| <!doctype html> |
| <meta charset="utf-8"> |
| <style> |
| .target { |
| border: 3px solid skyblue; |
| width: 100px; |
| height: 100px; |
| background-image: linear-gradient(to right, coral, coral); |
| background-size: 20px 20px; |
| background-repeat: no-repeat; |
| display: inline-block; |
| } |
| |
| .replica { |
| margin-right: 10px; |
| } |
| </style> |
| <body> |
| <script src="resources/interpolation-test.js"></script> |
| <script> |
| |
| // left-top |
| assertInterpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'left 20px top 20px', |
| }, [ |
| {at: 0, is: '50% 50%'}, |
| {at: 0.25, is: 'calc(37.5% + 5px) calc(37.5% + 5px)'}, |
| {at: 0.50, is: 'calc(25% + 10px) calc(25% + 10px)'}, |
| {at: 0.75, is: 'calc(12.5% + 15px) calc(12.5% + 15px)'}, |
| {at: 1, is: '20px 20px'}, |
| ]); |
| |
| // center-top |
| assertInterpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'center top 20px', |
| }, [ |
| {at: 0, is: '50% 50%'}, |
| {at: 0.25, is: '50% calc(37.5% + 5px)'}, |
| {at: 0.50, is: '50% calc(25% + 10px)'}, |
| {at: 0.75, is: '50% calc(12.5% + 15px)'}, |
| {at: 1, is: '50% 20px'}, |
| ]); |
| |
| // right-top |
| assertInterpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'right 20px top 20px', |
| }, [ |
| {at: 0, is: '50% 50%'}, |
| {at: 0.25, is: 'calc(37.5% + ((100% - 20px) * 0.25)) calc(37.5% + 5px)'}, |
| {at: 0.50, is: 'calc(25% + ((100% - 20px) * 0.5)) calc(25% + 10px)'}, |
| {at: 0.75, is: 'calc(12.5% + ((100% - 20px) * 0.75)) calc(12.5% + 15px)'}, |
| {at: 1, is: 'calc(100% - 20px) 20px'}, |
| ]); |
| |
| // left-center |
| assertInterpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'left 20px center', |
| }, [ |
| {at: 0, is: '50% 50%'}, |
| {at: 0.25, is: 'calc(37.5% + 5px) 50%'}, |
| {at: 0.50, is: 'calc(25% + 10px) 50%'}, |
| {at: 0.75, is: 'calc(12.5% + 15px) 50%'}, |
| {at: 1, is: '20px 50%'}, |
| ]); |
| |
| // center-center |
| assertInterpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'center center', |
| }, [ |
| {at: 0, is: '50% 50%'}, |
| {at: 0.25, is: '50% 50%'}, |
| {at: 0.50, is: '50% 50%'}, |
| {at: 0.75, is: '50% 50%'}, |
| {at: 1, is: '50% 50%'} |
| ]); |
| |
| // right-center |
| assertInterpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'right 20px center', |
| }, [ |
| {at: 0, is: '50% 50%'}, |
| {at: 0.25, is: 'calc(37.5% + ((100% - 20px) * 0.25)) 50%'}, |
| {at: 0.50, is: 'calc(25% + ((100% - 20px) * 0.5)) 50%'}, |
| {at: 0.75, is: 'calc(12.5% + ((100% - 20px) * 0.75)) 50%'}, |
| {at: 1, is: 'calc(100% - 20px) 50%'}, |
| ]); |
| |
| // left-bottom |
| assertInterpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'left 20px bottom 20px', |
| }, [ |
| {at: 0, is: '50% 50%'}, |
| {at: 0.25, is: 'calc(37.5% + 5px) calc(37.5% + ((100% - 20px) * 0.25))'}, |
| {at: 0.50, is: 'calc(25% + 10px) calc(25% + ((100% - 20px) * 0.5))'}, |
| {at: 0.75, is: 'calc(12.5% + 15px) calc(12.5% + ((100% - 20px) * 0.75))'}, |
| {at: 1, is: '20px calc(100% - 20px)'}, |
| ]); |
| |
| // center-bottom |
| assertInterpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'center bottom 20px', |
| }, [ |
| {at: 0, is: '50% 50%'}, |
| {at: 0.25, is: '50% calc(37.5% + ((100% - 20px) * 0.25))'}, |
| {at: 0.50, is: '50% calc(25% + ((100% - 20px) * 0.5))'}, |
| {at: 0.75, is: '50% calc(12.5% + ((100% - 20px) * 0.75))'}, |
| {at: 1, is: '50% calc(100% - 20px)'}, |
| ]); |
| |
| // right-bottom |
| assertInterpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'right 20px bottom 20px', |
| }, [ |
| {at: 0, is: '50% 50%'}, |
| {at: 0.25, is: 'calc(37.5% + ((100% - 20px) * 0.25)) calc(37.5% + ((100% - 20px) * 0.25))'}, |
| {at: 0.50, is: 'calc(25% + ((100% - 20px) * 0.5)) calc(25% + ((100% - 20px) * 0.5))'}, |
| {at: 0.75, is: 'calc(12.5% + ((100% - 20px) * 0.75)) calc(12.5% + ((100% - 20px) * 0.75))'}, |
| {at: 1, is: 'calc(100% - 20px) calc(100% - 20px)'}, |
| ]); |
| |
| </script> |
| </body> |
