A special method of triangle (an amazing skill ~)

A special practice of triangle:

CSS:

Em{
Display:Block;
Font:0/0 "";
Border:6pxSolid;
Border-Color:# Fff #000;
}

Hmtl:

<Em> </em>

CodeSimple. You can also use the border color to easily create triangles in all directions!

This tip turns to ghost Fei's blog: http://www.planabc.net/2006/12/17/css_triangle/

The principle is definitely not needed to be explained!

The small triangles on most pages are mainly implemented by images.

For adding an empty tag or adding an image, the pros and cons of this label have their own opinions.

However, in terms of semantics, I think it is more inclined to process Background images.

Here is just an interesting technique to introduce.