Disable Unnecessary escape character: \/ no-useless-escape
I have this regex of mine that will check the string if it contains link or url (i.e. https://eslint.org/docs/rules/no-useless-escape)
. Using this regex /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig
, I've encountered and error while running my test cases in react about Unnecessary escape character: \/ no-useless-escape
. How to disable this eslint-error in order for me to proceed with my test case and use the regex.
Appreciate for any help!
You can use ESLint and try adding either of the things:-
-
//eslint-disable-line
on the line to disable warnings. -
//eslint-disable-next-line
to line before to disable warnings.
See from docs of ESLint, Disabling Rules with Inline Comments.
To disable all rules on a specific line, use a line or block comment in one of the following formats:
alert('foo'); // eslint-disable-line // eslint-disable-next-line alert('foo'); /* eslint-disable-next-line */ alert('foo'); alert('foo'); /* eslint-disable-line */
You can disable warnings in entire file by adding /* eslint-disable */
at the top of the file.
To disable rule warnings in an entire file, put a
/* eslint-disable */
block comment at the top of the file:/* eslint-disable */ alert('foo');
It's the \/
in [-A-Z0-9+&@#\/%?=~_|!:,.;]
and [-A-Z0-9+&@#\/%=~_|]
(NOT the ones in :\/\/
). Most characters do not have to be escaped within a character class (square brackets). This should be equivalent: /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#/%?=~_|!:,.;]*[-A-Z0-9+&@#/%=~_|])/ig
See https://www.regular-expressions.info/charclass.html for more info, but the relevant part:
In most regex flavors, the only special characters or metacharacters inside a character class are the closing bracket ], the backslash , the caret ^, and the hyphen -. The usual metacharacters are normal characters inside a character class, and do not need to be escaped by a backslash. To search for a star or plus, use [+*]. Your regex will work fine if you escape the regular metacharacters inside a character class, but doing so significantly reduces readability.
//eslint-disable-next-line
place this above the line of code
OR
/*eslint no-undef: 0*/
place this on the first line of the file(or first line of the script tag) this would make eslint disabled on the whole file
You can also use
/* eslint-disable no-useless-escape */
to disable rule for entire script file.
\
gives error from below code in my NodeJS typescript
project, code editor is VS Code -
Code -
if (!(/^[\-0-9a-zA-Z\.\+_]+@[\-0-9a-zA-Z\.\+_]+\.[a-zA-Z]{2,}$/).test(String(req.body.email))) { ... }
Error -
Unnecessary escape character: \+. (eslintno-useless-escape)
Solution -
//eslint-disable-next-line
Final code -
//eslint-disable-next-line
if (!(/^[\-0-9a-zA-Z\.\+_]+@[\-0-9a-zA-Z\.\+_]+\.[a-zA-Z]{2,}$/).test(String(req.body.email))) { ... }