| <!DOCTYPE html> |
| <meta charset="UTF-8"> |
| <title>opacity interpolation</title> |
| <link rel="help" href="https://drafts.csswg.org/css-color-3/#opacity"> |
| <meta name="assert" content="opacity supports animation"> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/support/interpolation-testcommon.js"></script> |
| |
| <style> |
| .parent { |
| opacity: 0.8; |
| } |
| |
| .target { |
| width: 100px; |
| height: 100px; |
| background-color: black; |
| display: inline-block; |
| opacity: 0.1; |
| } |
| |
| .expected { |
| background-color: green; |
| } |
| </style> |
| |
| <body> |
| <script> |
| test_interpolation({ |
| property: 'opacity', |
| from: neutralKeyframe, |
| to: '0.2', |
| }, [ |
| {at: -0.3, expect: '0.07'}, |
| {at: 0, expect: '0.1'}, |
| {at: 0.3, expect: '0.13'}, |
| {at: 0.6, expect: '0.16'}, |
| {at: 1, expect: '0.2'}, |
| {at: 1.5, expect: '0.25'}, |
| ]); |
| |
| test_interpolation({ |
| property: 'opacity', |
| from: 'initial', |
| to: '0.2', |
| }, [ |
| {at: -0.3, expect: '1'}, |
| {at: 0, expect: '1'}, |
| {at: 0.3, expect: '0.76'}, |
| {at: 0.6, expect: '0.52'}, |
| {at: 1, expect: '0.2'}, |
| {at: 1.5, expect: '0'}, |
| ]); |
| |
| test_interpolation({ |
| property: 'opacity', |
| from: 'inherit', |
| to: '0.2', |
| }, [ |
| {at: -0.3, expect: '0.98'}, |
| {at: 0, expect: '0.8'}, |
| {at: 0.3, expect: '0.62'}, |
| {at: 0.6, expect: '0.44'}, |
| {at: 1, expect: '0.2'}, |
| {at: 1.5, expect: '0'}, |
| ]); |
| |
| test_interpolation({ |
| property: 'opacity', |
| from: 'unset', |
| to: '0.2', |
| }, [ |
| {at: -0.3, expect: '1'}, |
| {at: 0, expect: '1'}, |
| {at: 0.3, expect: '0.76'}, |
| {at: 0.6, expect: '0.52'}, |
| {at: 1, expect: '0.2'}, |
| {at: 1.5, expect: '0'}, |
| ]); |
| |
| test_interpolation({ |
| property: 'opacity', |
| from: '0', |
| to: '1' |
| }, [ |
| {at: -0.3, expect: '0'}, // CSS opacity is [0-1]. |
| {at: 0, expect: '0'}, |
| {at: 0.3, expect: '0.3'}, |
| {at: 0.6, expect: '0.6'}, |
| {at: 1, expect: '1'}, |
| {at: 1.5, expect: '1'} |
| ]); |
| </script> |
| </body> |