Filtering out 0-9 & dashes only?

Question

I would like to create a regexp that targets any characters in my string that isn't 0-9 (numeric) or - (dash). What is wrong with my below regexp?

Regex:

regex = '/^[0-9-]/g';

JS implementation:

$(this).val($(this).val().replace(regex, ''));

Answer 1

I think you meant for your ^ to be inside the character class. Also, regexes are not strings:

regex = /[^0-9-]/g;
$(this).val($(this).val().replace(regex, ''));

Answer 2

You need to put '^' inside the brackets and escape '-', it being a special char. Your regex should be

regex = /[^0-9\-]/g