This article is in need of a technical review.
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
Note: In a GSM network the dialer observes call operations from RIL call state changes; however, in a CDMA network RIL call states do not change under some call operations, so HFP devices need this additional method to have the dialer to be informed of the operation.
var request = instanceOfBluetoothAdapter.toggleCalls();
DOMRequest object to handle the success or error of the operation.
Not part of any specification yet. It should be discussed as part of the W3C's System Applications Working Group.