loglevel-mixin

loglevel-mixin

Injects methods named after a set of logLevels which are only forwarding messages if the current logLevel is higher or equal to the logLevel the name of the called method reflects.

usage

const llm = require('loglevel-mixin');

let someObject = { log(level,message) { console.log(`${level} ${message}`); } };

llm.defineLoggerMethods(someObject);
llm.defineLogLevelProperties(someObject);

someObject.logLevel = 'error';
someObject.info( level => 'my info message (not reported since logLevel is error)')
someObject.logLevel = 'info';
someObject.info( level => 'my info message (reported since logLevel is now info)')

works for ES2015 classes to

const llm = require('loglevel-mixin');

class BaseClass {
  log(level, message) { console.log(`${level} ${message}`); }
}

llm.defineLoggerMethods(BaseClass.prototype);

class LoggingEnabledBaseClass extends llm.LogLevelMixin(BaseClass) {
}

const someObject = new LoggingEnabledBaseClass();

someObject.logLevel = 'error';
someObject.info( level => 'my info message (not reported since logLevel is error)')
someObject.logLevel = 'info';
someObject.info( level => 'my info message (reported since logLevel is now info)')

install

With npm do:

npm install loglevel-mixin

license

BSD-2-Clause