I would expect $.isArray to return true for the new typed array objects - eg Float32Array and Int16Array, etc. In actual fact, all return false:

$.isArray(new Array(1));

true

$.isArray(new Float32Array(1));

false

$.isArray(new Float64Array(1));

false

$.isArray(new Int8Array(1));

false

$.isArray(new Int16Array(1));

false

$.isArray(new Int32Array(1));

false

However, it might be deliberate behaviour to return false, because typed arrays don't support all the same functions as standard arrays - eg push, pop, map etc. If so, this behaviour should be documented.