JSFiddle - React, Tailwind, and code Playground

HTML

<textarea oninput="auto_grow(this)"></textarea>

CSS

textarea {
    resize: none;
    overflow: hidden;
    min-height: 50px;
    max-height: 100px;
}

JavaScript

function auto_grow(element) {
    element.style.height = "5px";
    element.style.height = (element.scrollHeight)+"px";
    console.log(element.scrollHeight+", "+element.scrollWidth)
}