stranka1.html
<html>
<head>
<title>Testovaci stranka</title>
</head>
<body>
<div className="App">
<header className="App-header">
logo, navigation, ...
</header>
<div>
<div>
Search: <input value="abc"/>
<button>Go</button>
</div>
<div>
Results for abc:
<div>
<h2>Result 1</h2>
Long description </div>
</div>
</div>
<footer>
MIT License
</footer>
</div>
</body>
</html>
document.getElementsByTagName('input')[0].value = 'cde'
or
$('input').val('cde')
Can we do better?