JSFiddle - React, Tailwind, and code Playground

HTML

<div title="hello
tooltip
e" class="item">
    <p>This is my item</p>
    <div class="tooltip">Tooltip</div>
</div>

CSS

.item {
        position: relative;
        width: 1000px;
        height: 40px;
        top: 200px;
        left: 400px;
        background: #CCC;
    }

    .item .tooltip {
        position: fixed; /** depends on how it handles the e.pageX and e.pageY **/
        width: 80px;
        height: 30px;
        background: #06F;
        z-index: 10;
        display: none; /**let the tooltip be not visable, when startup **/
    }