Question

I need a JS regular expression which should allow only the word having alphanumeric, dot and hyphen.

Let me know this is correct.

var regex =  /^[a-zA-Z_0-9/.-]+$/;

Answer 1

Almost. That will also allow underscores and slashes. Remove those from your range:

var regex =  /^[a-zA-Z0-9.-]+$/;

This will also not match the empty string. That may be what you want, but it also may not be what you want. If it’s not what you want, change + to *.