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electron-log
Advanced tools
The electron-log package is a logging library specifically designed for Electron applications. It allows you to log messages to various outputs such as the console, files, and remote servers. It is highly configurable and supports different log levels, making it a versatile tool for debugging and monitoring Electron apps.
Console Logging
Logs messages to the console. This is useful for debugging during development.
const log = require('electron-log');
log.info('Hello, console!');
File Logging
Logs messages to a file. This is useful for keeping a persistent log that can be reviewed later.
const log = require('electron-log');
log.transports.file.file = '/path/to/log.txt';
log.info('Hello, file!');
Remote Logging
Logs messages to a remote server. This is useful for centralized logging and monitoring.
const log = require('electron-log');
log.transports.remote.url = 'https://your-log-server.com/log';
log.info('Hello, remote server!');
Custom Transports
Allows you to define custom transports for logging. This is useful for extending the logging functionality to meet specific needs.
const log = require('electron-log');
log.transports.custom = (msg) => {
// Custom transport logic
console.log('Custom transport:', msg);
};
log.info('Hello, custom transport!');
Log Levels
Supports different log levels (error, warn, info, verbose, debug, silly). This is useful for controlling the verbosity of the logs.
const log = require('electron-log');
log.level = 'warn';
log.info('This will not be logged');
log.warn('This will be logged');
Winston is a versatile logging library for Node.js that supports multiple transports, log levels, and formats. It is highly configurable and can be used in a variety of applications, not just Electron.
Bunyan is a simple and fast JSON logging library for Node.js. It is designed for high-performance logging and supports various transports and log levels. It is particularly useful for applications that require structured logging.
Log4js is a logging library inspired by the Java log4j library. It supports multiple appenders (transports), log levels, and configurations. It is a mature and widely-used library in the Node.js ecosystem.
Just a simple logging module for your Electron or NW.js application. No dependencies. No complicated configuration. Just require and use. Also, it can be used without Electron in any node.js application.
By default it writes logs to the following locations:
~/.config/<app name>/log.log
~/Library/Logs/<app name>/log.log
%USERPROFILE%\AppData\Roaming\<app name>\log.log
Documentation on this page is for v3.0.0 beta version, which will be released in January. Documentation for v2.2.17 is here and here is a migration guide.
Install with npm:
npm install electron-log
Install v3 beta version:
npm install electron-log@beta
const log = require('electron-log');
log.info('Hello, log');
log.warn('Some problem appears');
electron-log supports the following log levels:
error, warn, info, verbose, debug, silly
Transport is a simple function which does some work with log message. By default, two transports are active: console and file.
If you change some transport options, make sure you apply the changes both in main and renderer processes.
You can set transport options or use methods using:
log.transports.console.format = '{h}:{i}:{s} {text}';
log.transports.file.clear();
Just prints a log message to application console (main process) or to DevTools console (renderer process).
'%c{h}:{i}:{s}.{ms}%c › {text}'
(main),
'{h}:{i}:{s}.{ms} › {text}'
(renderer)The file transport writes log messages to a file.
'[{y}-{m}-{d} {h}:{i}:{s}.{ms}] [{level}] {text}'
Detailed description of file transport options and methods.
When logging inside main process, it shows log in DevTools console too. This transport can impact on performance, so it's disabled by default for packaged application.
When logging inside renderer process, it shows log in application console too. This transport can impact on performance, so it's disabled by default for packaged application.
Sends a JSON POST request with ILogMessage in the body to the specified url.
Just set level property to false, for example:
log.transports.file.level = false;
log.transports.console.level = false;
Transport is just a function (msg: ILogMessage) => void
, so you can
easily override/add your own transport.
More info.
Colors can be used for both main and DevTools console.
log.info('%cRed text. %cGreen text', 'color: red', 'color: green')
Available colors:
For DevTools console you can use other CSS properties.
electron-log can catch and log unhandled errors/rejected promises:
log.catchErrors(options = {})
;
In some situations, you may want to get more control over logging. Hook is a function which is called on each transport call.
(msg: ILogMessage, transport: ITransport) => ILogMessage
Licensed under MIT.
FAQs
Just a simple logging module for your Electron application
The npm package electron-log receives a total of 111,686 weekly downloads. As such, electron-log popularity was classified as popular.
We found that electron-log demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
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