iflog

A conditional console utility that only logs in development mode. It wraps all standard console methods and only outputs when process.env.NODE_ENV !== 'production'. Now with URL parameter override for production debugging!

Installation

npm i iflog

Usage

import iflog from 'iflog';

iflog.log('This will only log in development!');
iflog.error('This error will only show in development!');
iflog.table([{ a: 1 }, { a: 2 }]);

if (iflog.isEnabled()) {
  // do something only in development
}

Production Debugging

Need to debug logs in production? Simply add ?iflog=true to your URL:

https://yoursite.com/page?iflog=true

This will enable all iflog output even in production mode, allowing you to see logs on live sites when needed.

How it works

All methods are no-ops in production (process.env.NODE_ENV === 'production'), except when the URL parameter ?iflog=true is present. In development, they proxy to the corresponding console methods.

API

All methods below only output in development mode (or when ?iflog=true is in the URL):

• iflog.assert(condition, ...args)
• iflog.clear()
• iflog.count(label)
• iflog.countReset(label)
• iflog.debug(...args)
• iflog.dir(...args)
• iflog.dirxml(...args)
• iflog.error(...args)
• iflog.exception(...args) (alias for error)
• iflog.group(...args)
• iflog.groupCollapsed(...args)
• iflog.groupEnd()
• iflog.info(...args)
• iflog.log(...args)
• iflog.profile(label)
• iflog.profileEnd(label)
• iflog.table(tabularData, properties)
• iflog.time(label)
• iflog.timeEnd(label)
• iflog.timeLog(label, ...args)
• iflog.timeStamp(label)
• iflog.trace(...args)
• iflog.warn(...args)
• iflog.enable() (logs 'iflog enabled' in development)
• iflog.disable() (logs 'iflog disabled' in development)
• iflog.isEnabled() (returns true if in development mode or URL override is active, else false)

License

MIT