33018 2009-12-29 06:13:08 -0800 load event fires before external scripts have executed 2009-12-29 22:22:25 -0800 1 1 1 Unclassified WebKit Page Loading 528+ (Nightly build) PC Linux RESOLVED DUPLICATE 28783 P2 Normal --- 0 marcus webkit-unassigned ap oldest_to_newest 175529 0 45598 marcus 2009-12-29 06:13:08 -0800 Created attachment 45598 test case - inline script which adds a script tag If a script inserts another script tag having a src attribute through a DOM appendChild call, that second script will not run until after the document load event has fired, and after other scripts in the HEAD or BODY have executed. This causes problems when scripts included later in the document have dependencies on the dynamically loaded script, which is typically the case with JavaScript libraries that the page needs. This deviates from Firefox 3.5 behaviour. I suspect it may also conflict with the WHATWG draft [1] which seems to require that a script must be run synchronously when its script element is inserted. See the attached test case, in which an inline script inserts another script tag for an external file. Running the test case in Chrome 4.0.266.0 (WebKit 532.6) or Arora 0.10.1 (WebKit 532.4) on Linux gives this console output: inline HEAD adding script inline HEAD 2 inline BODY body load a executed We can see that the "a executed" output from the external script was deferred to the end, although the script was added at "adding script". In contrast, Firefox 3.5 Linux gives this order: inline HEAD adding script a executed inline HEAD 2 inline BODY body load (Another amusing fact is that the picture changes if the external script is inserted with document.write instead of the DOM method. In that case, WebKit behaves identically to Firefox. I have a bunch of different test cases for various other ways of nesting the script inclusions.) [1] http://www.whatwg.org/specs/web-apps/current-work/#script 175531 1 45600 marcus 2009-12-29 06:14:15 -0800 Created attachment 45600 the external script (one-liner) referenced by the test case 175799 2 ap 2009-12-29 22:22:25 -0800 *** This bug has been marked as a duplicate of bug 28783 *** 45598 2009-12-29 06:13:08 -0800 2009-12-29 06:13:08 -0800 test case - inline script which adds a script tag script-exec-order-test.html text/html 600 marcus PGh0bWw+CiAgICA8aGVhZD4KICAgICAgICA8dGl0bGU+c2NyaXB0IGV4ZWN1dGlvbiBvcmRlciB0 ZXN0PC90aXRsZT4KICAgICAgICA8c2NyaXB0IHR5cGU9InRleHQvamF2YXNjcmlwdCI+Y29uc29s ZS5sb2coImlubGluZSBIRUFEIik8L3NjcmlwdD4KICAgICAgICA8c2NyaXB0IHR5cGU9InRleHQv amF2YXNjcmlwdCI+CmNvbnNvbGUubG9nKCJhZGRpbmcgc2NyaXB0Iik7CnZhciBlbCA9IGRvY3Vt ZW50LmNyZWF0ZUVsZW1lbnQoIlNDUklQVCIpOwplbC50eXBlID0gInRleHQvamF2YXNjcmlwdCI7 CmVsLnNyYyA9ICJhLmpzIjsKZG9jdW1lbnQuZ2V0RWxlbWVudHNCeVRhZ05hbWUoIkhFQUQiKVsw XS5hcHBlbmRDaGlsZChlbCk7Cjwvc2NyaXB0PgogICAgICAgIDxzY3JpcHQgdHlwZT0idGV4dC9q YXZhc2NyaXB0Ij5jb25zb2xlLmxvZygiaW5saW5lIEhFQUQgMiIpPC9zY3JpcHQ+CiAgICA8L2hl YWQ+CiAgICA8Ym9keSBvbmxvYWQ9ImNvbnNvbGUubG9nKCdib2R5IGxvYWQnKSI+CiAgICAgICAg PHNjcmlwdCB0eXBlPSJ0ZXh0L2phdmFzY3JpcHQiPmNvbnNvbGUubG9nKCJpbmxpbmUgQk9EWSIp PC9zY3JpcHQ+CiAgICA8L2JvZHk+CjwvaHRtbD4K 45600 2009-12-29 06:14:15 -0800 2009-12-29 06:14:15 -0800 the external script (one-liner) referenced by the test case a.js application/x-javascript 27 marcus Y29uc29sZS5sb2coImEgZXhlY3V0ZWQiKTsK