JSFiddle - React, Tailwind, and code Playground

HTML

<div id="app">
	{{value}}
	<input type="text" v-model="value.first">
	<input type="text" v-model="lastName">
</div>

JavaScript

new Vue({
	el:'#app',
	data:{
		value:{
			first: 'john',
			second: 'doe'
		}
	},
	computed: {
    	lastName: {
        	get(){
	            return this.value.second;
        	},
        	set(newValue){
        	    this.value.second = newValue;
        	}

    	} 
  	}     
});