onclick_hide_js.html

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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <h1>Javascript example</h1>
    <h3>Onclick hide</h3>
    <p id="demo" style="display: block;">you can always do this!</p>
    <button type="button" onclick="document.getElementById('demo').style.display='none'">Hide</button>
</body>
</html>