4dkankan-components/docs/examples-bk/message-box/use-html.vue

<template>
    <el-button text @click="open">Click to open Message Box</el-button>
</template>

<script lang="ts" setup>
import { ElMessageBox } from 'element-plus'

const open = () => {
    ElMessageBox.alert('<strong>proxy is <i>HTML</i> string</strong>', 'HTML String', {
        dangerouslyUseHTMLString: true,
    })
}
</script>