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This is (EF BB BF) C3 B6 3D 22 21 22 loaded into browsers under various labels. That happens to be properly formed ECMAScript code for all the encodings used. The bogus results for Opera9 can easily be reproduced in context of the testing script, but probably not individually from a clean cache; what's going on there is unknown. I also noted in running these tests that Opera claims "Opera supports the entire ECMA-262 2nd and 3rd standards with no exceptions" while in fact their implementation does not, the parser rejects code that follows the IdentifierStart :: UnicodeEscapeSequence production of ECMA-262 section 7.6. Instead it implements Opera-only extensions, like comma-free arrays ala [ 1 2 3 ]. Other fun facts include: IE does not implement onload for iframes and cannot modify the innerHTML or tr elements; Firefox ignores "tags" when setting the innerHTML of dynamically created tr elements with no ownerElement... Oh and Opera again needs /th "tags" so it won't nest adjacent th elements when setting innerHTML.

Some ECMAScript 4 proposals have been deemed unsound for the Web, and are off the table for good: packages, namespaces and early binding. This conclusion is key to Harmony.

In essence, Adobe has shown up to the prom, but its date has stood it up. ActionScript is now not based on any standard. It is its own, proprietary, albeit open source language. Adobe is on its own island as the rest of the industry moved to some watered down version of what it could have been. I understand why this was necessary. Brenan Eich, the father of JavaScript and the primary person driving the standard certainly didn’t want it this way. But Microsoft was never going to support 4.0.

1. Focus work on ES3.1 with full collaboration of all parties, and target two interoperable implementations by early next year. 2. Collaborate on the next step beyond ES3.1, which will include syntactic extensions but which will be more modest than ES4 in both semantic and syntactic innovation.

SMIL is a specification defining a set of elements that control animations. This is called declarative animations. FakeSmile is a SMIL implementation written in ECMAScript. It is primarily targeted to SVG animations.

The point is that JavaScript developers shouldn’t have to detect and workaround such issues. JavaScript should work the same across all implementations. We believe this is the first step in making JavaScript better. To make it possible to achieve such implementation conformance, the first step is knowing where the divergences are. We in the JScript team are looking into where various browser based implementations diverge, where our engine is incorrect in its interpretation of the specification, what if any de facto compatibility conventions have been reached, and the value of codifying such conventions into the standard. We’ve published the first draft of JScript Deviations from ES3 as a starting point.