HTML 注释不会在浏览器中显示。

语法如下：

<!-- Write your comments here -->

注释一行代码

<p>This is a paragraph.</p>

<!-- <p>This is another paragraph </p> -->

<p>This is a paragraph too.</p>

注释多行代码

<p>This is a paragraph.</p>
<!--
<p>Look at this cool image:</p>
<img border="0" src="pic_trulli.jpg" alt="Trulli">
-->
<p>This is a paragraph too.</p>

注释一句话的某个单词

<p>This <!-- great text --> is a paragraph.</p>