is-number
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
@alwatr/is-number
A simple utility to Check the value is number or can convert to a number, for example string ' 123 ' can be converted to 123.
parseint
An ES-spec-compliant `parseInt` shim/polyfill/replacement that works as far down as ES3
multi-integer-range
Parses and manipulates multiple comma-separated integer ranges (eg 1-3,8-10)