Access Uint8Array in javascript ArrayBuffer

Those properties do not actually exist on the ArrayBuffer object. They are put there by the Dev Tools window for viewing the ArrayBuffer contents.

You need to actually create the TypedArray of your choice through its constructor syntax

new TypedArray(buffer [, byteOffset [, length]]);

So in your case if you want Uint8Array you would need to do:

var uint8View = new Uint8Array(arrayBuffer);