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javascriptregexstringparentheses

js regexp variable parenthesis

So I have a function that receives an argument (namedc), then I create a regular expression like so: regC = new RegExp(c,'gi'). Now this works fine for most characters, but my function can also receive a ( or other paretheses. This cases create an error. I tried this: regC = '/['+c+']/gi', but it didn't work

Solution

  • Pass the character set '['+c+']' to RegExp functions as

    regC = new RegExp('['+c+']','gi');

    Because 

    regC = '/['+c+']/gi'

    Makes a string