1. Rest parameters

    Allows representation of an indefinite number of arguments as an array.

  2. htmlmeterelement api: low

  3. reportingobserver api: `reportingobserver()` constructor: `options` parameter: `types` property: `connection-allowlist` report type

  4. selection api: containsnode: `allowpartialcontainment` parameter is optional

  5. websocket api: `websocket()` constructor: `url` parameter allows `https`, `http`, and relative urls

  6. webtransport api: `webtransport()` constructor: `options.allowpooling` parameter

  7. html element: iframe: allow: accelerometer

  8. html element: iframe: allow: magnetometer

  9. html element: meter: low

  10. javascript built-in: string: tolocalelowercase: `locales` parameter