feat(Overlay): add lock-scroll prop (#6082)

src/overlay/index.tsx

@@ -1,5 +1,5 @@
 // Utils
-import { createNamespace, isDef } from '../utils';
+import { createNamespace, isDef, noop } from '../utils';
 import { inherit } from '../utils/functional';
 import { preventDefault } from '../utils/dom/event';
 
@@ -12,6 +12,7 @@ export type OverlayProps = {
   zIndex?: number | string;
   duration: number | string | null;
   className?: any;
+  lockScroll?: boolean;
   customStyle?: object;
 };
 
@@ -46,10 +47,10 @@ function Overlay(
         vShow={props.show}
         style={style}
         class={[bem(), props.className]}
-        onTouchmove={preventTouchMove}
+        onTouchmove={props.lockScroll ? preventTouchMove : noop}
         {...inherit(ctx, true)}
       >
-        {slots.default && slots.default()}
+        {slots.default?.()}
       </div>
     </transition>
   );
@@ -61,6 +62,10 @@ Overlay.props = {
   duration: [Number, String],
   className: null as any,
   customStyle: Object,
+  lockScroll: {
+    type: Boolean,
+    default: true,
+  },
 };
 
 export default createComponent<OverlayProps, OverlayEvents>(Overlay);