Boolean Object

The Boolean object is a wrapper for boolean primitive values. It provides a way to create boolean objects, though they are rarely used because primitive booleans are more efficient. Any object, including a Boolean object, is truthy even if it wraps false.

Key Points

• Primitive booleans: true, false.
• Boolean constructor: new Boolean(value) returns an object.
• Avoid using Boolean objects in conditionals because they are always truthy.

Code Example

const boolPrimitive = true;
const boolObject = new Boolean(false);

console.log(typeof boolPrimitive); // "boolean"
console.log(typeof boolObject); // "object"
console.log(boolPrimitive === boolObject); // false

// Dangerous: boolObject is truthy!
if (boolObject) {
  console.log("This will execute!"); // this runs
}