Simple JavaScript logger written in TypeScript that can be used in browser or node application.
The package is most useful when used with TypeScript.
npm install simplr-loggerimport { LoggerBuilder } from "simplr-logger";
const logger = new LoggerBuilder();import { LoggerBuilder, LoggerConfigurationBuilder, LogLevel } from "simplr-logger";
import { FileMessageHandler, ConsoleMessageHandler } from "simplr-logger/handlers";
const config = new LoggerConfigurationBuilder()
.SetDefaultLogLevel(LogLevel.Trace)
.AddWriteMessageHandlers([
{ Handler: new ConsoleMessageHandler() },
{ Handler: new FileMessageHandler("./logs.txt") }]
)
.Build();
const logger = new LoggerBuilder(config);import { LoggerBuilder, LogLevel, ConsoleMessageHandler } from "simplr-logger";
const logger = new LoggerBuilder({
DefaultLogLevel: {
LogLevel: LogLevel.Trace,
LogLevelIsBitMask: false
},
WriteMessageHandlers: [{
Handler: new ConsoleMessageHandler(),
LogLevel: LogLevel.Critical | LogLevel.Debug,
LogLevelIsBitMask: true
}]
});logger.Critical("Critical", "message");
logger.Debug("Debug", "message");
logger.Error("Error", "message");
logger.Info("Info", "message");
logger.Warn("Warn", "message");
logger.Trace("message", "with trace");logger.Log(LogLevel.Information, "Info message");
logger.Log(LogLevel.Critical, new Error("Critical error"));// Using old configuration
logger.UpdateConfiguration(builder => builder.SetPrefix("[new prefix]").Build());
// Or with default configuration
logger.UpdateConfiguration(builder => builder.SetPrefix("[new prefix]").Build(), false);| Name | Value | Description |
|---|---|---|
| None | 0 | Not used for writing log messages. Specifies that a logging category should not write any messages. |
| Critical | 1 | Logs that describe an unrecoverable application or system crash, or a catastrophic failure that requires immediate attention. |
| Error | 2 | Logs that highlight when the current flow of execution is stopped due to a failure. These should indicate a failure in the current activity, not an application-wide failure. |
| Warning | 4 | Logs that highlight an abnormal or unexpected event in the application flow, but do not otherwise cause the application execution to stop. |
| Information | 8 | Logs that track the general flow of the application. These logs should have long-term value. |
| Debug | 16 | Logs that are used for interactive investigation during development. These logs should primarily contain information useful for debugging and have no long-term value. |
| Trace | 32 | Logs that contain the most detailed messages. These messages may contain sensitive application data. These messages are disabled by default and should never be enabled in a production environment. |
TODO
Released under the MIT license.