I am trying out Puppeteer. This is a sample code that you can run on: https://try-puppeteer.appspot.com/
The problem is this code is returning an array of empty objects:
[{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}]
Am I making a mistake?
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto('https://reddit.com/');
let list = await page.evaluate(() => {
return Promise.resolve(Array.from(document.querySelectorAll('.title')));
});
console.log(JSON.stringify(list))
await browser.close();
The values returned from evaluate function should be json serializeable. https://github.com/GoogleChrome/puppeteer/issues/303#issuecomment-322919968
the solution is to extract the href values from the elements and return it.
await this.page.evaluate((sel) => {
let elements = Array.from(document.querySelectorAll(sel));
let links = elements.map(element => {
return element.href
})
return links;
}, sel);