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Status

This page documents the implementation status of various HTML and CSS features in Blitz.

CSS PropertiesHTML ElementsEventsWPT TestsWPT History

This page documents Blitz's scores on the "css" subsuite of the Web Platform Tests.

wpt / css / filter-effects

Score history
1 month3 months6 months1 year2 years4 yearsAll time
0%20%40%60%80%100%May 2025Jul 2025Sep 2025Nov 2025Jan 2026Mar 2026May 2026Jul 2026Sep 2026css/filter-effects

Data from commit:
89e5e61 Implement `text-align-last` (#998) (2026-10-01)

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total50.18%(186/393)47.33%(1762/3362)52.41%
animation61.58%(0/12)0.00%(1295/2076)62.38%
parsing52.42%(6/18)33.33%(253/339)74.63%
filter-function14.29%(2/14)14.29%(2/14)14.29%
crashtests100.00%(11/11)100.00%(11/11)100.00%
TestSubtestsSubtest %Status
azimuth-and-elevation.html(1/1)100.00%PASS
backdrop-filter-3d-transform-perspective.html(0/1)0.00%FAIL
backdrop-filter-backdrop-root-animation-in-effect.html(1/1)100.00%PASS
backdrop-filter-backdrop-root-backdrop-filter.html(0/1)0.00%FAIL
backdrop-filter-backdrop-root-clip-path-2.html(1/1)100.00%PASS
backdrop-filter-backdrop-root-clip-path.html(1/1)100.00%PASS
backdrop-filter-backdrop-root-filter.html(0/1)0.00%FAIL
backdrop-filter-backdrop-root-mask.html(1/1)100.00%PASS
backdrop-filter-backdrop-root-mix-blend-mode.html(1/1)100.00%PASS
backdrop-filter-backdrop-root-opacity.html(0/1)0.00%FAIL
backdrop-filter-basic-blur.html(1/1)100.00%PASS
backdrop-filter-basic-opacity-2.html(0/1)0.00%FAIL
backdrop-filter-basic-opacity.html(1/1)100.00%PASS
backdrop-filter-basic.html(0/1)0.00%FAIL
backdrop-filter-blur-large-value.html(0/1)0.00%FAIL
backdrop-filter-border-radius-change.html(1/1)100.00%PASS
backdrop-filter-boundary.html(1/1)100.00%PASS
backdrop-filter-box-shadow.html(0/1)0.00%FAIL
backdrop-filter-clip-radius-zoom.html(0/1)0.00%FAIL
backdrop-filter-clip-rect-2.html(0/1)0.00%FAIL
backdrop-filter-clip-rect-zoom.html(0/1)0.00%FAIL
backdrop-filter-clip-rect.html(0/1)0.00%FAIL
backdrop-filter-clip-rounded-clip.html(0/1)0.00%FAIL
backdrop-filter-clipped.html(0/1)0.00%FAIL
backdrop-filter-containing-block.html(0/1)0.00%FAIL
backdrop-filter-corner-shape-change.html(1/1)100.00%PASS
backdrop-filter-edge-behavior.html(1/1)100.00%PASS
backdrop-filter-edge-clipping-2.html(1/1)100.00%PASS
backdrop-filter-edge-clipping.html(1/1)100.00%PASS
backdrop-filter-edge-mirror.html(1/1)100.00%PASS
backdrop-filter-edge-pixels-2.html(1/1)100.00%PASS
backdrop-filter-edge-pixels.html(1/1)100.00%PASS
backdrop-filter-feimage-crash.html(1/1)100.00%PASS
backdrop-filter-fixed-clip.html(0/1)0.00%FAIL
backdrop-filter-image-size-filter-size-mismatch.html(1/1)100.00%PASS
backdrop-filter-important.html(1/1)100.00%PASS
backdrop-filter-in-transform-clip-surface.html(0/1)0.00%FAIL
backdrop-filter-inline-positioning.html(0/1)0.00%FAIL
backdrop-filter-invalid.html(0/1)0.00%FAIL
backdrop-filter-isolation-fixed.html(0/1)0.00%FAIL
