jquery - Javascript match error - Invalid quantifier -

I get a strange error "invalid qualifier" ... can someone help me?

html

  & lt; Input type = "text" value = "5 + 5" id = "test" />  

JS

  up = {}; Up ['2'] = new array (); Up ['2'] ['CMD'] = '# (\ - | \ | | * | | / |) [0- 9] (, | [0- 9] |) (\ - | \ + | \ * | \ /) [0-9] #gi '; Var inp_val = $ ('# test'). Val (); If (inp_val.match (up ['2'] ['CMD'])) {$ ('body'). Append ('& lt; br / & gt; ok'); }  

In javascript, should be written as a regular expression

  Var re = / thepatterns / mod;  

i.e.

  ups = {}; Up ['2'] = new array (); Up ['2'] ['CMD'] = / (\ - | \ | | * | | / |) [0- 9] (, | [0- 9] |) (\ - | \ + | * | / / [[0-9] / gi;  

In addition, it simplified it as

  ups = {2: {cmd: / ([- + * / /)) Can be [, \ D]?) ([- + * \ /]) \ d / g}};  

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The reason for the invalid quantifier is that, unlike PHP, a \ is the result of an unfamiliar character without that character \ :

• JavaScript '\ p \ q' == 'pq'
• PHP '\ p \ Q '==' \\ p \\ q '

Therefore, your string will be defined as

 . + | * | / |) [0-9] (, | [0- 9] |) (- | + | * | /) [0- 9] #gi ' 

An invalid Reggae Because + (a quantifier) ​​is not before any pattern.