JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <input id="main" type="text" />
    <input id="autocomplete" type="text" disabled="disabled" />
</div>

CSS

div
{
    position: relative;
}
#main{
    position: absolute;
    top: 0;
    left: 0;
    z-index: 11;
    background: transparent;
    
}
#autocomplete{
    position: absolute;    
    top: 0;
    left: 0; 
    background: transparent;
    z-index: 10;
}

JavaScript

$('#main').keyup(function(e){
    console.log(e);
    $('#autocomplete').val($(this).val() + 'asdf')
});