On Sep 25, 2009, at 3:22 PM, David Flanagan wrote:
Charles Jolley wrote:
Has anyone considered providing a more explicit way of testing for
this? Maybe a constant that is defined somewhere.
Strict mode isn't a global on-or-off thing. Some functions can be
strict while others aren't. So you can't capture it in a constant.
Good point -- I was thinking of the useful fact to capture that the
browser supports strict mode (more below).
Anyway, that's what I'm going to do:
SC.HAS_STRICT = !(function() { return this;}());
:)
If you're testing "does this browser support strict mode" then you'd
better test it in an explicitly strict context:
SC.HAS_STRICT = (function() {
"use strict";
return !(function() { return this; }());
}());
(Or something like that. I sure will be happy when there's an
implementation to test this stuff against.)
You don't need two levels of functions. I just spaced out on the "use
strict"; in the anonymous function that returns |this|:
if (! function(){"use strict"; return this;}()) { /* strict mode
supported by the browser */ }
Otherwise, what you're testing for is something like "is this code
currently running in strict mode" or "was this library loaded under
strict mode"?
Thanks for wiping up after me. :-)
/be
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