chore: ts optimization (#40258)

components/button/buttonHelpers.tsx

@@ -8,7 +8,7 @@ export function isString(str: any) {
   return typeof str === 'string';
 }
 
-export function isUnBorderedButtonType(type: ButtonType | undefined) {
+export function isUnBorderedButtonType(type?: ButtonType) {
   return type === 'text' || type === 'link';
 }
 

components/input/Input.tsx

@@ -39,7 +39,7 @@ export function resolveOnChange<E extends HTMLInputElement | HTMLTextAreaElement
     | React.ChangeEvent<E>
     | React.MouseEvent<HTMLElement, MouseEvent>
     | React.CompositionEvent<HTMLElement>,
-  onChange: undefined | ((event: React.ChangeEvent<E>) => void),
+  onChange?: (event: React.ChangeEvent<E>) => void,
   targetValue?: string,
 ) {
   if (!onChange) {

components/table/demo/dynamic-settings.tsx

@@ -92,12 +92,12 @@ const App: React.FC = () => {
   const [showfooter, setShowFooter] = useState(true);
   const [rowSelection, setRowSelection] = useState<TableRowSelection<DataType> | undefined>({});
   const [hasData, setHasData] = useState(true);
-  const [tableLayout, setTableLayout] = useState(undefined);
+  const [tableLayout, setTableLayout] = useState();
   const [top, setTop] = useState<TablePaginationPosition | 'none'>('none');
   const [bottom, setBottom] = useState<TablePaginationPosition>('bottomRight');
   const [ellipsis, setEllipsis] = useState(false);
   const [yScroll, setYScroll] = useState(false);
-  const [xScroll, setXScroll] = useState<string | undefined>(undefined);
+  const [xScroll, setXScroll] = useState<string>();
 
   const handleBorderChange = (enable: boolean) => {
     setBordered(enable);