correct sort order of css properties

mocking of fetch api only once in setupTests

src/elements/VideoContainer/VideoContainer.js

@@ -3,6 +3,9 @@ import Preview from "../Preview/Preview";
 import style from "./VideoContainer.module.css"
 
 class VideoContainer extends React.Component {
+    // stores current index of loaded elements
+    loadindex = 0;
+
     constructor(props, context) {
         super(props, context);
 
@@ -14,9 +17,6 @@ class VideoContainer extends React.Component {
         };
     }
 
-    // stores current index of loaded elements
-    loadindex = 0;
-
     componentDidMount() {
         document.addEventListener('scroll', this.trackScrolling);