cookieContainer shows inconsistent behaviour

[garysassano]

I've been testing cookieContainer across various websites in multiple scenarios, and in my experience, it's highly unreliable. The results from the getCookies() method consistently differ from the actual cookies present after visiting a page in a real browser.

index.ts

import { Browser } from "happy-dom";

const browser = new Browser();
const page = browser.newPage();

try {
  const url = "https://www.example.com/";
  console.log(`Navigating to ${url}...`);
  await page.goto(url);

  const cookies = await page.context.cookieContainer.getCookies(new URL(url));
  console.log("\n--- Cookies ---");
  console.log(JSON.stringify(cookies, null, 2));
  console.log("---------------");
} catch (error) {
  console.error("Error occurred:", error);
} finally {
  console.log("\nClosing browser...");
  await browser.close();
  console.log("Browser closed.");
}

First run

Navigating to https://www.amazon.com/...

--- Cookies ---
[
  {
    "key": "skin",
    "originURL": "https://www.amazon.com/",
    "value": "noskin",
    "domain": ".amazon.com",
    "path": "/",
    "expires": null,
    "httpOnly": false,
    "secure": false,
    "sameSite": "Lax"
  }
]
---------------

Closing browser...
Browser closed.

Second run

Navigating to https://www.amazon.com/...

--- Cookies ---
[
  {
    "key": "session-id",
    "originURL": "https://www.amazon.com/",
    "value": "135-2546199-2440702",
    "domain": ".amazon.com",
    "path": "/",
    "expires": "2026-04-11T00:40:36.000Z",
    "httpOnly": false,
    "secure": true,
    "sameSite": "Lax"
  },
  {
    "key": "session-id-time",
    "originURL": "https://www.amazon.com/",
    "value": "2082787201l",
    "domain": ".amazon.com",
    "path": "/",
    "expires": "2026-04-11T00:40:36.000Z",
    "httpOnly": false,
    "secure": true,
    "sameSite": "Lax"
  },
  {
    "key": "i18n-prefs",
    "originURL": "https://www.amazon.com/",
    "value": "USD",
    "domain": ".amazon.com",
    "path": "/",
    "expires": "2026-04-11T00:40:36.000Z",
    "httpOnly": false,
    "secure": false,
    "sameSite": "Lax"
  },
  {
    "key": "sp-cdn",
    "originURL": "https://www.amazon.com/",
    "value": "\"L5Z9:IT\"",
    "domain": ".amazon.com",
    "path": "/",
    "expires": "2026-04-11T00:40:36.000Z",
    "httpOnly": true,
    "secure": true,
    "sameSite": "Lax"
  },
  {
    "key": "skin",
    "originURL": "https://www.amazon.com/",
    "value": "noskin",
    "domain": ".amazon.com",
    "path": "/",
    "expires": null,
    "httpOnly": false,
    "secure": false,
    "sameSite": "Lax"
  }
]
---------------

Closing browser...
Browser closed.

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