vue3通过父子传值实现弹框功能

<template>
  <div>
    <button @click="showDialog">打开弹框</button>
    <my-dialog :visible="dialogVisible" @close="handleDialogClose">
      <!-- 弹框内容 -->
    </my-dialog>
  </div>
</template>
 
<script>
import MyDialog from './MyDialog.vue'
 
export default {
  components: {
    MyDialog
  },
  data() {
    return {
      dialogVisible: false
    }
  },
  methods: {
    showDialog() {
      this.dialogVisible = true
    },
    handleDialogClose() {
      this.dialogVisible = false
    }
  }
}
</script>

<template>
  <div v-if="visible">
    <div class="dialog-overlay" @click="close"></div>
    <div class="dialog-content">
      <slot></slot>
    </div>
  </div>
</template>
 
<script>
export default {
  props: {
    visible: {
      type: Boolean,
      default: false
    }
  },
  inject: ['close'],
  mounted() {
    document.body.style.overflow = 'hidden'
  },
  beforeUnmount() {
    document.body.style.overflow = ''
  }
}
</script>

// 父组件
<template>
  <div>
    <button @click="openModal">打开弹框</button>
    <ChildComponent />
  </div>
</template>
 
<script>
import { provide, ref } from 'vue';
import ChildComponent from './ChildComponent.vue';
 
export default {
  components: {
    ChildComponent,
  },
  setup() {
    const isShowModal = ref(false);
    const openModal = () => {
      isShowModal.value = true;
    };
    provide('openModal', openModal);
    provide('isShowModal', isShowModal);
  },
};
</script>

// 子组件
<template>
  <div>
    <Modal :visible="isShowModal" />
  </div>
</template>
 
<script>
import { inject, watch } from 'vue';
import Modal from './Modal.vue';
 
export default {
  components: {
    Modal,
  },
  setup() {
    const isShowModal = inject('isShowModal');
    const openModal = inject('openModal');
    watch(isShowModal, (newVal) => {
      if (newVal) {
        Modal.open({
          title: '提示',
          content: '这是一个弹框',
          onOk: () => {
            isShowModal.value = false;
          },
        });
      } else {
        Modal.close();
      }
    });
  },
};
</script>

// Modal.vue
<template>
  <div v-show="visible" class="modal">
    <div class="modal-mask"></div>
    <div class="modal-wrapper">
      <div class="modal-content">
        <div class="modal-header">
          <slot name="header"></slot>
          <span class="modal-close" @click="handleClose">×</span>
        </div>
        <div class="modal-body">
          <slot name="content"></slot>
        </div>
        <div class="modal-footer">
          <slot name="footer"></slot>
        </div>
      </div>
    </div>
  </div>
</template>
 
<script>
import { ref } from 'vue';
 
const MODAL_CONTAINER_CLASSNAME = 'modal-container';
 
export default {
  props: {
    visible: {
      type: Boolean,
      default: false,
    },
  },
  setup(props) {
    const modalContainer = ref(null);
 
    const handleClose = () => {
      props.onClose && props.onClose();
    };
 
    const transitionEndHandler = () => {
      if (!props.visible) {
        modalContainer.value.classList.remove(MODAL_CONTAINER_CLASSNAME);
      }
    };
 
    const open = ({ title, content, onOk, onCancel }) => {
      props.onOpen && props.onOpen();
      modalContainer.value.classList.add(MODAL_CONTAINER_CLASSNAME);
    };
 
    const close = () => {
      props.onClose && props.onClose();
    };
 
    return {
      handleClose,
      open,
      close,
    };
  },
};
</script>