Prerequisites: A Mongolian font, with glyphs for vertical text.

mongolian

same Test passes if the order of characters and paragraphs and the angle of characters is the same.

ᠬᠤᠯᠤᠭᠠᠨᠠ ᠡᠨᠳᠡ ᠡᠨᠡ ᠭ᠋ᠠᠯ ᠴᠢᠷᠢᠭ ᠬᠠᠨ᠎ᠠ

ᠤᠷᠲᠤ ᠡᠨᠳᠡ ᠡᠨᠡ ᠭ᠋ᠠᠯ ᠴᠢᠷᠢᠭ

reference graphic

Assertion: [Exploratory test] Setting writing-mode to tb-lr will cause Mongolian text to run vertically down the left size of a box, with upright characters, and wrap to the right, and cause paragraphs to flow to the right.

Notes:

The tb-lr value of writing-mode is deprecated in favour of vertical-lr.

HTML5

vertical-text-103
Result summary & related tests