chore: improve jsdoc in cookies (#3478)

Author: Uzlopak

lib/web/cookies/index.js

@@ -9,14 +9,14 @@ const { Headers } = require('../fetch/headers')
  * @typedef {Object} Cookie
  * @property {string} name
  * @property {string} value
- * @property {Date|number|undefined} expires
- * @property {number|undefined} maxAge
- * @property {string|undefined} domain
- * @property {string|undefined} path
- * @property {boolean|undefined} secure
- * @property {boolean|undefined} httpOnly
- * @property {'Strict'|'Lax'|'None'} sameSite
- * @property {string[]} unparsed
+ * @property {Date|number} [expires]
+ * @property {number} [maxAge]
+ * @property {string} [domain]
+ * @property {string} [path]
+ * @property {boolean} [secure]
+ * @property {boolean} [httpOnly]
+ * @property {'Strict'|'Lax'|'None'} [sameSite]
+ * @property {string[]} [unparsed]
  */
 
 /**
@@ -29,6 +29,8 @@ function getCookies (headers) {
   webidl.brandCheck(headers, Headers, { strict: false })
 
   const cookie = headers.get('cookie')
+
+  /** @type {Record<string, string>} */
   const out = {}
 
   if (!cookie) {

lib/web/cookies/parse.js

@@ -9,7 +9,7 @@ const assert = require('node:assert')
  * @description Parses the field-value attributes of a set-cookie header string.
  * @see https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-rfc6265bis#section-5.4
  * @param {string} header
- * @returns if the header is invalid, null will be returned
+ * @returns {import('./index').Cookie|null} if the header is invalid, null will be returned
  */
 function parseSetCookie (header) {
   // 1. If the set-cookie-string contains a %x00-08 / %x0A-1F / %x7F