JSFiddle - React, Tailwind, and code Playground
by jfreiheit
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>HTML ändern</title>
</head>
<body>
<input id="input" placeholder="neues Item" onchange="addItem(this)"/>
<ul id="ul1">
<li>erstes</li>
<li>zweites</li>
</ul>
</body>
</html>
JavaScript
function addItem(inputEl)
{
let text = inputEl.value;
inputEl.value = "";
let textNode = document.createTextNode(text);
let liNode = document.createElement('li');
liNode.appendChild(textNode);
let ulNode = document.getElementById('ul1');
ulNode.appendChild(liNode);
}