JavaScript syntax: Difference between revisions

Revision as of 21:52, 8 April 2016

Revision as of 22:03, 8 April 2016

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Here, calling <code>isUndefined(my_var)</code> raises a {{mono|ReferenceError}}, if {{mono|my_var}} is an unknown identifier, whereas <{{code>|lang=javascript|code=typeof my_var === 'undefined'</code>}} doesn't.

===Null===