eslint/valid-typeof Correctness

✅ This rule is turned on by default.

🛠️ An auto-fix is available for this rule for some violations.

What it does

Enforce comparing typeof expressions against valid strings

Why is this bad?

It is usually a typing mistake to compare the result of a typeof operator to other string literals.

Example

// requireStringLiterals: false
// incorrect:
typeof foo === "strnig";
// correct:
typeof foo === "string";
typeof foo === baz;

// requireStringLiterals: true
// incorrect:
typeof foo === baz;

References

• Rule Source