文本区域的大小可以通过cols和rows属性指定，甚至更好;通过CSS的高度和宽度属性。 所有主流浏览器都支持cols属性。 一个主要的区别是<TEXTAREA…>是一个容器标记:它有一个开始标记()。

CSS

input
{
    width: 300px;
    height: 40px;
} 

HTML

<textarea rows="4" cols="50">HELLO</textarea>

根据w3c, cols和rows都是textarea的必需属性。行和Cols是将适合文本区域的字符数，而不是像素或其他潜在的任意值。顺着row /cols走。

我建议两者都用。如果客户端不支持CSS，行和cols是必需的，也是有用的。但作为一名设计师，我会重写它们以获得我想要的尺寸。

推荐的方法是通过外部样式表。

textarea { 宽度:300 px; 身高:150 px; ｝ textarea > < textarea > < /

The answer is "yes". That is, you should use both. Without rows and cols (and there are default values even if you don't use them explicitly) the textarea is unusably small if CSS is disabled or overriden by a user stylesheet. Always keep accessibility concerns in mind. That being said, if your stylesheet is allowed to control the appearance of the textarea, you will generally wind up with something that looks a whole lot better, fits into the overall page design well, and that can resize to keep up with user input (within the limits of good taste, of course).

 <textarea style="width:300px; height:150px;" ></textarea>