JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.13/jquery-ui.min.js"></script>
<input id="grey" type="text" value="test auto complete" />
<input id="black" type="text" value="test" />

CSS

#grey
{
    color: #CCC;
    background-color: transparent;
    top: 0px;
    left: 0px;
    position:absolute;
}
#black
{
    color: #000;
    background-color: transparent;
    z-index: 999;
    top: 0px;
    left: 0px;
    position:absolute;
}