Give up if an image link is invalid

xray.js

@@ -12,12 +12,15 @@ document.addEventListener("DOMContentLoaded", e => {
         const baseInput = document.querySelector("#base-url").value;
         const overlayInput = document.querySelector("#overlay-url").value;
         
+        let success = true;
+
         try {
             let baseURL = new URL(baseInput)
             console.log(baseURL);
         } catch {
             document.querySelector("#base-url").value = "";
             document.querySelector("#base-url").placeholder = "Invalid URL...";
+            success = false;
         }
         try {
             let overlayURL = new URL(overlayInput)
@@ -25,8 +28,12 @@ document.addEventListener("DOMContentLoaded", e => {
         } catch {
             document.querySelector("#overlay-url").value = "";
             document.querySelector("#overlay-url").placeholder = "Invalid URL...";
+            success = false;
         }
 
+        if (!success) {
+            return;
+        }
         const overlayImg = document.querySelector("#overlay-img");
         const baseImg = document.querySelector("#base-img");