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The DataStoreCursor interface of the Data Store API represents a cursor that allows apps to iterate through a list of DataStoreTask objects representing the change history of the data store, for use when synchronizing the data.
API Data Store Data Store API Database DataStoreCursor Interface Non-standard Reference Référence Storage storage


The DataStoreTask interface of the Data Store API represents a record changed in the data store when a DataStoreCursor is used to iterate through the data store's change history.
API Data Store Data Store API Database DataStoreTask Interface Non-standard Reference Référence storage Storage


The DataTransfer object is used to hold the data that is being dragged during a drag and drop operation. It may hold one or more data items, each of one or more data types. For more information about drag and drop, see HTML Drag and Drop API.
API DataTransfer drag and drop HTML Drag and Drop API Interface NeedsMarkupWork Reference Web Development


The DataTransferItem object represents one drag data item. During a drag operation, each drag event has a dataTransfer property which contains a list of drag data items. Each item in the list is a DataTransferItem object.
API DataTransferItem drag and drop HTML DOM HTML Drag and Drop API Interface Reference


The DataTransferItemList object is a list of DataTransferItem objects representing items being dragged. During a drag operation, each DragEvent has a dataTransfer property and that property is a DataTransferItemList.
API DataTransferItemList drag and drop HTML DOM HTML Drag and Drop API Interface Reference


The ExtendableEvent interface extends the lifetime of the install and activate events dispatched on the global scope as part of the service worker lifecycle. This ensures that any functional events (like FetchEvent) are not dispatched until it upgrades database schemas and deletes the outdated cache entries.
API Experimental ExtendableEvent Interface Offline offline Reference Service Workers ServiceWorker Workers


The HMDVRDevice interface of the WebVR API represents a head mounted display, providing access to information about each eye, and allowing us to modify the current field of view.
API Experimental Expérimental HMDVRDevice Interface Obsolete Reference Référence Virtual Reality VR WebVR


The IDBEnvironment interface of the IndexedDB API contains the indexedDB property, which provides access to IndexedDB functionality. It is the top level IndexedDB interface implemented by the window and Worker objects.
access API asynchronous client-side Database DOM IDBEnvironment IndexedDB Interface Reference Référence Storage


A MediaQueryList object maintains a list of media queries on a document, and handles sending notifications to listeners when the media queries on the document change.
API CSSOM View Experimental Expérimental Interface NeedsMarkupWork NeedsMobileBrowserCompatibility NeedsSplit Reference Référence


The MediaRecorder interface of the MediaRecorder API provides functionality to easily record media. It is created by the invocation of the MediaRecorder() constructor.
API audio Audio Interface Media Capture Media Recorder API MediaRecorder Reference Video video


The MediaTrackConstraints dictionary is used to describe a set of capabilities and the value or values each can take on. A constraints dictionary is passed into applyConstraints() to allow a script to establish a set of ideal values and/or preferred ranges of values for the track, and the most recently-requested set of custom constraints can be retrieved by calling getConstraints().
API Dictionary Interface Media Capture and Streams API Media Streams API MediaTrackConstraints Reference


The MediaTrackSupportedConstraints dictionary establishes the list of constrainable properties recognized by the user agent or browser in its implementation of the MediaStreamTrack object. An object conforming to MediaTrackSupportedConstraints is returned by MediaDevices.getSupportedConstraints().
API Constraints Dictionary Interface Media Capture and Streams API Media Streams API MediaTrackSupportedConstraints Reference


The NavigatorConcurrentHardware mixin adds to the Navigator interface features which allow Web content to determine how many logical processors the user has available, in order to let content and Web apps optimize their operations to best take advantage of the user's CPU.
API Concurrency HTML DOM Interface Navigator NavigatorConcurrentHardware NeedsBrowserCompatibility Reference Threading Threads WorkerNavigator Workers