Using hash sign (#) as identifier/alias

Question

The $ sign is used by several libraries (jQuery, MooTools, Prototype).

Let say I have a Class called ProjectServices and wouldlike to create an alias like

var #PS = ProjectServices;

Wy is it not allowed to use # as alias or identifier in Javascript ?

3

because the spec says so. – zzzzBov Jan 06 '14 at 22:22

score 4 · Accepted Answer · answered Jan 06 '14 at 22:21

4

It's simply not allowed by basic JavaScript syntax, while $ is. Every programming language defines a syntax allowable for various kinds of symbols.

answered Jan 06 '14 at 22:21

Pointy

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Letters, numbers, '$', and '_' are the only allowed characters. – elimirks Jan 06 '14 at 22:21
3

@elimirks, [that's not quite right](http://stackoverflow.com/a/9337047/497418). – zzzzBov Jan 06 '14 at 22:24

score 1 · Answer 2 · answered Jan 06 '14 at 22:21

1

A JavaScript identifier must start with a letter, underscore (_), or dollar sign ($); subsequent characters can also be digits (0-9). Because JavaScript is case sensitive, letters include the characters "A" through "Z" (uppercase) and the characters "a" through "z" (lowercase).

Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Values,_variables,_and_literals

answered Jan 06 '14 at 22:21

zxqx

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You left out the part that says "Starting with Javascript 1.5..." – Robert Harvey Jan 06 '14 at 22:26

Using hash sign (#) as identifier/alias

2 Answers2