Dave's example became more clear when I realized that attr is the name
of a jquery function, and he is just caling it from the jquery object
via indexing instead of the normal "."
jQuery["attr"]("id") is the same as jQuery.attr("id")
where jQuery is any $(...) expression.
eval isn't needed here, you want your method to be executed at some
time, bind it to a click or just run it inside the chain via each.
$('#xyz').callMethod("hide();document.location.href='new url'")
might translate into
$('#xyz').bind('click',function(){$(this).hide();document.location.href='new
url'})
On 1/16/07, Antonio Collins <[EMAIL PROTECTED]> wrote:
> I don't quite follow your example: jQuery["attr"]("id")
>
> I assume this is what you're speaking of: $("#identifier")["attr"]("id")
>
> If so, is this not equivalent to $("#identifer")["id"]? Also, ["attr"] does
> not appear to provide access to methods so it is not a replacement for
> object['method-name'].call( object, parm, ... );
>
> I realize that .callMethod() could be rewritten as:
> jQuery.fn.callMethod = function( method )
> {
> try {
> return eval("this."+ method );
> }
> catch (e) {
> return this;
> }
> }
>
> But we bar the use of eval() and consider it a security risk (or at least a
> wildcard that we don't want to deal with). Using eval() the following could
> be executed: $('#xyz').callMethod("hide();document.location.href='new url'")
> .callMethod() using the parsing technique at least ensures that any
> execution is limited to methods on the current jQuery collection.
>
> The parameter passing deficiencies could be addressed with a bit morecode,
> but for our purposes number conversion is sufficient.
>
>
> -----Original Message-----
> From: Dave Methvin [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, January 16, 2007 5:39 PM
> To: 'jQuery Discussion.'
> Subject: Re: [jQuery] .callMethod( method )
>
> > I don't know if jQuery already has a way to do this (or if anyone else
> > would find it useful), but here's a simple extension to call a method
> > (with or with
> > parameters) via a string.
>
> Javascript lets you call a method directly with a string:
> jQuery["attr"]("id") gets the id for example. Instead of passing a string of
> arguments and parsing it you could just eval the attribute in the examples
> you gave. Ad-hoc parsing often will get you into trouble; for example the
> code you have will not process arglists that have strings with embedded
> commas.
>
>
>
>
>
> _______________________________________________
> jQuery mailing list
> discuss@jquery.com
> http://jquery.com/discuss/
>
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