입니다.
또한
가 있으므로 replace를 사용하여 생략합니다.
스크립트: document.getElementsByClassName('fn-wlyrics fn-content')[0].innerHTML.replace(/\<br\>/g,"")결과

4. 이제 index.js를 작성합니다. 가사는 파일에 저장합니다.

index.js

const puppeteer = require('puppeteer');
const fs = require('fs');

(async()=>{
  const browser=await puppeteer.launch({headless:true});
  const page=await browser.newPage();

  await page.goto('https://mp3.zing.vn/zing-chart-tuan/bai-hat-US-UK/IWZ9Z0BW.html');
  const songs = await page.evaluate(() => {
    let songs = document.getElementsByClassName('e-item');
    songs = [...songs];
    let array = songs.map(song => ({
        title: song.getElementsByClassName('txt-primary _trackLink')[0].innerHTML.trim(),
        url: song.getElementsByClassName('txt-primary _trackLink')[0].href
    }));
    return array;
  });

  for(let song of songs){
    await page.goto(song.url);
    let lyric = await page.evaluate(()=>{
      const evaluatedLyric = document.getElementsByClassName('fn-wlyrics fn-content')[0];
      // 歌詞はいつもあるわけではないので、条件をチェック
      if (evaluatedLyric !== undefined) {
        return evaluatedLyric.innerHTML.replace(/\<br\>/g,"");
      } else return "歌詞無し";
    });
    await fs.writeFile(`songs/${song.title}.txt`,lyric,function(err){
      if(err) throw err;
      console.log("取得: "+song.title);
    });
  }
  await browser.close();
})();

요약