Overview

Primitive validators ensure that a value is one of JavaScript’s built‑in primitive types and meets specific criteria. They return simple booleans, never throw, and never mutate input.

• validateBigInteger: Validates whether a value is a bigint primitive.
• validateBoolean: Validates whether a value is a boolean.
• validateFiniteNumber: Validates whether a value is a finite number.
• validateInteger: Validates whether a value is an integer.
• validateNegativeInteger: Validates whether a value is a negative integer.
• validateNegativeNumber: Validates whether a value is a negative number.
• validateNonEmptyString: Validates whether a value is a non‑empty string.
• validateNonNegativeInteger: Validates whether a value is a non‑negative integer (zero or positive).
• validateNonNegativeNumber: Validates whether a value is a non‑negative number (zero or positive).
• validateNull: Validates whether a value is null.
• validateNumber: Validates whether a value is a number.
• validateNumberRange: Validates whether a value is a number within a specified inclusive range.
• validatePositiveInteger: Validates whether a value is a positive integer.
• validatePositiveNumber: Validates whether a value is a positive number.
• validateSafeInteger: Validates whether a value is a safe integer (between $-(2^{53} - 1)$ and $2^{53} - 1$).
• validateString: Validates whether a value is a string.
• validateStringLength: Validates whether a value is a string whose length falls within a specified inclusive range.
• validateSymbol: Validates whether a value is a symbol.
• validateUndefined: Validates whether a value is undefined.

All primitive validators are pure, predictable, and safe to use before complex data processing or transformation.