backdrop-filter-isolation-isolate.html(0/1)0.00%FAIL
backdrop-filter-nested-3d-transform-perspective.html(0/1)0.00%FAIL
backdrop-filter-nested-border-radius-clip-2.html(0/1)0.00%FAIL
backdrop-filter-nested-border-radius-clip-3.html(0/1)0.00%FAIL
backdrop-filter-nested-border-radius-clip-4.html(0/1)0.00%FAIL
backdrop-filter-nested-border-radius-clip.html(0/1)0.00%FAIL
backdrop-filter-opacity-rounded-clip.html(1/1)100.00%PASS
backdrop-filter-paint-order.html(1/1)100.00%PASS
backdrop-filter-plus-filter-2.html(1/1)100.00%PASS
backdrop-filter-plus-filter.html(1/1)100.00%PASS
backdrop-filter-plus-mask-large.html(0/1)0.00%FAIL
backdrop-filter-plus-mask.html(0/1)0.00%FAIL
backdrop-filter-plus-opacity.html(1/1)100.00%PASS
backdrop-filter-plus-will-change-opacity.html(0/1)0.00%FAIL
backdrop-filter-reference-filter-mutated.html(0/1)0.00%FAIL
backdrop-filter-reference-filter.html(1/1)100.00%PASS
backdrop-filter-root-element.html(1/1)100.00%PASS
backdrop-filter-root-toggle-crash.html(1/1)100.00%PASS
backdrop-filter-scale-transform.html(0/1)0.00%FAIL
backdrop-filter-svg-background-image-blur.html(1/1)100.00%PASS
backdrop-filter-svg-blur.html(1/1)100.00%PASS
backdrop-filter-svg-foreignObject.html(0/1)0.00%FAIL
backdrop-filter-svg.html(1/1)100.00%PASS
backdrop-filter-transform-popover-crash.html(1/1)100.00%PASS
backdrop-filter-transform.html(0/1)0.00%FAIL
backdrop-filter-update.html(0/1)0.00%FAIL
backdrop-filter-with-background-clip-content-box.html(0/1)0.00%FAIL
backdrop-filter-with-background-clip-padding-box.html(0/1)0.00%FAIL
backdrop-filter-with-mix-blend-mode-same-element.html(0/1)0.00%FAIL
backdrop-filter-zero-size.html(1/1)100.00%PASS
backdrop-filters-blur-large.html(1/1)100.00%PASS
backdrop-filters-brightness.html(1/1)100.00%PASS
backdrop-filters-contrast.html(1/1)100.00%PASS
backdrop-filters-grayscale-001.html(1/1)100.00%PASS
backdrop-filters-grayscale-002.html(0/1)0.00%FAIL
backdrop-filters-grayscale-003.html(0/1)0.00%FAIL
backdrop-filters-hue-rotate.html(1/1)100.00%PASS
backdrop-filters-invert.html(1/1)100.00%PASS
backdrop-filters-opacity.html(1/1)100.00%PASS
backdrop-filters-saturate.html(1/1)100.00%PASS
backdrop-filters-sepia.html(1/1)100.00%PASS
background-image-blur-repaint.html(1/1)100.00%PASS
blur-clip-stacking-context-001.html(1/1)100.00%PASS
blur-clip-stacking-context-002.html(0/1)0.00%FAIL
blur-text.html(1/1)100.00%PASS
clip-under-filter-001.html(1/1)100.00%PASS
clip-under-filter-002.html(1/1)100.00%PASS
clip-under-filter-003.html(1/1)100.00%PASS
css-backdrop-filter-transform-clip.html(1/1)100.00%PASS
css-backdrop-filters-animation-blur.html(1/1)100.00%PASS
css-backdrop-filters-animation-brightness.html(1/1)100.00%PASS
css-backdrop-filters-animation-combined.html(1/1)100.00%PASS
css-backdrop-filters-animation-contrast.html(1/1)100.00%PASS
css-backdrop-filters-animation-drop-shadow.html(1/1)100.00%PASS
css-backdrop-filters-animation-grayscale.html(1/1)100.00%PASS
css-backdrop-filters-animation-hue-rotate.html(1/1)100.00%PASS
css-backdrop-filters-animation-invert.html(1/1)100.00%PASS
