| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Compositing and Blending Level 1: getComputedStyle().backgroundBlendMode</title> |
| <link rel="help" href="https://drafts.fxtf.org/compositing-1/#propdef-background-blend-mode"> |
| <meta name="assert" content="background-blend-mode computed value is as specified."> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/support/computed-testcommon.js"></script> |
| </head> |
| <body> |
| <div id="target"></div> |
| <script> |
| test_computed_value("background-blend-mode", "normal"); |
| test_computed_value("background-blend-mode", "multiply"); |
| test_computed_value("background-blend-mode", "screen"); |
| test_computed_value("background-blend-mode", "overlay"); |
| test_computed_value("background-blend-mode", "darken"); |
| test_computed_value("background-blend-mode", "lighten"); |
| test_computed_value("background-blend-mode", "color-dodge"); |
| test_computed_value("background-blend-mode", "color-burn"); |
| test_computed_value("background-blend-mode", "hard-light"); |
| test_computed_value("background-blend-mode", "soft-light"); |
| test_computed_value("background-blend-mode", "difference"); |
| test_computed_value("background-blend-mode", "exclusion"); |
| test_computed_value("background-blend-mode", "hue"); |
| test_computed_value("background-blend-mode", "saturation"); |
| test_computed_value("background-blend-mode", "color"); |
| test_computed_value("background-blend-mode", "luminosity"); |
| |
| // Per spec, excess values should not be used, |
| // BUT the computed style should be similar to the specified values. |
| // see https://drafts.fxtf.org/compositing-1/#background-blend-mode |
| // and https://drafts.csswg.org/css-backgrounds-3/#layering |
| // > The lists are matched up from the first value: excess values at the end are not used. |
| // but in https://drafts.csswg.org/css-values-4/#linked-properties |
| // it was decided that |
| // > The computed values of the coordinating list properties are not affected by such truncation or repetition. |
| // |
| // There is a distinction between specified values, used values, and computed values. |
| |
| test_computed_value("background-blend-mode", "normal, luminosity"); |
| test_computed_value("background-blend-mode", "screen, overlay"); |
| test_computed_value("background-blend-mode", "color, saturation"); |
| </script> |
| </body> |
| </html> |
