CSS style-Rotate rotate

The general front end often used for example ' < ' such arrows, and then by the rotation of the direction, you can let the arrows up, down, and then one day I was using the span, the background is the UI provided by the arrow image, the dead and alive can not rotate, I will circle ...

Solve:

Change the span element directly into a block element, or set Inline-block or block for span. Allow span to be a block element.

Is the Chinese w3.org network above explanation, at first do not understand atomic inline-level element is a what, point link see is the introduction of the inline level box, always think that the atomic cascade element is inline inline element, But it is strange that the inline element is not effective. Later a variety of paste to know that the atom inline element refers to the Inline-block element ...

So the summary is: Transform for block-level elements and atomic inline elements that are inline-block

CSS style-Rotate rotate