Get elements from page.evaluate in Puppeteer?

let elementsHendles = await page.evaluateHandle(() => document.querySelectorAll('a'));
let elements = await elementsHendles.getProperties();
let elements_arr = Array.from(elements.values());

Use page.evaluateHandle()

An API is : here

The function page.evaluate() can only return a serializable value, so it is not possible to return an element or NodeList back from the page environment using this method.

You can use page.$$() instead to obtain an ElementHandle array:

const nodes = await page.$$(`${selector} > *`); // selector children

If the length of the constant nodes is 0, then make sure you are waiting for the element specified by the selector to be added to the DOM with page.waitForSelector():

await page.waitForSelector(selector);