| <!DOCTYPE html> |
| <meta charset="UTF-8"> |
| <title>width interpolation</title> |
| <link rel="help" href="https://drafts.csswg.org/css-sizing-3/#propdef-width"> |
| <meta name="assert" content="width supports animation by computed value"> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/support/interpolation-testcommon.js"></script> |
| |
| <style> |
| .parent { |
| width: 100px; |
| overflow: visible; |
| } |
| .target { |
| font-size: 16px; |
| background-color: black; |
| width: 10px; |
| height: 10px; |
| } |
| .expected { |
| background-color: green; |
| } |
| </style> |
| |
| <body> |
| <template id="target-template"> |
| <div class="container"> |
| <div class="target"></div> |
| </div> |
| </template> |
| </body> |
| |
| <script> |
| test_interpolation({ |
| property: 'width', |
| from: neutralKeyframe, |
| to: '40px', |
| }, [ |
| {at: -0.3, expect: '1px'}, |
| {at: 0, expect: '10px'}, |
| {at: 0.3, expect: '19px'}, |
| {at: 0.6, expect: '28px'}, |
| {at: 1, expect: '40px'}, |
| {at: 1.5, expect: '55px'}, |
| ]); |
| |
| test_no_interpolation({ |
| property: 'width', |
| from: 'initial', |
| to: '40px', |
| }); |
| |
| test_interpolation({ |
| property: 'width', |
| from: 'inherit', |
| to: '40px', |
| }, [ |
| {at: -0.3, expect: '118px'}, |
| {at: 0, expect: '100px'}, |
| {at: 0.3, expect: '82px'}, |
| {at: 0.6, expect: '64px'}, |
| {at: 1, expect: '40px'}, |
| {at: 1.5, expect: '10px'}, |
| ]); |
| |
| test_no_interpolation({ |
| property: 'width', |
| from: 'unset', |
| to: '40px', |
| }); |
| |
| test_interpolation({ |
| property: 'width', |
| from: '0px', |
| to: '100px', |
| }, [ |
| {at: -0.3, expect: '0px'}, // CSS width can't be negative. |
| {at: 0, expect: '0px'}, |
| {at: 0.3, expect: '30px'}, |
| {at: 0.6, expect: '60px'}, |
| {at: 1, expect: '100px'}, |
| {at: 1.5, expect: '150px'} |
| ]); |
| |
| test_interpolation({ |
| property: 'width', |
| from: '10px', |
| to: '100%' |
| }, [ |
| {at: -0.3, expect: '0px'}, // CSS width can't be negative. |
| {at: 0, expect: '10px'}, |
| {at: 0.3, expect: '37px'}, |
| {at: 0.6, expect: '64px'}, |
| {at: 1, expect: '100px'}, |
| {at: 1.5, expect: '145px'} |
| ]); |
| |
| // The "vw" unit equals to 1% of the width of the viewport's initial containing |
| // block: |
| // https://developer.mozilla.org/en-US/docs/Web/CSS/length |
| function vw(x) { |
| return (x * window.innerWidth / 100); |
| } |
| |
| // In here, 16 is the font-size which is the value of 1em, and vw(10) is the |
| // value of 10vw. The calc here takes the "at" in the next interpolation test |
| // and computes the expected value. |
| function calc(x) { |
| return Math.max(16 + (vw(10) - 16) * x, 0).toFixed(2) + "px"; |
| } |
| |
| test_interpolation({ |
| property: 'width', |
| from: '1em', |
| to: '10vw' |
| }, [ |
| {at: -0.3, expect: calc(-0.3)}, |
| {at: 0, expect: calc(0)}, |
| {at: 0.3, expect: calc(0.3)}, |
| {at: 0.6, expect: calc(0.6)}, |
| {at: 1, expect: calc(1)}, |
| {at: 1.5, expect: calc(1.5)} |
| ]); |
| </script> |
| </body> |