I can't use map function in the right way within google apps script while scraping two fields—movie name and image— from a

But since you aren't returning anything, just use each as mentioned by Sysix.

Note:

• For some reason, execution doesn't end if I return both values into result when using map and trying to log result.
• I tested another way to store the data and the script below worked.

var result = [];
container.each((index, item) => {
  const movieName = $(item).find('a.browse-movie-title').text();
  const movieImage = $(item).find('img.img-responsive').attr('src');
  result.push([movieName, movieImage]);
});
console.log(result);