css-backdrop-filters-animation-opacity.html(1/1)100.00%PASS
css-backdrop-filters-animation-saturate.html(1/1)100.00%PASS
css-backdrop-filters-animation-sepia.html(1/1)100.00%PASS
css-filters-animation-blur.html(1/1)100.00%PASS
css-filters-animation-brightness.html(1/1)100.00%PASS
css-filters-animation-combined-001.html(1/1)100.00%PASS
css-filters-animation-contrast.html(1/1)100.00%PASS
css-filters-animation-drop-shadow.html(1/1)100.00%PASS
css-filters-animation-grayscale.html(1/1)100.00%PASS
css-filters-animation-hue-rotate.html(1/1)100.00%PASS
css-filters-animation-invert.html(1/1)100.00%PASS
css-filters-animation-opacity.html(1/1)100.00%PASS
css-filters-animation-saturate.html(1/1)100.00%PASS
css-filters-animation-sepia.html(1/1)100.00%PASS
css-filters-opacity-hit-testing.html(1/1)100.00%PASS
css-reference-large-svg-filter.html(1/1)100.00%PASS
drop-shadow-clipped-001.html(0/1)0.00%FAIL
drop-shadow-currentcolor-dynamic-001.html(0/1)0.00%FAIL
drop-shadow-currentcolor-dynamic-002.html(0/1)0.00%FAIL
drop-shadow-currentcolor-dynamic-003.html(0/1)0.00%FAIL
drop-shadow-currentcolor-inheritance.html(2/2)100.00%PASS
drop-shadow-with-3d-transform.html(0/1)0.00%FAIL
dynamic-filter-changes-001.html(1/1)100.00%PASS
effect-reference-add-hw-001.html(0/1)0.00%FAIL
effect-reference-after-001.html(1/1)100.00%PASS
effect-reference-delete.html(1/1)100.00%PASS
effect-reference-displacement-negative-scale-001.html(0/1)0.00%FAIL
effect-reference-feimage-001.html(0/1)0.00%FAIL
effect-reference-feimage-002.html(0/1)0.00%FAIL
effect-reference-feimage-003.html(0/1)0.00%FAIL
effect-reference-feimage-004.html(0/1)0.00%FAIL
effect-reference-lighting-no-light.tentative.html(0/1)0.00%FAIL
effect-reference-local-url-with-base-001.html(0/1)0.00%FAIL
effect-reference-merge-no-inputs.tentative.html(0/1)0.00%FAIL
effect-reference-obb-dimensions.html(0/1)0.00%FAIL
effect-reference-on-span.html(0/1)0.00%FAIL
effect-reference-on-transparent-element.html(0/1)0.00%FAIL
effect-reference-rename-001.html(1/1)100.00%PASS
effect-reference-rename-002.html(1/1)100.00%PASS
effect-reference-reset-style-delete-crash.html(1/1)100.00%PASS
effect-reference-source-alpha-001.html(0/1)0.00%FAIL
effect-reference-source-alpha-002.html(0/1)0.00%FAIL
empty-element-with-filter-002.html(0/1)0.00%FAIL
empty-element-with-filter-003.html(0/1)0.00%FAIL
empty-element-with-filter-004.html(0/1)0.00%FAIL
empty-element-with-filter.html(0/1)0.00%FAIL
feComposite-intersection-feTile-input-svg.html(0/1)0.00%FAIL
feComposite-intersection-feTile-input.html(0/1)0.00%FAIL
feDropShadow-negative-deviation.svg(1/1)100.00%PASS
feGaussianBlur-negative-deviation.svg(1/1)100.00%PASS
feGaussianBlur-stdDeviation-axis-zero.html(1/1)100.00%PASS
feImage-orientation.tentative.html(1/1)100.00%PASS
feImage-with-hidden-container-defs.html(0/1)0.00%FAIL
feImage-with-hidden-container-filter.html(0/1)0.00%FAIL
feImage-with-hidden-container-linearGradient.html(0/1)0.00%FAIL
feImage-with-hidden-container-mask.html(0/1)0.00%FAIL
