I have this regex of mine that will validate phone number (i.e. +1 (417) 230-0718). Using this regex /^[\+]?[(]?[0-9]{3}[)]?[-\s\.]?[0-9]{3}[-\s\.]?[0-9]{4,6}$/im, I've encountered and error while running my test cases in next about Unnecessary escape character: +. How to disable this eslint-error in order for me to proceed with my test case and use the regex.
Appreciate for any help!
Your example phone number does not match your original regex and that contains multiple unnecessary escapes.
To answer your initial question first: in a [] part, you don't need to escape characters - the only character with a special meaning is the ^, and that also only has a special meaning as the first character inside [] so you can put it further back. Also you don't need [] for only one character - then the escaped version is better.
Next to your regex not matching your example phone number: You are missing the international prefix after the + sign in the beginning.
I would rewrite your regex to the following:
/^(?:\+\d{1,3}[-\s.]?)?\(?[0-9]{3}\)?[-\s.]?[0-9]{3}[-\s.]?[0-9]{4,6}$/m
You don't need the i flag as there are no upper/lower case digits.
This updated regex allows for an optional 1 to 3 digit international prefix, but that has to be preceded with a +