Post History

To fix `TypeError: Cannot read properties of undefined (reading 'close')`, remove the `const` in the following code, which ensures your `let browser` outside the block will be assigned if `browser.launch()` doesn't throw:

```diff
- const browser = await puppeteer.launch({
+ browser = await puppeteer.launch({
```

But if `browser.launch()` throws, then `let browser` will be undefined, so a throw is still possible in the `finally` block. Handle this in your `finally` block by using optional chaining:

```diff
- await browser.close();
+ await browser?.close();
```

---

Also, as you're seeing, the

```js
console.warn("Could not create a browser instance: ", err);
```

log is misleading, since you're clearly able to create a browser instance. This `catch` block will run if any errors throw within the main automation block, which could be more than just failing to create a browser instance. That's only the first line of the block. I would make it:

```diff
- console.warn("Could not create a browser instance: ", err);
+ console.error(err);
```

---

As for your other question, the following listener forwards all logs from the website console into your Node console:

```js
page.on('console', (msg) => console.log('DEBUG:', msg.text()) );
```

The output you're seeing is mostly harmless noise from the website. I generally wouldn't add this listener since most large sites spam the console with random resource loading failures like this.

Generally speaking, I recommend the following goto:

```js
await page.goto(url, {waitUntil: "domcontentloaded"});
```

which is least likely to get stuck and throw a loading timeout. If you're taking a screenshot, wait for all images to load manually before doing so (`"networkidle0"` can get stuck, as can the default `"load"` predicate).

The chunkbase site probably uses anti-botting, and headless mode makes bots much easier to detect. The default user agent basically says "I am a bot", so you can start by setting it to a normal mobile browser user agent. If that doesn't work, you can try the Puppeteer stealth plugin or other fingerprint obfuscating measures. Or use headful mode.