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| FAIL animationstart event is instanceof AnimationEvent assert_idl_attribute: animationstart has pseudoElement property property "pseudoElement" not found in prototype chain |
| FAIL animationend event is instanceof AnimationEvent assert_idl_attribute: animationstart has pseudoElement property property "pseudoElement" not found in prototype chain |
| FAIL animationiteration event is instanceof AnimationEvent assert_idl_attribute: animationstart has pseudoElement property property "pseudoElement" not found in prototype chain |
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