HTMLコンピューターコード要素の使用方法

使用HTML显示代码时，应使用<code>和<pre class="brush:php;toolbar:false">元素。1. 使用&lt;code&gt;表示内联代码，如&lt;code&gt;console.log()&lt;/code&gt;，它以等宽字体显示且不保留空白符。2. 使用&lt;pre class=&quot;brush:php;toolbar:false&quot;&gt;&lt;code&gt;包裹多行代码，如函数定义，以保留缩进和换行。3. 最佳实践包括：转义特殊字符（如&amp;lt;代替&lt;），结合Prism.js等库实现语法高亮，并添加lang-类标识语言，同时注意可访问性，确保屏幕阅读器正确解析，最终提升代码的可读性与安全性。&lt;/p&gt; &lt;p&gt;&lt;img src=&quot;/static/imghw/default1.png&quot; data-src=&quot;https://img.php.cn/upload/article/000/000/000/175437170353513.jpeg&quot; class=&quot;lazy&quot; alt=&quot;How to use HTML computer code elements&quot;&gt;&lt;/p&gt; &lt;p&gt;When you want to display computer code in a web page—like a snippet of HTML, CSS, JavaScript, or terminal commands—you should use HTML's built-in elements designed for code. These elements help distinguish code from regular text and improve readability and accessibility.&lt;/p&gt; &lt;img src=&quot;/static/imghw/default1.png&quot; data-src=&quot;https://img.php.cn/upload/article/000/000/000/175437170538631.jpeg&quot; class=&quot;lazy&quot; alt=&quot;How to use HTML computer code elements&quot;&gt;&lt;p&gt;The main elements used for this are &lt;code&gt;&lt;code&gt;&lt;/code&gt; and &lt;code&gt;&lt;pre class=&quot;brush:php;toolbar:false&quot;&gt;&lt;/code&gt;. Here's how and when to use them.&lt;/p&gt; &lt;h3 id=&quot;Use-code-lt-code-gt-code-for-Inline-Code&quot;&gt;1. Use &lt;code&gt;&lt;code&gt;&lt;/code&gt; for Inline Code&lt;/h3&gt; &lt;p&gt;The &lt;code&gt;&lt;code&gt;&lt;/code&gt; element is meant for short, inline pieces of code. It tells browsers and screen readers that the content is a snippet of computer code.&lt;/p&gt; &lt;img src=&quot;/static/imghw/default1.png&quot; data-src=&quot;https://img.php.cn/upload/article/000/000/000/175437170732061.jpeg&quot; class=&quot;lazy&quot; alt=&quot;How to use HTML computer code elements&quot;&gt;&lt;p&gt;&lt;strong&gt;Example:&lt;/strong&gt;&lt;/p&gt;&lt;pre class='brush:php;toolbar:false;'&gt;&lt;p&gt;Use the &lt;code&gt;console.log()&lt;/code&gt; function to print output in JavaScript.&lt;/p&gt;</pre><p>This will display:<br /> Use the <code>console.log() function to print output in JavaScript.

By default, <code><code> uses a monospace font, which is standard for code, and it preserves neither whitespace nor line breaks—perfect for inline use.

2. Use <code><pre class="brush:php;toolbar:false"></code> for Block-Level Code</h3><p>When you want to show multiple lines of code or preserve formatting (like indentation and line breaks), wrap your <code><code></code> element inside a <code><pre class="brush:php;toolbar:false"></code> element.</p><p>The <code><pre class="brush:php;toolbar:false"></code> (short for "preformatted text") element keeps all whitespace and line breaks exactly as written in the HTML.</p><p><strong>Example:</strong></p><pre class='brush:php;toolbar:false;'><pre class="brush:php;toolbar:false"><code>function greet(name) { console.log("Hello, " + name); } greet("Alice");</code>

This will display the code in a fixed-width font with proper indentation and line breaks preserved.

Why use both <code><pre class="brush:php;toolbar:false"></code> and <code><code></code> together?</strong> </p><ul><li><code><pre class="brush:php;toolbar:false"></code> handles the formatting (whitespace, line breaks). </li><li><code><code></code> semantically marks the content as code.<br /> Using both gives both visual and semantic correctness.</li></ul><h3 id="Best-Practices-and-Tips">3. Best Practices and Tips</h3><ul><li><p><strong>Escape special HTML characters</strong> in your code snippets to prevent them from being interpreted as HTML. For example:</p><ul><li>Use <code>&lt;</code> instead of <code><</code></li><li>Use <code>&gt;</code> instead of <code>></code></li><li>Use <code>&amp;</code> instead of <code>&</code></li></ul><p>Example:</p><pre class='brush:php;toolbar:false;'><pre class="brush:php;toolbar:false"><code>if (x &lt; 5) { console.log("x is less than 5"); }</code>

Consider syntax highlighting: While HTML alone doesn't provide syntax coloring, you can use JavaScript libraries like Prism.js or Highlight.js to add color and styling to your code blocks.

Use the <code>lang- class (even though not standard) to help syntax highlighters identify the language:

<pre class="brush:php;toolbar:false"><code class="lang-javascript">function hello() { ... }</code>

Accessibility note: Screen readers will treat <code><code> appropriately, but avoid overusing it for non-code content.

Summary

• Use <code><code> for short, inline code snippets.
• Use <code><pre class="brush:php;toolbar:false">&lt;code&gt;...&lt;/code&gt;</pre> for multi-line or formatted code blocks.
• Escape HTML characters to display code safely.
• Combine with CSS or JavaScript libraries for better presentation.

Basically, keep it simple: <code><code> for code, <code><pre class="brush:php;toolbar:false"> when you need formatting, and always think about readability and safety.

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