JSFiddle - React, Tailwind, and code Playground

by jessikwa

HTML

<textarea id="tb"></textarea>

JavaScript

var tb = document.getElementById("tb");
var checkTextareaSize = function () {
  tb.style.height = "1px";
  tb.style.height = (25 + tb.scrollHeight) + "px";
}
tb.addEventListener("keyup", checkTextareaSize);
checkTextareaSize();