JSDocDemo.js

/**
 * @typedef {'github' | 'bitbucket' | 'gitlab'} ServiceType
 */

/**
 * @param {string} path
 * @param {number} depth
 * @param {{username: string | null, token: string | null, service: ServiceType}} userData
 * @returns {Promise<number>}
 */
function testThis(path, depth, userData) {
    /**
     * @type {string}
     */
    const test = path + depth;

    switch (userData.service) {
        case "github":
            return 2;
        case "bitbucket":
        default:
            return 1;
    }
}