How to show alt images as text in VK?

Question

JavaScript

There is a need to view emoji emoticon codes in VKontakte posts. For example, here is a post:
vk.com/wall-124855981_31288
In the page code, the codes we need are written in the Alt attributes. Run the script via Tampermonkey:

$('img').each(function () {
  $(this).replaceWith($('<span>').html($(this).attr('alt')));
});

Unfortunately it doesn't work. Can you tell me what needs to be changed in the script so that alt-"text" is shown instead of the image?
PS In javascript/jquery I am a complete zero)

Answer 1

$('img').each(function () {
  $(this).replaceWith('<span>'+$(this).attr('alt')+'</span>');
});