[Greasemonkey] Dynamically loading Prototype

[chris feldmann]

On 12/21/05, Rich Manalang <rich.manalang at gmail.com> wrote:
> Hi all.  I've read about the pitfalls with unsafeWindow but I wanted to get
> your opinions.  I'd like to dynamically create a script reference to the
> prototype.js library on a trusted server to make use of the convenience
> functions.  The questions is... is this kosher... should we distributing
> scripts that do this?  From what I understand, as long as we avoid passing
> GM_* references to unsafeWindow we should be ok, right?
>
> function waitForProto() {
>     // waits for the prototype lib to load before continuing with the script
>     if (typeof unsafeWindow.Prototype=='undefined')
>         window.setTimeout(waitForProto, 1000);
>     else
>         alert(unsafeWindow.Prototype.Version);
>         callMyCode();
> }
> function loadProto() {
>         var proto = document.createElement("script");
>         proto.type = "text/javascript";
>         proto.src = "http://some.trusted.server/prototype.js";
>         document.getElementsByTagName("head")[0].appendChild(proto);
>         waitForProto();
> }
> window.addEventListener("load", loadProto(), false);
>
>

There's code in the pipe for the next version to provide this
functionality; it's already written, actually, and you can patch
greasemonkey with it:

http://www.freegarethandrew.org/mediawiki/index.php?title=GreasemonkeyImports#Code