feImage-with-hidden-container-pattern.html(0/1)0.00%FAIL
feImage-with-hidden-container-radialGradient.html(0/1)0.00%FAIL
feImage-with-text-viewport-dependence.html(0/1)0.00%FAIL
fecolormatrix-display-p3.html(0/1)0.00%FAIL
fecolormatrix-negative.html(0/1)0.00%FAIL
fecolormatrix-special-value.html(0/1)0.00%FAIL
fecolormatrix-type.html(0/1)0.00%FAIL
fecomponenttransfer-display-p3.html(0/1)0.00%FAIL
fecomposite-non-zero-inoffset-001.html(0/1)0.00%FAIL
feconvolve-divisor.html(1/1)100.00%PASS
feconvolve-region-001.html(0/1)0.00%FAIL
feconvolve-region-002.html(0/1)0.00%FAIL
feflood-with-filter-reference.html(0/1)0.00%FAIL
feimage-circular-reference-foreign-object-crash.html(1/1)100.00%PASS
feimage-element-ref-geometry.html(0/1)0.00%FAIL
feimage-reference-foreign-object-crash.html(1/1)100.00%PASS
feimage-reference-text-with-filter-crash.html(1/1)100.00%PASS
feimage-svg-image-with-nested-data-url-crash.html(1/1)100.00%PASS
feimage-target-child-reference-crash.html(1/1)100.00%PASS
felighting-no-light-source-style-update-crash.html(1/1)100.00%PASS
filter-cb-abspos-inline-001.html(1/1)100.00%PASS
filter-cb-abspos-inline-002.html(1/1)100.00%PASS
filter-cb-abspos-inline-003.html(1/1)100.00%PASS
filter-cb-dynamic-1a.html(1/1)100.00%PASS
filter-cb-dynamic-1b.html(0/1)0.00%FAIL
filter-chained-url-url-001.html(1/1)100.00%PASS
filter-clip-overflow-crash.html(1/1)100.00%PASS
filter-contrast-001.html(1/1)100.00%PASS
filter-contrast-002.html(0/1)0.00%FAIL
filter-contrast-003.html(0/1)0.00%FAIL
filter-effect-remove-unattached.html(0/1)0.00%FAIL
filter-external-001-test.html(0/1)0.00%FAIL
filter-external-002-test.html(0/1)0.00%FAIL
filter-grayscale-001.html(0/1)0.00%FAIL
filter-grayscale-002.html(1/1)100.00%PASS
filter-grayscale-003.html(1/1)100.00%PASS
filter-grayscale-004.html(0/1)0.00%FAIL
filter-grayscale-005.html(0/1)0.00%FAIL
filter-hue_rotate-001-test.html(1/1)100.00%PASS
filter-hue_rotate-002-test.html(0/1)0.00%FAIL
filter-invalid.html(0/1)0.00%FAIL
filter-invert-001-test.html(1/1)100.00%PASS
filter-invert-002-test.html(0/1)0.00%FAIL
filter-overflow-transformed-child-001.html(0/1)0.00%FAIL
filter-region-calc-001.html(0/1)0.00%FAIL
filter-region-html-content-viewport.tentative.html(0/1)0.00%FAIL
filter-region-negative-positioned-child-001.html(1/1)100.00%PASS
filter-region-transformed-child-001.html(1/1)100.00%PASS
filter-region-transformed-composited-child-001.html(1/1)100.00%PASS
filter-region-units-001.html(0/1)0.00%FAIL
filter-saturate-001-test.html(0/1)0.00%FAIL
filter-scale-001.html(1/1)100.00%PASS
filter-scaling-001.html(1/1)100.00%PASS
filter-sign-function.html(3/3)100.00%PASS
filter-subregion-01.html(0/1)0.00%FAIL
filter-svg-background-image-blur.html(1/1)100.00%PASS
filter-target-offscreen-below-viewport-001.html(1/1)100.00%PASS
filter-target-offscreen-below-viewport-002.html(1/1)100.00%PASS
filter-target-offscreen-below-viewport-003.html(1/1)100.00%PASS
filter-turbulence-invalid-001.html(0/1)0.00%FAIL
filter-url-to-non-existent-filter-001.html(1/1)100.00%PASS
