HTML cols 属性</strong>用于<em>告诉浏览器在一行中应该容纳多少平均宽度的字符，即要显示的列数</em>。<br/>它用于指定<strong><Textarea></strong>元素的可见宽度。</p> <p><strong>句法：</strong> </p> <div class="hcb_wrap"> <pre class="prism line-numbers lang-html" data-lang="HTML"><code class="replace"><textarea cols="number"> </code></pre> </div> <p><strong>属性值：</strong>它包含指定文本区域宽度的值，即<b>数字</b>。它的默认值为 20。</p> <p><strong>例子：</strong> </p> <div class="hcb_wrap"> <pre class="prism line-numbers lang-html" data-lang="HTML"><code class="replace"><!-- HTML program to illustrate cols attribute --> <!DOCTYPE html> <html> <head> <title> HTML Textarea cols Attribute </title> <style> h1, h2 { text-align: center; } </style> </head> <body style="text-align:center;"> <h1 style="color: green;"> GeeksforGeeks </h1> <h2> HTML <textarea>cols Attribute </h2> <!-- Below textarea is assigned a cols value 25 That is, 25 characters will fit in a line --> <textarea rows="4" cols="25"> A computer science portal for geeks.