logstorm v5.8.8
logstorm
logstorm provides a logging library built on top of loglevel.
It allows for custom plugin hooks to be added to the logging process and also provides a global logger instance.
Installation
npm install logstorm
Example
import { createLogger, logstorm } from 'logstorm';
const plugin = (hooks) => {
hooks.willLog.add(async ({ values, method }) => {
//
// Here you can intercept any call,
// see https://www.npmjs.com/package/plugin-hooks to learn how this plugin works
await writeToExternalSource(method, values);
// you can return the changed value
return { values: [...values, 'Added by plugin'] };
});
};
const customLogger = createLogger('custom', plugin);
customLogger.info('This message will have a plugin added to it');
logstorm.debug('This is a debug message from the global logger');
// You can use the lazy* methods to run expensive tasks, and return a
// list of arguments to the logger.
// In this example, the callback should return a list of arguments for logger.info
logger.lazyInfo(() => Promise.resolve([JSON.stringify(value, null, 2)]));
Usage
Basic Usage
To start using logstorm, you can import the logstorm variable and use it to log messages.
import { logstorm } from 'logstorm';
logstorm.info('This is an info message');
Custom Logger
You can also create a custom logger with a specific name.
import { createLogger } from 'logstorm';
const customLogger = createLogger('custom');
customLogger.debug('This is a debug message');
Plugins
logstorm allows you to add custom plugin hooks to the logging process. You can do this by passing a plugin function to the createLogger function.
import { createLogger } from 'logstorm';
const plugin = (hooks) => {
hooks.willLog.add(async ({ values, method }) => {
writeToExternalSource(method, values);
return { values: [...values, 'Added by plugin'] };
});
};
const logger = createLogger('loggerWithPlugin', plugin);
logger.info('This message will have a plugin added to it');
API
createLogger(name: string, plugin?: (hooks: LogStormHooks) => any): LogStorm
Creates a new logger instance with the given name. Optionally, you can pass in a plugin function to add custom hooks to the logging process.
logstorm: LogStorm
The global logger instance.
Contributing
If you are interested in contributing to logstorm, please open an issue or submit a pull request with your suggested changes.
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