126522 2014-01-06 06:37:13 -0800 Named object access properties should be configurable or don't exist at all 2018-06-04 06:02:57 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED https://github.com/ajaxorg/ace/issues/1741 HasReduction P2 Normal --- 1 hartman.wiki webkit-unassigned oldest_to_newest 964615 0 hartman.wiki 2014-01-06 06:37:13 -0800 This is about the side effects of http://www.w3.org/TR/html5/browsers.html#named-access-on-the-window-object It seems the properties that this named access creates on the window object are non-configureable. This makes it 'randomly'/'DOM dependent' impossible to create properties on the window object. Apparently Safari is the only browser that has them unconfigurable and the only browser that has them defined as actually properties. There might be a good reason for this (security ?). However, it's annoying, especially for JS libraries that might be deployed. This impredictability of which properties on your window object are defined makes this a nuisance to developers and more so. I think this should be changed. I ran into this problem here: https://github.com/ajaxorg/ace/issues/1741 Additionally specific to Safari, this seems to create a problem with local declared but uninitialized variables, which might be even more problematic. This problem is detailed in the console.log example in http://dertompson.com/2013/08/07/named-access-on-the-window-object-in-safari/ This might give a scripter unintentional and obscured access to these named objects causing unpredictable results. Further background reading materials: http://tjvantoll.com/2012/07/19/dom-element-references-as-global-variables/ https://www.w3.org/Bugs/Public/show_bug.cgi?id=11960 1105790 1 hartman.wiki 2015-06-30 13:55:49 -0700 This seems to be fixed in Safari 9 Seed 1 ? 1228860 2 hartman.wiki 2016-09-12 12:42:23 -0700 Hmm, or not, it seems that this issue still exists and I just ran into it again. Had a header with id="addOnloadHook", then was trying to define a property on window with the key 'addOnloadHook'. This was impossible due to named access. 1229528 3 288806 hartman.wiki 2016-09-14 05:05:31 -0700 Created attachment 288806 Reduced testcase 1429799 4 hartman.wiki 2018-06-04 06:02:57 -0700 This problem seems resolved in at least Safari 11.1 Not sure when the fix was made. 288806 2016-09-14 05:05:31 -0700 2016-09-14 05:05:31 -0700 Reduced testcase namedaccess.html text/html 458 hartman.wiki PCFET0NUWVBFIGh0bWw+CjxodG1sPgo8aGVhZD4KICA8dGl0bGU+dW5uYW1lZCBhY2Nlc3M8L3Rp dGxlPgogIDxzY3JpcHQgdHlwZT0idGV4dC9qYXZhc2NyaXB0Ij4vLzwhW0NEQVRBWwogIHdpbmRv dy5vbmxvYWQ9ZnVuY3Rpb24oKXsKICAJT2JqZWN0LmRlZmluZVByb3BlcnR5KCB3aW5kb3csICdu YW1lZGFjY2VzcycsIHsKICAgIAljb25maWd1cmFibGU6IHRydWUsCiAgICAgIGVudW1lcmFibGU6 IHRydWUsCiAgICAgIGdldDogZnVuY3Rpb24oKSB7CiAgICAgIAljb25zb2xlLmxvZyggJ2dldCcg KTsKICAgICAgfSwKICAgICAgc2V0OiBmdW5jdGlvbihuZXdWYWwpIHsKICAgICAgCWNvbnNvbGUu bG9nKCAnc2V0JyApOwogICAgICB9CiAgICB9KTsKICB9Ly9dXT4KICA8L3NjcmlwdD4KPC9oZWFk Pgo8Ym9keT4KICA8aDIgaWQ9Im5hbWVkYWNjZXNzIj5IZWFkZXI8L2gyPgo8L2JvZHk+CjwvaHRt bD4=