chapter8.html

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<title>Chapter 8: HTML Advanced</title>
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.chapter-header { font-size: 1.8rem; margin-bottom: 25px; }
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.item { margin-bottom: 25px; padding: 10px; border: 1px solid #ccc; border-radius: 6px; background:#fafafa; }
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.item-row .item { flex: 1 1 calc(33% - 20px); min-width: 250px; }
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textarea { width: 100%; }
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<h2 class="chapter-header" id="heading">Chapter 8: HTML Advanced</h2>

<!-- Data URIs -->
<div class="tag-section">
<h3> Data URIs</h3>
<div class="item">
<textarea name="input" cols="30" rows="3">Change this text and click the download link</textarea>
<br>
<a href="javascript:void(0)" download="data.txt">Download Text</a>
<script>
var input = document.querySelector("textarea[name='input']");
var download = document.querySelector("a[download]");
input.addEventListener("input", updateDownloadHref, false);
updateDownloadHref();
function updateDownloadHref() {
  var text = input.value;
  download.setAttribute("href", "data:text/plain;charset=utf-8," + encodeURIComponent(text));
}
</script>
<div class="caption">Data URI Example (Download Text)</div>
</div>
</div>

<!-- Block & Inline Elements -->
<div class="tag-section">
<h3> Block Elements</h3>
<div class="item-row">
<div class="item">
<p>This is a &lt;p&gt; block element</p>
<div class="caption">Block elements occupy full width</div>
</div>
<div class="item">
<div>This is a &lt;div&gt; block element</div>
<div class="caption">Block element example</div>
</div>
</div>

<h3> Inline Elements</h3>
<div class="item-row">
<div class="item">
<span>This is an inline &lt;span&gt;</span>
<div class="caption">Inline elements occupy only needed width</div>
</div>
<div class="item">
<b>This is bold inline text</b>
<div class="caption">Inline element example</div>
</div>
</div>

<h3> Inline-block Elements</h3>
<div class="item-row">
<div class="item">
<button>Button</button>
<div class="caption">&lt;button&gt; behaves inline-block</div>
</div>
<div class="item">
<input type="text" placeholder="Input field">
<div class="caption">&lt;input&gt; behaves inline-block</div>
</div>
<div class="item">
<textarea placeholder="Textarea"></textarea>
<div class="caption">&lt;textarea&gt; inline-block example</div>
</div>
</div>
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