filter-with-mix-blend-mode.html(1/1)100.00%PASS
filtered-block-is-container.html(1/1)100.00%PASS
filtered-html-is-not-container.html(0/1)0.00%FAIL
filtered-inline-applies-to-float.html(1/1)100.00%PASS
filtered-inline-is-container.html(0/1)0.00%FAIL
filters-drop-shadow-001.html(0/1)0.00%FAIL
filters-drop-shadow-002.html(0/1)0.00%FAIL
filters-drop-shadow-003.html(0/1)0.00%FAIL
filters-grayscale-001-test.html(0/1)0.00%FAIL
filters-opacity-001-test.html(1/1)100.00%PASS
filters-opacity-002-test.html(0/1)0.00%FAIL
filters-sepia-001-test.html(0/1)0.00%FAIL
filters-test-brightness-001.html(1/1)100.00%PASS
filters-test-brightness-002.html(0/1)0.00%FAIL
filters-test-brightness-003.html(1/1)100.00%PASS
fixed-pos-filter-clip-001.html(1/1)100.00%PASS
fixed-pos-filter-clip-002.html(1/1)100.00%PASS
hidpi-invert-filter-background.html(0/1)0.00%FAIL
idlharness.any.html(27/484)5.58%FAIL
idlharness.any.worker.html(0/54)0.00%MISSING
inheritance.html(4/12)33.33%FAIL
invalidation-css-dropshadow-002.html(0/1)0.00%FAIL
kernel-unit-length-001.html(1/1)100.00%PASS
kernel-unit-length-002.html(1/1)100.00%PASS
lighting-region.html(0/1)0.00%FAIL
limiting-cone-angle.html(1/1)100.00%PASS
morphology-mirrored.html(0/1)0.00%FAIL
reference-filter-update-on-attribute-change-001.html(1/1)100.00%PASS
remove-filter-repaint.html(1/1)100.00%PASS
repaint-added-backdrop-filter.html(0/1)0.00%FAIL
root-element-with-opacity-filter-001.html(1/1)100.00%PASS
svg-empty-container-with-filter-content-added.html(1/1)100.00%PASS
svg-empty-element-with-filter-001.html(1/1)100.00%PASS
svg-empty-hidden-foreignobject-with-filter-001.html(0/1)0.00%FAIL
svg-external-filter-resource.html(0/1)0.00%FAIL
svg-feflood-001.html(0/1)0.00%FAIL
svg-feimage-001.html(0/1)0.00%FAIL
svg-feimage-002.html(0/1)0.00%FAIL
svg-feimage-003.html(0/1)0.00%FAIL
svg-feimage-004.html(0/1)0.00%FAIL
svg-feimage-005.html(0/1)0.00%FAIL
svg-feoffset-001.html(0/1)0.00%FAIL
svg-filter-filter-units-user-space.html(0/1)0.00%FAIL
svg-filter-gradient-interpolation.html(1/1)100.00%PASS
svg-filter-primitive-units-user-space.html(0/1)0.00%FAIL
svg-filter-user-space-viewport-change.html(0/1)0.00%FAIL
svg-filter-vs-clip-path.html(1/1)100.00%PASS
svg-filter-vs-mask.html(1/1)100.00%PASS
svg-image-root-filter.html(1/1)100.00%PASS
svg-multiple-filter-functions.html(0/1)0.00%FAIL
svg-mutation-drop-shadow-color.html(0/1)0.00%FAIL
svg-mutation-drop-shadow-offset.html(0/1)0.00%FAIL
svg-mutation-fedropshadow-stddeviation.html(1/1)100.00%PASS
svg-mutation-filter-used-by-mask.html(1/1)100.00%PASS
svg-mutation-function-to-url.html(0/1)0.00%FAIL
svg-mutation-group-position-changed.html(0/1)0.00%FAIL
svg-mutation-group-size-changed.html(0/1)0.00%FAIL
svg-mutation-group-transform-changed.html(0/1)0.00%FAIL
svg-mutation-object-position-changed.html(0/1)0.00%FAIL
svg-mutation-object-size-changed.html(0/1)0.00%FAIL
svg-mutation-object-transform-changed.html(0/1)0.00%FAIL
svg-mutation-single-to-multiple-001.html(0/1)0.00%FAIL
svg-mutation-single-to-multiple-002.html(0/1)0.00%FAIL
