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Adding Deprecation Warning in JavaScript Console

I used this quick trick today to help me clean up and refactor some javascript functions today:

if ("console" in window)
  console.warn('DEPRECATED function call to '+ arguments.callee
  +'\nCalled by:\n'+ arguments.callee.caller );

Which results in a fine deprecation warning in the console:

There is plenty of space for improvement here. Feel free to use or tamper … but please post any alternative suggestions here as a comment.

This entry was posted by Jesper Rønn-Jensen on Thursday, July 17th, 2008 at 13:10 (GMT-1) and is filed under Code, JavaScript. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

2 Responses to “Adding Deprecation Warning in JavaScript Console”

  1. Mick Staugaard Says:
    July 17th, 2008 at 14:17 (GMT-1)

    That’s a really neat little trick! Thanks for sharing Jesper.

  2. Tobias Says:
    July 18th, 2008 at 11:22 (GMT-1)

    If you want to get the console output in Internet Explorer, you can install the Companion.JS plug-in:
    http://www.my-debugbar.com/wiki/CompanionJS/HomePage