这很简单。

span的使用不会影响布局，因为它是内联的(在行中(不应该混淆，因为东西可以被换行)) 使用div会影响布局，里面的内容会出现在新行(block element)中，当你想添加的元素没有特殊的语义，而你想让它出现在新行中时，使用<div>。

为了完整起见，我建议你这样思考:

There are lots of block elements (linebreaks before and after) defined in HTML, and lots of inline tags (no linebreaks). But in modern HTML all elements are supposed to have meanings: a <p> is a paragraph, an <li> is a list item, etc., and we're supposed to use the right tag for the right purpose -- not like in the old days when we indented using <blockquote> whether the content was a quote or not. So, what do you do when there is no meaning to the thing you're trying to do? There's no meaning to a 400px-wide column, is there? You just want your column of text to be 400px wide because that suits your design. For this reason, they added two more elements to HTML: the generic, or meaningless elements <div> and <span>, because otherwise, people would go back to abusing the elements which do have meanings.

只是想添加一些历史背景关于span和div是如何产生的

跨度历史:

On July 3, 1995, Benjamin C. W. Sittler proposes a generic text container tag for applying styles to certain blocks of text. The rendering is neutral except if used in conjunction of a stylesheet. There is a debate around versus about readability, meaning. Bert Bos is mentioning the extensibility nature of the element through the class attribute (with values such as city, person, date, etc.). Paul Prescod is worried that both elements will be abused. He is opposed to text mentionning that "any new element should be on an old one" and adding "If we create a tag with no semantics it can be used anywehere without ever being wrong. We must force authors to properly tag the semantics of their document. We must force editor vendors to make that choice explicit in their interfaces."

-来源(w3 wiki)

在RFC草案中引入了span:

首先，一个普通的骗局 需要tainer来携带LANG和BIDI属性 在没有其他要素的情况下;《SPAN ele》 Ment就是为此目的而引入的。

-来源(IETF草案)

div的历史:

DIV元素可用于将HTML文档构造为划分的层次结构。 .．. 的支持之前，Netscape就引入了CENTER HTML 3.0 DIV元素。它被保留在HTML 3.2中，因为它具有 广泛的部署。

HTML 3.2规格

In a nutshell, both elements arose out of a need for a more semantically-generic container. Span was proposed as a more generic replacement for a <text> element to style text. Div was proposed as a generic way to divide pages and had the added benefit of replacing the <center> tag for center-aligning content. Div has always been a block element because of its history as a page divider. Span has always been an inline element because its original purpose was text styling and today div and span have both arrived at being generic elements with default block and inline display properties respectively.

记住，基本上，它们的自我也不执行任何函数。 它们不仅仅通过标记来确定功能。

它们只能在CSS的帮助下进行定制。

现在回到你的问题:

SPAN标签加上一些样式将是有用的，在一行中，比如在一个段落中，在html中。 这是HTML中的行级或语句级。

例子:

<p>Am writing<span class="time">this answer</span> in my free time of my day.</p>

DIV标签的功能就像上面说的那样，只能在样式的支持下可见，可以容纳大量的HTML代码。

DIV是块级

例子:

    <div class="large-time">
    <p>Am writing <span class="time"> this answer</span> in my free time of my day. 
    </p>
    </div>

根据您的需求，这两种方法都有使用的时间和情况。

希望我的答案很清楚。 谢谢你！

我想说，如果你懂一点西班牙语，看看这一页，在那里有适当的解释。

然而，一个快速的定义是，div是用于划分部分，span是用于将某种样式应用到另一个块元素中的元素，如div。

“块元素”的意义是隐含的，但从未明确说明。如果我们忽略所有的理论(理论是好的)，那么下面是一个语用比较。以下几点:

<p>This paragraph <span>has</span> a span.</p>
<p>This paragraph <div>has</div> a div.</p>

生产:

This paragraph has a span.

This paragraph

has
a div.

这表明div不仅不应该内联使用，而且它根本不会产生想要的效果。