HTML 中的 span 标签标准用途是什么？ - 知乎 大意就是，SPAN元素它自己本身啥也不是， 但是，它在结合诸如：class,lang,或者dir属性时，非常有用。 它起到描述了（文档内容）的作用。 （样式：class+css；内容语言：lang；dir：文字方向） 另外：回答下这个问题的标题下面的问题= = HTML 4 01关于包含元素的定义：
html - What is lt;span gt; lt; span gt; element? - Stack Overflow The span tag just tells the browser to apply what ever style changes are included within the span and if there is no styling within the span then there would be no formatting applied to the enclosed text This is a bit different from the div tag which incorporates a paragraph break even if no styling options are included within a div So it is useful when you want to apply styles to elements
What is a span and when should I use one? - Stack Overflow What is a "span"? A span<T> is: A very lightweight abstraction of a contiguous sequence of values of type T somewhere in memory Basically a struct { T * ptr; std::size_t size; } with a bunch of convenience methods A non-owning type (i e a "reference-type" rather than a "value type"): It never allocates nor deallocates anything and does not keep smart pointers alive It was formerly known as