4dkankan-components/docs/examples/dialog/customization-header.vue

<template>
    <el-button @click="visible = true"> Open Dialog with customized header </el-button>
    <el-dialog v-model="visible" :show-close="false">
        <template #header="{ close, titleId, titleClass }">
            <div class="my-header">
                <h4 :id="titleId" :class="titleClass">This is a custom header!</h4>
                <el-button type="danger" @click="close">
                    <el-icon class="el-icon--left"><CircleCloseFilled /></el-icon>
                    Close
                </el-button>
            </div>
        </template>
        This is dialog content.
    </el-dialog>
</template>

<script lang="ts" setup>
import { ref } from 'vue'
import { ElButton, ElDialog } from 'element-plus'
import { CircleCloseFilled } from '@element-plus/icons-vue'

const visible = ref(false)
</script>

<style scoped>
.my-header {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}
</style>