if a site uses js-emoji you can pass the text into replaceEmoji() and get the text with the correct Unicode Emojis back
var reverseJsEmoji = require("reverse-js-emoji");
console.log(reverseJsEmoji.replaceEmoji('Wow it works very well. <span class="emoji-outer emoji-sizer"><span class="emoji-inner emoji1f62f"></span></span>'));
"Wow it works very well. 😯"because the library uses matchAll you need at least Nodejs V12