type: optimization React.useRef type (#38388)

components/_util/ActionButton.tsx

@@ -22,7 +22,7 @@ function isThenable(thing?: PromiseLike<any>): boolean {
 
 const ActionButton: React.FC<ActionButtonProps> = props => {
   const clickedRef = React.useRef<boolean>(false);
-  const ref = React.useRef<any>();
+  const ref = React.useRef<HTMLInputElement>(null);
   const [loading, setLoading] = useState<ButtonProps['loading']>(false);
   const { close } = props;
   const onInternalClose = (...args: any[]) => {
@@ -30,10 +30,11 @@ const ActionButton: React.FC<ActionButtonProps> = props => {
   };
 
   React.useEffect(() => {
-    let timeoutId: any;
+    let timeoutId: NodeJS.Timer | null = null;
     if (props.autoFocus) {
-      const $this = ref.current as HTMLInputElement;
+      timeoutId = setTimeout(() => {
-      timeoutId = setTimeout(() => $this.focus());
+        ref.current?.focus();
+      });
     }
     return () => {
       if (timeoutId) {

components/back-top/index.tsx

@@ -56,7 +56,7 @@ const BackTop: React.FC<BackTopProps> = props => {
   });
 
   const ref = React.createRef<HTMLDivElement>();
-  const scrollEvent = React.useRef<any>();
+  const scrollEvent = React.useRef<ReturnType<typeof addEventListener>>(null);
 
   const getDefaultTarget = () =>
     ref.current && ref.current.ownerDocument ? ref.current.ownerDocument : window;

components/upload/Upload.tsx

@@ -60,7 +60,7 @@ const InternalUpload: React.ForwardRefRenderFunction<unknown, UploadProps> = (pr
 
   const [dragState, setDragState] = React.useState<string>('drop');
 
-  const upload = React.useRef<any>();
+  const upload = React.useRef<RcUpload>(null);
 
   warning(
     'fileList' in props || !('value' in props),
@@ -276,7 +276,7 @@ const InternalUpload: React.ForwardRefRenderFunction<unknown, UploadProps> = (pr
             item.status = 'removed';
           }
         });
-        upload.current?.abort(currentFile);
+        upload.current?.abort(currentFile as RcFile);
 
         onInternalChange(currentFile, removedFileList);
       }

components/upload/UploadList/ListItem.tsx

@@ -82,14 +82,15 @@ const ListItem = React.forwardRef(
 
     // Delay to show the progress bar
     const [showProgress, setShowProgress] = React.useState(false);
-    const progressRafRef = React.useRef<any>();
+    const progressRafRef = React.useRef<NodeJS.Timer | null>(null);
     React.useEffect(() => {
       progressRafRef.current = setTimeout(() => {
         setShowProgress(true);
       }, 300);
-
       return () => {
-        window.clearTimeout(progressRafRef.current);
+        if (progressRafRef.current) {
+          clearTimeout(progressRafRef.current);
+        }
       };
     }, []);