.

.idea/dataSources.local.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="dataSourceStorageLocal" created-in="IU-261.25134.95">
+  <component name="dataSourceStorageLocal" created-in="IU-253.32098.101">
     <data-source name="articles" uuid="315cb5c9-2b0f-435b-b602-59823b160908">
       <database-info product="SQLite" version="3.51.1" jdbc-version="4.2" driver-name="SQLite JDBC" driver-version="3.51.1.0" dbms="SQLITE" exact-version="3.51.1" exact-driver-version="3.51">
         <identifier-quote-string>&quot;</identifier-quote-string>

content/showArticle.php

@@ -457,6 +457,18 @@ if ($replyAuthor === null) {
                 <button type="submit" class="button">
                     Kommentar senden
                 </button>
+
+                <p
+                        id="comment-loading"
+                        class="comment-loading"
+                        role="status"
+                        aria-live="polite"
+                        hidden
+                >
+                    <span class="comment-spinner" aria-hidden="true"></span>
+                    Kommentar wird gesendet …
+                </p>
+
             </form>
         <?php else: ?>
             <div class="comment-login-hint">

css/main.css

@@ -226,3 +226,33 @@ h1 {
     text-decoration: none;
     box-sizing: border-box;
 }
+.comment-loading {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    margin-top: 10px;
+}
+
+.comment-loading[hidden] {
+    display: none;
+}
+
+.comment-spinner {
+    width: 16px;
+    height: 16px;
+    border: 2px solid #cbd5e1;
+    border-top-color: #1f2937;
+    border-radius: 50%;
+    animation: comment-spinner-rotation 0.8s linear infinite;
+}
+
+@keyframes comment-spinner-rotation {
+    to {
+        transform: rotate(360deg);
+    }
+}
+
+#comment-form button[type="submit"]:disabled {
+    cursor: wait;
+    opacity: 0.65;
+}

js/comments.js

@@ -11,7 +11,19 @@ document.addEventListener("DOMContentLoaded", function () {
     const parentCommentInput = document.getElementById("parent-comment-id");
     const replyInfo = document.getElementById("reply-info");
 
-    if (!form || !commentsList || !commentContent || !parentCommentInput) {
+    const submitButton = form
+        ? form.querySelector('button[type="submit"]')
+        : null;
+
+    const loadingMessage = document.getElementById("comment-loading");
+
+    if (
+        !form
+        || !commentsList
+        || !commentContent
+        || !parentCommentInput
+        || !submitButton
+    ) {
         return;
     }
 
@@ -53,6 +65,23 @@ document.addEventListener("DOMContentLoaded", function () {
     form.addEventListener("submit", function (event) {
         event.preventDefault();
 
+        /*
+         * Verhindert einen erneuten Submit, während der vorherige
+         * Kommentar noch gespeichert wird.
+         */
+        if (submitButton.disabled) {
+            return;
+        }
+
+        const originalButtonText = submitButton.textContent;
+
+        submitButton.disabled = true;
+        submitButton.textContent = "Wird gesendet …";
+
+        if (loadingMessage) {
+            loadingMessage.hidden = false;
+        }
+
         const formData = new FormData(form);
         const parentCommentId = parentCommentInput.value;
 
@@ -269,6 +298,14 @@ document.addEventListener("DOMContentLoaded", function () {
             .catch(function (error) {
                 console.error(error);
                 alert("Kommentar konnte nicht gesendet werden.");
+            })
+            .finally(function () {
+                submitButton.disabled = false;
+                submitButton.textContent = originalButtonText;
+
+                if (loadingMessage) {
+                    loadingMessage.hidden = true;
+                }
             });
     });