JFLogJS (MIT License)

JFLogJS library is a very little Javascript library that allows to make logging easier and better.

Installation

Add this line to your script:

<script src="JFLogging.js"></script>

NOTE: Change "src" attribute to the real script location.

Logging

JFLogJS create the "LOG" global object to write logs in the JS console. This object has some attributes and methods very easy to use.

Enabling and disabling Logging

Check the status:

// It will return "enabled" or "disabled"
LOG.status

Enable logging:

LOG.enable()

Disable logging:

LOG.disable()

Logging levels

Current logging level can be checked with:

LOG.currentLevel

Allowed logging levels are:

• all
• debug
• info
• warning
• error
• critical
• no_messages (no messages are printed)

The principal feature of this library is to print only messages with a level equal or below than currentLevel.

To change current level, use any of these:

LOG.setAllMessagesLevel()	// Change current Level to print all messages
LOG.setDebugLevel()		// Change current Level to debug
LOG.setInfoLevel()		// Change current Level to info
LOG.setWarningLevel() 	// Change current Level to warning
LOG.setErrorLevel()		// Change current Level to error
LOG.setCriticalLevel()	// Change current Level to critical
LOG.setNoMessagesLevel()	// Change current Level to No messages. No messages are printed

Print messages

Use these commands to logging your messages. Only messages with a level equal or above to current level will be printed:

LOG.all(message)
LOG.debug(message)
LOG.info(message)
LOG.warn(message)
LOG.error(message)
LOG.critical(message)

Removing milliseconds from logging Date

By default milliseconds are removed from message. If you want to print them, use this command:

LOG.removeMilSecDate = false	// show milliseconds on logging
LOG.removeMilSecDate = true		// remove milliseconds from logging

Add onMessage events

You can add your custom functions every time a kind of message is printed. Execute:

LOG.onMessage(msgType, func)

Allowed msgType are:

LOG.level_all
LOG.level_debug
LOG.level_info
LOG.level_warning
LOG.level_error
LOG.level_critical
LOG.level_nomessages