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Re: The global object in browsers

by Mark Miller-2 :: Rate this Message:

On Tue, Feb 17, 2009 at 3:02 PM, Ian Hickson <ian@...> wrote:

Here are some demos. 001 is a control test. If it says "false", you have a
violation of ES, and are likely incompatible with legacy content. If it
says "true", then test 002. If 002 says "false", then ES is being violated
in some way. If 002 doesn't say anything, then code is being blocked when
the global object doesn't match the current document; Mozilla, Apple, and
Opera have all told me not to do that for performance reasons. If it says
false, then test 005 -- if that says true before and false after, then the
browser is probably incompatible with legacy content.

http://damowmow.com/playground/demos/global-object/001.html
http://damowmow.com/playground/demos/global-object/002.html
http://damowmow.com/playground/demos/global-object/005.html

FF = Firefox 3.0.6
WK = WebKit nightly for Safari Version 3.2.1 (5525.27.1)
CR = Chrome 1.0.154.48

OP = Opera 9.62
IE = IE 6.0.2900

T = true
F = false
B = apparently blocked, since nothing happened

(view in a fixed width font)

     test 1    test 2 before after   test 5 before after
FF     T                T      B              T      B
WK     T                T      F              T      T
CR     T                T      T              T      B
OP     T                T      T              T      F
IE     T                T      B              F      B

Since cross-browser legacy content must work across this range of behaviors, it seems there is not any one legacy behavior to codify.

Nice tests!

--

Cheers,
--MarkM

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