HTML 边距宽度属性</strong><b>用于指定 Iframe</b>元素中内容的左右边距。</p> <p><strong>句法：</strong> </p> <div class="hcb_wrap"> <pre class="prism line-numbers lang-html" data-lang="HTML"><code class="replace"><iframe marginwidth="pixels"></code></pre> </div> <p><strong>属性值：</strong></p> <ul> <li><strong>像素：</strong>它包含值，即<b>像素</b>，它指定了 Iframe 元素中内容的左右边距。</li> </ul> <p><strong>注意：</strong> HTML 5 不支持此属性，您可以使用 CSS 作为替代。<br/>下面的例子说明了<strong><iframe> marginwidth 属性：</strong><br/><strong>例子：</strong> </p> <div class="hcb_wrap"> <pre class="prism line-numbers lang-html" data-lang="HTML"><code class="replace"><!DOCTYPE html> <html> <head> <title> HTML <iframe> marginwidth Attribute </title> </head> <body> <center> <h1 style="color:green;"> GeeksforGeeks </h1> <h2> HTML Iframe marginwidth Attribute </h2> <p>Content goes here</p> <iframe src= "https://ide.geeksforgeeks.org/tryit.php" height="200" width="400" marginwidth="50">