Reports a usage of an equality operator that may cause unexpected type coercions. Suggests replacing == and != with type-safe equality operators === and !==.

Depending on the option selected, one of the following cases will be reported:

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 with 0, '', null, true, false, or undefined.