<code>&lt;head&gt;</code> tag and inside <code>&lt;body&gt;</code> tag.</p>
<h3>Advantages</h3>
<ul>
    <li>Easy to implement.</li>
    <li>Can apply to some specific libraries.</li>
</ul>
<h3>Disadvantages</h3>
<ul>
    <li>Pollute the naming pool.</li>
    <li>Make first render slower.</li>
</ul>
<h3>Import in <code>&lt;head&gt;</code></h3>
<p>Import in <code>&lt;head&gt;</code> tag will block the render thread until every script in the <code>&lt;head&gt;</code> are fetched. It will make your website slo