if (document.implementation && document.implementation.createDocument)

[12938172]

Hi Guys,

What is the meaning of the following code and what does it do:

if (document.implementation && document.implementation.createDocument)

Thanks

 

[BabyJeffy]

[!]implementation[/!] is a property on [!]document[/!] (document.implementation).


[!]createDocument[/!] is a method on [!]implementation[/!] (document.implementation.createDocument()).

The code checks to see of the implementation property is present on the document object, and tests that there is a createDocument method on the implementation property. If the criteria are met, then the code bounded by the fi block will be run.

This is a way to do some browser checking (by checking for the presence of browser-specific properties and methods).

In Firefox 2.0.13 on windows, both return true.

Cheers,
Jeff

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