[model] How can we query availability of <model> reliably?

[Thomas Kumlehn]

If the HTML model feature is deactivated, document.createElement("model") neither triggers an exception, nor does it return HTMLUnknownElement like other browsers do.
On all Safari platforms.
What would be a valid way to use Javascript to query this feature reliably? I assume, the standards conform way should be to return HTMLUnknownElement.

[Antoine Quint]

I believe this does the trick:

function supportsModel () {
    return "HTMLModelElement" in window;
}

[Thomas Kumlehn]

Thank you very much

[Radar WebKit Bug Importer]

<rdar://problem/92470985>