Comments on: Fast by Default and Web Performances

By: webreflection

webreflection — Sun, 08 Nov 2009 18:26:28 +0000

@kangax … it’s a logical fallback and for quirks I mean dirty layout. As example:
alert(document.getElementsByTagName(“head”)[0]);
will be undefined in Android
alert(document.getElementsByTagName(“head”)[0] || document.documentElement);
will be the documentElement … still Android, WebKit

I think it’s quite pretentious to think we know every browser, while I guess makes sense to use a simple logical fallback fr those browsers able to wait the end of the document before they decide that the head is a different one. The IE behavior as example is a bug, it considers head as default node the outer script tag and it moves the script itself inside the header if there is an head tag after.

Nice to see how the most pointless argument in the entire post has been underlined :P

Regards

By: kangax

kangax — Thu, 05 Nov 2009 22:13:56 +0000

There’s a comment here which says — “the head element or the documentElement (quirks)”. Which quirks is meant here? I haven’t seen a browser without HEAD element, no matter if in quirks or standard modes.

Could someone enlighten me?

By: PeterGeil

PeterGeil — Wed, 04 Nov 2009 08:31:39 +0000

@”JavaScript And Evaluated Comments”:
Where can I find more detailled tests/docs about code evaluation and how it performs? I used this method within a namespace manager tool for MooTools. The main reason for this was, that i wanted to “prepopulate” the local scope of a function being connected with specific namespace/package members, so that a class/property can be accessed without explicitly prefixing any additional object.

By: webreflection

webreflection — Tue, 03 Nov 2009 14:07:11 +0000

@broofa dunno how I could have forgot it! Thanks
@sentientholon, makes sense, I probably misunderstood that part, there is still the point it cannot be included as external file. I’ll update the post ASAP, thank you.

By: sentientholon

sentientholon — Tue, 03 Nov 2009 13:55:46 +0000

On JavaScript and evaluated comments: It’s not that evaluating JavaScript code in comments is faster than evaluating it on script download — that’s not possible, it’s the same engine doing both. That’s not the point though. The point is that, in cases where not all JavaScript code on the page will be executed, this technique allows you to only parse and evaluate the code you’re actually going to use.

By: broofa

broofa — Tue, 03 Nov 2009 13:38:51 +0000

‘Surprised there’s no mention of Google’s hosted JS libraries:

http://code.google.com/apis/ajaxlibs/

As more sites use those, the likelihood that there in the user’s browser cache increases, and completely circumvents many of the bandwidth/latency issues involved in lib loading.