4dkankan-components/docs/examples-bk/dialog/focus-trapping.vue

<template>
    <el-button text @click="dialogVisible = true">click to open the Dialog</el-button>

    <div>
        <p>Close dialog and the input will be focused</p>
        <el-input ref="inputRef" placeholder="Please input" />
    </div>

    <el-dialog v-model="dialogVisible" destroy-on-close title="Tips" width="30%" @close-auto-focus="handleCloseAutoFocus">
        <span>This is a message</span>
        <el-divider />
        <el-input placeholder="Initially focused" />
        <template #footer>
            <span class="dialog-footer">
                <el-button @click="dialogVisible = false">Cancel</el-button>
                <el-button type="primary" @click="dialogVisible = false">Confirm</el-button>
            </span>
        </template>
    </el-dialog>
</template>

<script lang="ts" setup>
import { ref } from 'vue'
import type { ElInput } from 'element-plus'

const dialogVisible = ref(false)
const inputRef = ref<InstanceType<typeof ElInput>>()

const handleCloseAutoFocus = () => {
    inputRef.value?.focus()
}
</script>
<style scoped>
.dialog-footer button:first-child {
    margin-right: 10px;
}
</style>