非标
此特征是非标准的，且不在标准轨道中。不要在面向 Web 的生产站点中使用它：它不适用于每个用户。实现之间可能存在大的不兼容性，且行为将来可能改变。
-ms-block-progression
CSS
特性为
Microsoft extension
that specifies the block progression and layout orientation.
| 初始值 |
tb
|
|---|---|
| 适用于 | 所有元素 |
| 继承 | no |
| 计算值 | 如指定 |
| 动画类型 | discrete |
tb
Default. Top-to-bottom block flow. Layout is horizontal.
rl
Right-to-left block flow. Layout is vertical.
bt
Bottom-to-top block flow. Layout is horizontal.
lr
Left-to-right block flow. Layout is vertical.
tb | rl | bt | lr
Not part of any specification.
In vertical layout, text lines are rotated 90° clockwise. Images are not rotated, but tables are. Box layout in vertical orientations is exactly analogous to layout in the horizontal orientation: width, height, top, bottom, right, and left do not rotate with the text.
Only one block progression is active at a time; these values cannot be combined.
This property is based on the
block-progression
property of the CSS3 Text Layout module.