Underline a character in a text in Vue SplitButton component

<template>
    <ejs-splitbutton :items='items' :beforeItemRender='itemRender'>Paste</ejs-splitbutton>
</template>

<script>
import Vue from 'vue';
import { SplitButtonPlugin } from "@syncfusion/ej2-vue-splitbuttons";
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);
Vue.use(SplitButtonPlugin);

export default {
    data () {
        return {
            items:[
            {
                text: 'Cut'
            },
            {
                text: 'Copy'
            },
            {
                text: 'Paste'
            }]
        };
    },
    methods: {
        itemRender: function(args) {
            if (args.item.text === 'Copy') {
                //To underline a particular text.
                args.element.innerHTML = '<u>C</u>opy';
            }
        }
    }
}
</script>

<style>
@import '../node_modules/@syncfusion/ej2-base/styles/material.css';
@import '../node_modules/@syncfusion/ej2-buttons/styles/material.css';
@import '../node_modules/@syncfusion/ej2-popups/styles/material.css';
@import '../node_modules/@syncfusion/ej2-splitbuttons/styles/material.css';
  .e-split-btn-wrapper{
   margin: 20px 20px 5px 5px;
  }
</style>