Does ReflowPDF support the CSS property position-visibility?

pixel-exact: Our rendering of the example is identical to Chrome's, pixel for pixel — no further apart than the example's own noise floor. Measured against Chrome on 1 example; the renders and the difference maps are published at https://reflowpdf.com/conformance/css/position-visibility.

Dataset 20261001-0535-e08c90a · measured 2026-10-01 05:35 UTC

position-visibility

✓pixel-exactcss-anchor-position-1

Our rendering of the example is identical to Chrome's, pixel for pixel — no further apart than the example's own noise floor.

What the specification says

Initial value: anchor-visible
Applies to: absolutely positioned boxes
Inherited: no
Percentages: n/a
Computed value: as specified
Syntax: always | [ anchor-valid || anchor-visible || no-overflow ]

css-anchor-position-1 definition

The measurements

One example. Each is one declaration on a small page, drawn by Chrome and by our engine. Drag the handle to wipe between them.

position-visibility:no-overflow✓pixel-exact

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.

Identical to Chrome: nothing differs, so there is no difference map to show.

Differing pixels: 0
Max channel delta: 0

the example page

Which values were measured

“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 4 branches; 1 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
always	not measured
anchor-valid	not measured
no-overflow	✓pixel-exact
anchor-visible	not measured

Measured against Chrome 148.0.7778.96 on 2026-10-01, with up to 40 candidate values tried per property. All properties · How the measurement works

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