ant-design-vue/components/vc-trigger/Popup/Mask.tsx

import { Transition } from 'vue';
import type { TransitionNameType, AnimationType } from '../interface';
import { getMotion } from '../utils/motionUtil';

export interface MaskProps {
  prefixCls: string;
  visible?: boolean;
  zIndex?: number;
  mask?: boolean;
  maskAnimation?: AnimationType;
  maskTransitionName?: TransitionNameType;
}

export default function Mask(props: MaskProps) {
  const { prefixCls, visible, zIndex, mask, maskAnimation, maskTransitionName } = props;

  if (!mask) {
    return null;
  }

  let motion = {};

  if (maskTransitionName || maskAnimation) {
    motion = getMotion({
      prefixCls,
      transitionName: maskTransitionName,
      animation: maskAnimation,
    });
  }

  return (
    <Transition appear {...motion}>
      <div v-if={visible} style={{ zIndex }} class={`${prefixCls}-mask`} />
    </Transition>
  );
}
Mask.displayName = 'Mask';