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Test for == and === with the same operand types.

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typeof foo == "undefined";

typeof foo === "undefined";

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Dmitry A. Soshnikov on 3rd August 2010
• Revision 4: published by Kyle Simpson on 22nd February 2011
• Revision 6: published on 14th April 2011
• Revision 9: published on 4th May 2011
• Revision 10: published by Tobias Reiss on 11th January 2012
• Revision 11: published by Matthew Robb on 14th March 2012
• Revision 12: published on 27th December 2012
• Revision 13: published by Terry Anastasiadis 3 weeks ago

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