Does ReflowPDF support the CSS property baseline-shift?

Q: Does ReflowPDF support the CSS property baseline-shift?

0 of 8 examples match Chrome. parsed, no effect: The parser accepts the name, yet our rendering is byte-identical with and without the declaration while Chrome's is not. The declaration is being swallowed. Measured against Chrome on 8 examples; the renders and the difference maps are published at https://reflowpdf.com/conformance/css/baseline-shift.

Dataset 20261011-0550-f160c57 · measured 2026-10-11 05:50 UTC

baseline-shift

✕parsed, no effect0 of 8 examples match Chromecss-inline-3

The parser accepts the name, yet our rendering is byte-identical with and without the declaration while Chrome's is not. The declaration is being swallowed.

What the specification says

Initial value: 0
Applies to: inline-level boxes and SVG text content elements
Inherited: no
Percentages: refer to the used value of line-height
Computed value: the specified keyword or a computed <length-percentage> value
Syntax: <length-percentage> | sub | super | top | center | bottom

css-inline-3 definition

The measurements

8 examples, 0 of them matching Chrome, the rest first. Each is one declaration on a small page, drawn by Chrome and by our engine. Drag the handle to wipe between them.

baseline-shift:20px✕parsed, no effect

Chrome of this test — Left of the line is our rendering; right of it is the chrome. Drag, or focus the slider and use the arrow keys.

Our render of this test — Left of the line is our rendering; right of it is the chrome. Drag, or focus the slider and use the arrow keys.

3,005 pixels differ from Chrome, the largest by 204 of 255 on one channel.

Differing pixels: 3,005
Max channel delta: 204

the example page

baseline-shift:sub✕parsed, no effect

3,060 pixels differ from Chrome, the largest by 204 of 255 on one channel.

Differing pixels: 3,060
Max channel delta: 204

the example page

baseline-shift:super✕parsed, no effect

2,868 pixels differ from Chrome, the largest by 204 of 255 on one channel.

Differing pixels: 2,868
Max channel delta: 204

the example page

baseline-shift:50%✕parsed, no effect

2,795 pixels differ from Chrome, the largest by 204 of 255 on one channel.

Differing pixels: 2,795
Max channel delta: 204

the example page

baseline-shift:40%✕parsed, no effect

2,572 pixels differ from Chrome, the largest by 204 of 255 on one channel.

Differing pixels: 2,572
Max channel delta: 204

the example page

baseline-shift:4px✕parsed, no effect

1,835 pixels differ from Chrome, the largest by 204 of 255 on one channel.

Differing pixels: 1,835
Max channel delta: 204

the example page

baseline-shift:calc(40% + 20px)✕parsed, no effect

3,701 pixels differ from Chrome, the largest by 204 of 255 on one channel.

Differing pixels: 3,701
Max channel delta: 204

the example page

baseline-shift:calc(20px + 4px)✕parsed, no effect

3,270 pixels differ from Chrome, the largest by 204 of 255 on one channel.

Differing pixels: 3,270
Max channel delta: 204

the example page

Which values were measured

“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 7 branches; 4 of them carry a measurement. The publishing ceiling is 12 examples per property — a branch past it is left out by our choice, not by accident.

Value	Measured
20px	✕parsed, no effect
50%	✕parsed, no effect
sub	✕parsed, no effect
super	✕parsed, no effect
top	not measured
center	not measured
bottom	not measured

Measured against Chrome 148.0.7778.96 on 2026-10-11, with up to 40 candidate values tried per property. All properties · How the measurement works

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Value

Measured

20px

✕parsed, no effect

50%

✕parsed, no effect

sub

✕parsed, no effect

super

✕parsed, no effect

top

not measured

center

not measured

bottom

not measured