Check for showModalDialog support

[johkar]

Just want a verification of logic. This seems to work for IE and
Firefox, but I wonder if it would be a problematic test in any of the
other latest browsers? Is the use of the "window" object correct? I
didn't think it would be document.showModalDialog.

if(window.showModalDialog){
//do something
}
else
{
//do something else
}

Thanks, John

 

[Randy Webb]

johkar said the following on 2/8/2006 8:47 AM:

Just want a verification of logic. This seems to work for IE and
Firefox, but I wonder if it would be a problematic test in any of the
other latest browsers? Is the use of the "window" object correct?

What does the documentation say?

I didn't think it would be document.showModalDialog.

It won't.

 

[Thomas 'PointedEars' Lahn]

Just want a verification of logic. This seems to work for IE and
Firefox, but I wonder if it would be a problematic test in any of the
other latest browsers?

You only test for the existence and true-value of the property, not if it is
a method. That /is/ problematic, for another DOM could pose as IE DOM and
a call on this property could result in a TypeError.

Is the use of the "window" object correct?

It is, RTFM. showModalDialog is a method of Window objects in the IE DOM.

I didn't think it would be document.showModalDialog.

It is not.

if(window.showModalDialog){
//do something
}
else
{
//do something else
}

function isMethodType(s)
{
return (s == "function" || s == "object");
}

if (typeof window != "undefined"
&& isMethodType(typeof window.showModalDialog))
{
// do something _with showModalDialog_
}
else
{
// do something else
}


PointedEars

 

[johkar]

Thanks for the info.