| <!DOCTYPE html> | |
| <script src="../../resources/testharness.js"></script> | |
| <script src="../../resources/testharnessreport.js"></script> | |
| <script> | |
| test(() => { | |
| assert_throws_js(TypeError, () => { | |
| document.body.animate({left: [{toString:null}]}); | |
| }); | |
| }, 'Do not crash when passing an unstringable value in a property indexed keyframe'); | |
| </script> |