On Thu, Nov 21, 2013 at 7:53 AM, Allen Wirfs-Brock <allen@xxxxxxxxxxxxxxx> wrote: > Just to be clear about this. My tests directly tested JavaScript built-in > JSON parsers WRT to BOM support in three major browsers. The tests directly > invoked the built-in JSON.parse functions and directly passed to them a > source strings that was explicitly constructed to contain a BOM code point . > This was done to ensure that the all transport layers (and any transcodings > they might perform) were bypassed and that we were actually testing the real > built-in JSON parse functions. It would be surprising if JSON.parse() accepted a BOM, since it doesn't take bytes as input. However, XHR's responseType = "json" exercises browsers in a way where the input is bytes from the network. From the perspective of JSON support in XHR, http://lists.w3.org/Archives/Public/www-tag/2013Nov/0149.html (which didn't reach the es-discuss part of this thread previously) applies. -- Henri Sivonen hsivonen@xxxxxxxxxxx http://hsivonen.fi/