unicorn/no-typeof-undefined Pedantic
What it does
Disallow typeof comparisons with undefined.
Why is this bad?
Checking if a value is undefined by using typeof value === 'undefined' is needlessly verbose. It's generally better to compare against undefined directly. The only time typeof is needed is when a global variable potentially does not exists, in which case, using globalThis.value === undefined may be better.
Examples
Examples of incorrect code for this rule:
javascript
typeof foo === "undefined";Examples of correct code for this rule:
javascript
foo === undefined;