frame:
border: Border Color Border size of the bounding shape;
Decomposed into
border - width: (number) PX; border size (changing the size of the border)
border - style:; (shape change frame) frame shape
solid; solid boxes
dashed; dashed box
dotted; dot chain line block
double; double line
border - color: #ccc; border color (for changing the color of the bezel)
Abbreviated as: border: 5px solid # 000;
Case:
border - top ： 5px solid #000;
border - left ： 5px dashed #ooo;
border - right ： 5px double #000;
border - bottom ： 5px dotted #000;
HTML The triangle diagram:
css：widrh:0px;
heigth:0px;
border:30px solid transparent;
border-left-color:red;
body{background:#000;}
Displayed arrow pointing to the right of the triangles.
Achieve renderings
