css/motion/animation/offset-interpolation.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <link rel="help" href="https://drafts.fxtf.org/motion-1/#offset-shorthand">
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <script src="/css/support/interpolation-testcommon.js"></script>
  </head>
  <body>
    <script>
      test_interpolation({
        property: 'offset',
        from: 'path("M0 200H 700") 500px 800deg',
        to: 'path("M0 300H 700 Z") 600px 900deg',
        method: 'CSS Transitions',
      }, [
        {at: -0.3, expect: 'path("M0 300H 700 Z") 470px 770deg'},
        {at: 0, expect: 'path("M0 300H 700 Z") 500px 800deg'},
        {at: 0.3, expect: 'path("M0 300H 700 Z") 530px 830deg'},
        {at: 0.6, expect: 'path("M0 300H 700 Z") 560px 860deg'},
        {at: 1, expect: 'path("M0 300H 700 Z") 600px 900deg'},
        {at: 1.5, expect: 'path("M0 300H 700 Z") 650px 950deg'},
      ]);

      test_interpolation({
        property: 'offset',
        from: 'path("M0 0H 200") 500px auto',
        to: 'path("M0 0H 300") 600px 0deg',
        method: 'CSS Transitions',
      }, [
        {at: -0.3, expect: 'path("M0 0H 170") 470px 0deg'},
        {at: 0, expect: 'path("M0 0H 200") 500px 0deg'},
        {at: 0.3, expect: 'path("M0 0H 230") 530px 0deg'},
        {at: 0.6, expect: 'path("M0 0H 260") 560px 0deg'},
        {at: 1, expect: 'path("M0 0H 300") 600px 0deg'},
        {at: 1.5, expect: 'path("M0 0H 350") 650px 0deg'},
      ]);

      test_interpolation({
        property: 'offset',
        from: 'path("M0 200H 700") 500px 800deg',
        to: 'path("M0 300H 700 Z") 600px 900deg',
        method: 'CSS Animations',
      }, [
        {at: -0.3, expect: 'path("M0 200H 700") 470px 770deg'},
        {at: 0, expect: 'path("M0 200H 700") 500px 800deg'},
        {at: 0.3, expect: 'path("M0 200H 700") 530px 830deg'},
        {at: 0.6, expect: 'path("M0 300H 700 Z") 560px 860deg'},
        {at: 1, expect: 'path("M0 300H 700 Z") 600px 900deg'},
        {at: 1.5, expect: 'path("M0 300H 700 Z") 650px 950deg'},
      ]);

      test_interpolation({
        property: 'offset',
        from: 'path("M0 0H 200") 500px auto',
        to: 'path("M0 0H 300") 600px 0deg',
        method: 'CSS Animations',
      }, [
        {at: -0.3, expect: 'path("M0 0H 170") 470px'},
        {at: 0, expect: 'path("M0 0H 200") 500px'},
        {at: 0.3, expect: 'path("M0 0H 230") 530px'},
        {at: 0.6, expect: 'path("M0 0H 260") 560px 0deg'},
        {at: 1, expect: 'path("M0 0H 300") 600px 0deg'},
        {at: 1.5, expect: 'path("M0 0H 350") 650px 0deg'},
      ]);

      test_interpolation({
        property: 'offset',
        from: 'path("M0 200H 700") 500px 800deg',
        to: 'path("M0 300H 700 Z") 600px 900deg',
        method: 'Web Animations',
      }, [
        {at: -0.3, expect: 'path("M0 200H 700") 470px 770deg'},
        {at: 0, expect: 'path("M0 200H 700") 500px 800deg'},
        {at: 0.3, expect: 'path("M0 200H 700") 530px 830deg'},
        {at: 0.6, expect: 'path("M0 300H 700 Z") 560px 860deg'},
        {at: 1, expect: 'path("M0 300H 700 Z") 600px 900deg'},
        {at: 1.5, expect: 'path("M0 300H 700 Z") 650px 950deg'},
      ]);

      test_interpolation({
        property: 'offset',
        from: 'path("M0 0V 200") 500px auto',
        to: 'path("M0 0H 300") 600px 0deg',
        method: 'Web Animations',
      }, [
        {at: -0.3, expect: 'path("M0 0V 200") 470px'},
        {at: 0, expect: 'path("M0 0V 200") 500px'},
        {at: 0.3, expect: 'path("M0 0V 200") 530px'},
        {at: 0.6, expect: 'path("M0 0H 300") 560px 0deg'},
        {at: 1, expect: 'path("M0 0H 300") 600px 0deg'},
        {at: 1.5, expect: 'path("M0 0H 300") 650px 0deg'},
      ]);
    </script>
  </body>
</html>