View difference between Paste ID: LQAekqik and YhXRZpc3

 // @namespace    http://tampermonkey.net/
 // @version      0.1
 // @description  try to take over the world!
 // @author       You
 // @include      http*://prnt.sc/*
 // @grant        none
 // ==/UserScript==
 
 (function() {
     const chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
     const randomLength = 4;
     const urlBase = 'https://prnt.sc/mp';
 
     function randomPage() {
       let randomPage = [];
       for (let i = 0; i < randomLength; i++) {
         randomPage[i] = chars[Math.floor(Math.random() * chars.length)]
       }
       return urlBase + randomPage.join('');
     }
     function getRandomPage() {
         const r = randomPage();
         this.innerText = r;
         fetch(r).then(res => res.text())
             .then(text => {
                 let src = text.match(/class="no-click screenshot-image" src="(.*?)"/)[1]
-                document.getElementById("screenshot-image").src = src
+                document.getElementById("screenshot-image").src = src;
                 window.history.pushState({}, "", r);
             })
 
     }
     window.onload = () => {
         const place = document.getElementsByClassName("image-constrain")[0];
         const button = document.createElement("button");
         const block = document.createElement("div");
         block.classList.add("page-constrain");
         button.innerText = "Get Random";
         button.classList.add("image__title");
         button.onclick = getRandomPage;
         block.appendChild(button);
         place.prepend(block);
     }
 })();