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Comparisons of IE, Opera and Firefox on DOM (Javascript) support (Opera wins)

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Bob

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May 15, 2006, 5:42:26 AM5/15/06
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Using this page

http://en.wikipedia.org/wiki/Comparison_of_layout_engines_%28DOM%29

I made some rather unscientific computations of the levels of DOM
(Document Object Model), ie, Javascript, support for IE 6, Opera 7, 8
and 9 and Firefox 1.5

Here they are:

DOM 1 supports how many

IE5 264 (15 more are broken)
IE6 293 (15 more are broken)
Opera 7 337 (1 is broken)
Opera 8 337 (1 is broken)
Opera 9 370 (1 is broken)
Firefox 367

Opera 9 barely edges out Firefox for DOM 1 support, but it is basically
a tie. IE is quite a bit behind. Even Opera 7 bests it considerably.


DOM 2 supports how many

IE5 43 (2 more are broken)
IE6 44 (2 more are broken)
Opera 7 70
Opera 8 116
Opera 9 154
Firefox 176

Firefox definitely wins for DOM 2 support, but Opera 9 also does very
well. IE6 looks like a disaster for DOM 2. Even the older Opera 7 does
much better than IE. Even more shameful is that IE barely improved from
v5 to v6


DOM 3 supports how many

IE5 0
IE6 0
Opera 7 1
Opera 8 7
Opera 9 54
Firefox 19

Although DOM 3 is very new and not supported well by browsers, Opera 9
does dramatically better than any other browser in implementing it. IE,
shamefully, has not implemented one spec, and has not improved again
between v5 and v6. Firefox does a decent job of implementing DOM 3,
considering that no browser implements much of it.


Totals

IE5 307
IE6 337
Opera 7 408
Opera 8 460
Opera 9 578
Firefox 562


For the totals, Opera 9 has the best DOM support of any major browser!
Yaaaay! Firefox is quite close though. IE is horribly behind and has
barely improved from one old version to the next. Even Opera 7 is much
better than IE6. The only conclusion is that when it comes to DOM, IE is
an incredibly broken browser. The fact that 85% of the net is using this
stupid, broken browser is just disgusting.


Methods: I counted them by hand, so there may be some errors. Feel free
to recheck. I think my totals are pretty good though.

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