K.canPlayType can be undefined fixed issue
#15
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K.canPlayTypecan be undefined witch can lead to an crash on old browsers.While it was:
b=K.canPlayType(a)||!1so whenK.canPlayType(a)does not return a value!1would be used.I updated it to
b=K.canPlayType===t?!1:K.canPlayType(a)||!1so whenK.canPlayTypeis undefined (known ast) the value!1would be used.