Escape forward slash in jscript regexp character class?

Question

I have a regular expression testing for numbers(0-9) and/or forward slashes (/). It looks like this:

/^[0-9/]+$/i.test(value)


        

Answer 1

The standard clearly says you can put anything unescaped in a character class except \, ] and newline:

RegularExpressionClassChar ::
   RegularExpressionNonTerminator but not ] or \
   RegularExpressionBackslashSequence

RegularExpressionNonTerminator ::
    SourceCharacter but not LineTerminator

( http://es5.github.com/#x7.8.5 ). No need to escape /.

On the other side, I personally would escape everything when in doubt, just to make less smart parsers happy.