The provided code uses the logical OR operator (||) to return an object with a default property set to true if the left side (a null value) is falsy. In this case, the expression returns { default: true } because null is considered falsy in JavaScript.

Cell 4

console.log(null || {default: true})

/**
 * Returns a default object if the input is null or undefined.
 * @returns {Object} - The default object.
 */
function getDefaultObject() {
  // Use the || operator for its short-circuiting behavior.
  return null || { default: true };
}

// Example usage:
console.log(getDefaultObject());

Explanation

The provided code is a JavaScript expression that uses the logical OR operator (||) to return a value.

Breakdown

• null : The value to be evaluated on the left side of the operator.
• || : The logical OR operator, which returns the first "truthy" value it encounters.
• { default: true } : The value to be evaluated on the right side of the operator, and returned if the left side is falsy.

Output

The expression will return an object with the property default set to true, because null is considered falsy in JavaScript.