JS 判断list中是否存在某个元素

例如：

$(['temporaryCooperation', 'effective', 'restrictionCompletion', 'rejected', 'submitted']).contains("submitted")
==> true

$([0,1,2,3,4,5]).contains(0)
==> true

$([0,1,2,3,4,5]).contains(10)
==> false

a=[1,2,3,3,4,5,8]

$(a).contains(10)
==> false

$(a).contains(8)
==> true