svg-mutation-url-to-function.html(0/1)0.00%FAIL
svg-relative-urls-001.html(0/1)0.00%FAIL
svg-relative-urls-002.html(1/1)100.00%PASS
svg-shorthand-drop-shadow-001.html(0/1)0.00%FAIL
svg-shorthand-hue-rotate-001.html(0/1)0.00%FAIL
svg-sourcegraphic-currentcolor-dynamic-001.html(0/1)0.00%FAIL
svg-sourcegraphic-invalidation-001.html(1/1)100.00%PASS
svg-unknown-input-001.html(0/1)0.00%FAIL
svg-unknown-input-002.html(0/1)0.00%FAIL
svg-unused-filter-on-clippath-mutated-crash.html(1/1)100.00%PASS
svg-visibility-hidden-element-with-filter-001.html(0/1)0.00%FAIL
svg-visibility-hidden-element-with-filter-002.html(0/1)0.00%FAIL
svg-visibility-hidden-element-with-filter-003.html(0/1)0.00%FAIL
svgfeblendelement-mode-001.html(0/35)0.00%FAIL
tainting-css-dropshadow-001.html(0/1)0.00%FAIL
tainting-css-dropshadow-currentcolor.html(1/1)100.00%PASS
tainting-feblend-001.html(0/1)0.00%FAIL
tainting-feblend-002.html(1/1)100.00%PASS
tainting-fecomponenttransfer-001.html(0/1)0.00%FAIL
tainting-fecomponenttransfer-002.html(1/1)100.00%PASS
tainting-fecomposite-001.html(0/1)0.00%FAIL
tainting-fecomposite-002.html(1/1)100.00%PASS
tainting-feconvolvematrix-001.html(0/1)0.00%FAIL
tainting-feconvolvematrix-002.html(1/1)100.00%PASS
tainting-fediffuselighting-001.html(0/1)0.00%FAIL
tainting-fediffuselighting-002.html(1/1)100.00%PASS
tainting-fediffuselighting-003.html(1/1)100.00%PASS
tainting-fediffuselighting-004.html(1/1)100.00%PASS
tainting-fediffuselighting-dynamic-001.html(1/1)100.00%PASS
tainting-fediffuselighting-dynamic-002.html(1/1)100.00%PASS
tainting-fedisplacementmap-001.html(0/1)0.00%FAIL
tainting-fedisplacementmap-002.html(1/1)100.00%PASS
tainting-fedropshadow-001.html(0/1)0.00%FAIL
tainting-fedropshadow-002.html(1/1)100.00%PASS
tainting-fedropshadow-003.html(1/1)100.00%PASS
tainting-fedropshadow-004.html(1/1)100.00%PASS
tainting-feflood-001.html(0/1)0.00%FAIL
tainting-feflood-002.html(1/1)100.00%PASS
tainting-feflood-003.html(1/1)100.00%PASS
tainting-feflood-004.html(1/1)100.00%PASS
tainting-feflood-005.html(1/1)100.00%PASS
tainting-feflood-006.html(1/1)100.00%PASS
tainting-feflood-007.html(0/1)0.00%FAIL
tainting-feflood-008.html(0/1)0.00%FAIL
tainting-feflood-009.html(0/1)0.00%FAIL
tainting-feflood-dynamic-001.html(1/1)100.00%PASS
tainting-feflood-dynamic-002.html(1/1)100.00%PASS
tainting-fegaussianblur-001.html(0/1)0.00%FAIL
tainting-fegaussianblur-002.html(1/1)100.00%PASS
tainting-femorphology-001.html(0/1)0.00%FAIL
tainting-femorphology-002.html(1/1)100.00%PASS
tainting-feoffset-001.html(0/1)0.00%FAIL
tainting-feoffset-002.html(1/1)100.00%PASS
tainting-fespecularlighting-001.html(0/1)0.00%FAIL
tainting-fespecularlighting-002.html(1/1)100.00%PASS
tainting-fespecularlighting-003.html(1/1)100.00%PASS
tainting-fespecularlighting-004.html(1/1)100.00%PASS
tainting-fetile-001.html(0/1)0.00%FAIL
tainting-fetile-002.html(1/1)100.00%PASS
visibility-hidden-element-with-filter-001.html(0/1)0.00%FAIL
will-change-blur-filter-under-clip.html(1/1)100.00%PASS