the default logging level to slog.LevelError. |
| currentLogLevel := slog.SetLogLoggerLevel(slog.LevelError) |
| defer slog.SetLogLoggerLevel(currentLogLevel) // revert changes after the example |
| |
| defer slog.SetDefault(slog.Default()) // revert changes after the example |
| slog.SetDefault(slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{ReplaceAttr: slogtest.RemoveTime}))) |
| |
| log.Print("error") // level=ERROR msg=error |
| |
| // Output: |
| // level=ERROR msg=error |
| } |