JavaScript/bulb.html at main · Kennerdol/JavaScript · GitHub

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<!DOCTYPE html>

<html>
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <title>JavaScript</title>
        <meta name="description" content="">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <link rel="stylesheet" href="">
    </head>
    <body>
        <h2 id="HD">What Can JavaScript Do?</h2>

        <p>JavaScript can change HTML attribute values.</p>

        <p>In this case JavaScript changes the value of the src (source) attribute of an image.</p>

        <button onclick="document.getElementById('myImage').src='pic_bulbon.gif'">Turn on the light</button>

        <img id="myImage" src="pic_bulboff.gif" style="width:100px">

        <button onclick="document.getElementById('myImage').src='pic_bulboff.gif'">Turn off the light</button>
        <br><br>
        <button onclick="document.getElementById('HD').style.fontSize='35px'">Increase Font Size</button>

        <br><br>
        <button onclick="document.getElementById('HD').style.fontSize=''">Resert Font Size</button>
        <button onclick="document.getElementById('HD').style.display='none'">Hide Style</button>
        <button onclick="document.getElementById('HD').style.display='block'">Show Style</button>


        <script src="" async defer></script>
    </body>
</html>