Quoting the Ecma-262:

This standard specifies one departure from the grammar given in the Unicode
standard: The dollar sign ($)
and the underscore (_) are permitted anywhere in an identifier. The dollar
sign is intended for use only in
mechanically generated code.

Gabriel Gilini


On Fri, Jan 23, 2009 at 4:10 PM, kangax <kan...@gmail.com> wrote:

> On Jan 23, 10:11 am, Jan Hansen <j...@nhl-data.dk> wrote:
> > I've been in the same problematic situation as well. However, we managed
> > to use jQuerys noConflict mode in the 3'rd part component so that was
> > great - but two questions:
> >
> > 1)
> > Would it be possible to implement a noConflict mode in prototype? (why
> > isn't there one already?)
> Because the actual philosophy of prototype.js goes somewhat against
> such mode. There are quite few native and host objects being
> augmented. There are also quite few global properties being created/
> modified. Eliminating all of that would take a good portion of what
> prototype.js is all about. Such thing is also impossible to accomplish
> without breaking backwards compatibility. There are plans to change
> current approach in next major (backwards-incompatible) release but
> it's not clear when it will be done and how it will be done.
> >
> > 2)
> > Why use the "$" per default? is it "by nature" of some javascript thing
> > I havent realized - or is it just "by convention", aka could it have
> > been "P" or "£" just as well?
> `$` is just one of the characters allowed to be part of (and a first
> character) of `Identifier` (in other words, variable name) as per
> ECMAScript specs. Back in the days when libraries "picked it up", it
> was probably due to the fact that it looked distinguishable enough and
> short enough for such frequently-used functionality (querying element
> by id and/or extending element)
> [...]
> --
> kangax
> >

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