/** * @typedef {Object} SpecialType - creates a new type named 'SpecialType' * @property {string} prop1 - a string property of SpecialType * @property {number} prop2 - a number property of SpecialType * @property {number=} prop3 - an optional number property of SpecialType * @prop {number} [prop4] - an optional number property of SpecialType * @prop {number} [prop5=42] - an optional number property of SpecialType with default */ /** @type {SpecialType} */ var specialTypeObject;