Deprecations and removals in Chrome 66
ImageCapture.setOptions() removed
Current thinking on setting device options is to use the constrainable pattern . Consequently this property was removed from the ImageCapture specification . Since this method appears to have little to no use on production websites, it is being removed. A replacement method is not available at this time.
Intent to Remove | Chromestatus Tracker | Chromium Bug
Service worker: disallow CORS responses for same-origin requests
Previous versions of the service worker specification allowed a service worker
to return a CORS response to a same-origin request. The thinking was that the
service worker could read from a CORS response to create a completely synthetic
response. In spite of this, the original request URL was maintained in the
response. So outerResponse.url exactly equaled url and innerResponse.url
exactly equaled crossOriginURL.
A recent change to the Fetch specification
requires that Response.url be exposed if it is present. A consequence of this
is scenarios in which self.location.href returns a different origin than
self.origin. To avoid this, service workers are no longer allowed to return
CORS responses for same origin requests.
For a longer discussion on this change, see the issue filed agains the Fetch specification in November 2017.
Chromestatus Tracker | Chromium Bug
WebAudio: dezippering removed
Web audio originally shipped with dezippering support. When an AudioParam value was set directly with the value setter, the value was not updated immediately. Instead, an exponential smoother was applied with a time constant of about 10 ms so that the change was done smoothly, limiting glitches. It was never specified which parameters had smoothing and what the time constant was. It wasn’t even obvious if the actual time constant was the appropriate value.
After much discussion
, the working group removed dezippering from the spec. Now, the value is changed
immediately when set. In place of dezippering, it is recommended that developers
use the existing AudioParam.setTargetAtTime() method to do the dezippering,
giving you full control on when to apply it, how fast to change, and on which
parameters should be smoothed.
Removing this reduces developer confusion which audio parameters support dezippering.
Intent to Remove | Chromestatus Tracker | Chromium Bug
CSS position values with three parts deprecated
Recently specifications have required that new properties accepting position values not support values with three parts. It's believed this approach makes processing shorthand syntax easier. The current version of the CSS Values and Units Module applies this requirement to all CSS position values. As of Chrome 66, three-part position values are deprecated. Removal is expected in Chrome 68, around July 2018.
Intent to Remove | Chromestatus Tracker | Chromium Bug
Methods document.createTouch(), document.createTouchList() are deprecated
The TouchEvent() constructor has been
supported in Chrome
since version 48. To comply with the specification, document.createTouch() and
document.createTouchList() are now deprecated.