[Webkit-unassigned] [Bug 50115] Please implement async=false for dynamic script loading (REGRESSION: LABjs is broken)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=50115





--- Comment #53 from Kyle Simpson <getify at gmail.com>  2010-12-30 12:52:51 PST ---
(in reply to comment #52)

@Antti-

The "async" attribute on a markup tag does something very important on top of parallel loading that a normal script tag without that attribute in markup will not get. It tells the browser "this script is totally independent and can EXECUTE as soon as possible, at any time. don't wait on any other scripts for it to execute, and don't make any other scripts wait on this one before they execute."

This is quite important, but it's distinct and in addition to the parallel loading that all modern browsers have now figured out.

It's the difference between loading and execution that's at stake. Some scripts (like Google Analytics, for instance) are totally independent of all other scripts, and thus I not only want good parallel loading behavior but I ALSO want to have its execution happen independently (that is, not waiting on or blocking) of other scripts.

Again, it feels like your underlying question is actually: why is a dynamic script element behaving like an "async" script element? 

The answer is legacy compat and because the spec says to.

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