Reports usages of JavaScript equality operators which may cause unexpected type coercions.
It is considered a good practice to use the type-safe equality operators === and !==
instead of their regular counterparts == and !=.
Depending on the option selected, this will either highlight:
-
All usages of == and != operators.
-
All usages except comparison with null. Some code styles allow using x == null as a replacement for
x === null || x === undefined.
-
Only suspicious expressions, such as: == or != comparisons
to 0, '',
null, true,
false, or undefined.