use mutation query

js/customElements/newComment.js

@@ -105,7 +105,7 @@ class newComment extends HTMLElement {
                 }
 
                 var graphql = JSON.stringify({
-                    query: 'query($article: String!, $name: String!, $hCaptchaResponse: String!, $email: String!, $comment: String!) { newComment(article: $article, name: $name, email: $email, comment: $comment, hCaptchaResponse: $hCaptchaResponse)}',
+                    query: 'mutation($article: String!, $name: String!, $hCaptchaResponse: String!, $email: String!, $comment: String!) { newComment(article: $article, name: $name, email: $email, comment: $comment, hCaptchaResponse: $hCaptchaResponse)}',
                     variables: {
                         "article": pageName,
                         "name": nameInput.value,