await page.goto('https://jandan.net/duan/page-94#comments', {
timeout: 10000,
waitUntil: 'domcontentloaded',
});
const commentBtn = '.tucao-btn';
let length = await page.evaluate(commentBtn => {
let btns = document.querySelectorAll(commentBtn);
btns.forEach(el => el.click());
return btns.length;
}, commentBtn);
console.log(length);