I would like to know how to use $$eval from Puppeteer - node.js

Question

I can not use $$ eval well.
(async() => {
const browser = await puppeteer.launch({ executablePath: chrome ,args: [chromeArgs]});
const page = await browser.newPage();
await page.goto('https://www.example.com/', {waitUntil: "domcontentloaded"});
var links = await page.evaluate(() => {
var hreflist = [];
var tags = document.querySelectorAll("p");
Array.prototype.forEach.call(tags, (tag)=>{
hreflist.push(tag.textContent);
});
return hreflist;
});
console.log(util.inspect(links, false, null));
browser.close();
})();
I would like to do the same thing as the source code written above.
(async() => {
const browser = await puppeteer.launch({ executablePath: chrome ,args: [chromeArgs]});
const page = await browser.newPage();
await page.goto('https://www.example.com/', {waitUntil: "domcontentloaded"});
var links = await page.$$eval('p', list => {
list.map(data => {
data.textContent
})
});
console.log(util.inspect(links, false, null));
browser.close();
})();
The execution result of $$eval() is undefined.
https://pptr.dev/#?product=Puppeteer&version=v1.10.0&show=api-pageevalselector-pagefunction-args
I saw the official document.
However, we can not confirm the problem.

Answer 1

You forgot to return the value. this will work
var links = await page.$$eval('p', list => list.map(data => data.textContent));