javascript - Puppeteer - page.$$('').length returns undefined - Stack Overflow

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I was having errors with my code, so i tried to log the value in the erroneous code. So i did:

const read = await page.$$('.Ns6lhs9 _gfh3').length;

Then i console.log(read);

For some reason i get undefined although there are elements with class name 'Ns6lhs9 _gfh3' in the HTML

I was having errors with my code, so i tried to log the value in the erroneous code. So i did:

const read = await page.$$('.Ns6lhs9 _gfh3').length;

Then i console.log(read);

For some reason i get undefined although there are elements with class name 'Ns6lhs9 _gfh3' in the HTML

• javascript
• node.js
• async-await
• puppeteer

Share Improve this question Follow asked Jun 5, 2018 at 16:03 user1584421user1584421 3,9031212 gold badges5757 silver badges9898 bronze badges 1

• Possible duplicate of Accessing the await-ed value inline (JS)? – Heretic Monkey Commented Jun 5, 2018 at 16:19

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2 Answers 2

Sorted by: Reset to default 5

$$ returns a promise of an element, while length is not a promise, it's actual value.

It should be:

const read = (await page.$$('.Ns6lhs9._gfh3')).length;

I've had a similar issue with getting 0 when counting elements using CSS selector. I tried xpath selector instead and for some reason it did work.

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