Disable assert and remove use of hasOwnProperty -- they are slow
Disable assert and remove use of hasOwnProperty -- they are slow

beni55/web-animations-js-legacy,birtles/web-animations-js,birtles/web-animations-js,web-animations/web-animations-js-legacy,beni55/web-animations-js-legacy,birtles/web-animations-js,web-animations/web-animations-js-legacy,web-animations/web-animations-js-legacy,beni55/web-animations-js-legacy,beni55/web-animations-js-legacy