isBoolean() function

Determines whether a value is a boolean.

Signature

export declare function isBoolean(value: unknown): boolean;

Parameters

Parameter	Type	Description
value	unknown	The value to test.

Returns

boolean

true if the value is a boolean, false otherwise.

Remarks

Tests for primitive boolean values (true or false). Useful when validating configuration options or parsing JSON where boolean flags need to be distinguished from truthy/falsy values.

Only returns true for the primitive boolean values true and false, not for boolean objects created with new Boolean().

Note: This does not check for truthy or falsy values - it only returns true for actual boolean primitives. Use standard JavaScript truthiness checks for conditional logic.

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