revision:
- specifies whether lines of text are laid out horizontally or vertically.
Property values:
horizontal-tb : let the content flow horizontally from left to right, vertically from top to bottom
vertical-lr : let the content flow vertically from top to bottom, horizontally from right to left
vertical-rl : let the content flow vertically from top to bottom, horizontally from left to right
example: writing-mode property
Some text with default writing-mode.
Some text with a span element with a vertical-rl writing-mode.
Some text with writing-mode: vertical-rl.
<div>
<p class="test1">Some text with default writing-mode.</p>
<p>Some text with a span element with a <span class="test2">vertical-rl</span> writing-mode.</p>
<p class="test2">Some text with writing-mode: vertical-rl.</p>
</div>
<style>
p.test1 {writing-mode: horizontal-tb;}
p.test2 {writing-mode: vertical-rl;}
span.test2 {writing-mode: vertical-rl; }
</style>