Window.external is null

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Why Request. HasFile always return false. Web browser control issue:. Represents an event handler that will run when a display is able to be presented to when the vrdisplayactivate event fires , for example if an HMD has been moved to bring it out of standby, or woken up by being put on. Represents an event handler that will run when a display can no longer be presented to when the vrdisplaydeactivate event fires , for example if an HMD has gone into standby or sleep mode due to a period of inactivity.

Represents an event handler that will run when presentation to a display has been paused for some reason by the browser, OS, or VR hardware when the vrdisplayblur event fires — for example, while the user is interacting with a system menu or browser, to prevent tracking or loss of experience.

Represents an event handler that will run when presentation to a display has resumed after being blurred when the vrdisplayfocus event fires. Called when the loading of a resource has been aborted, such as by a user canceling the load while it is still in progress. Called when the print dialog box is closed. See afterprint event. Called when the print dialog box is opened. See beforeprint event. Called when a resource fails to load OR when an error occurs at runtime.

See error event. Called after the window receives or regains focus. See focus events. An event handler property for hashchange events on the window; called when the part of the URL after the hash mark " " changes. Called when you begin pressing ANY key. See keydown event. Called when a key except Shift, Fn, and CapsLock is in pressed position.

See keypress event. Called when you finish releasing ANY key. See keyup event. An event handler property for languagechange events on the window. Called after all resources and the DOM are fully loaded. Is an event handler representing the code to be called when the message event is raised. Called when network connection is lost. See offline event.

Called when network connection is established. See online event. Called when the user navigates away from the page, before the onunload event. See pagehide event. See pageshow event. Called when the scroll bar is moved via ANY means. If the resource fully fits in the window, then this event cannot be invoked. Is an event handler representing the code to be called when the selectionchange event is raised. Called when there is a change in session storage or local storage.

See storage event. An event handler for unhandled Promise rejection events. Listen to these events using addEventListener or by assigning an event listener to the oneventname property of this interface. Fired when a resource failed to load, or can't be used.

For example, if a script has an execution error or an image can't be found or is invalid. Also available via the onerror property. Fired at the global scope object when the user's preferred language changes.

Also available via the onlanguagechange property. Fired when the orientation of the device has changed. Also available via the onorientationchange property. Fired at a regular interval, indicating the amount of physical force of acceleration the device is receiving and the rate of rotation, if available.

Fired when fresh data is available from the magnetometer orientation sensor about the current orientation of the device as compared to the Earth coordinate frame. Fired when the window has been resized. Also available via the onresize property. Fired when a storage area localStorage or sessionStorage has been modified in the context of another document. Also available via the onstorage property. Fired when an animation unexpectedly aborts. Also available via the onanimationcancel property.

Fired when an animation has completed normally. Also available via the onanimationend property. Fired when an animation iteration has completed. Also available via the onanimationiteration property. Fired when an animation starts. Also available via the onanimationstart property. Fired when the user initiates a copy action through the browser's user interface.

Also available via the oncopy property. Fired when the user initiates a cut action through the browser's user interface. Also available via the oncut property. Fired when the user initiates a paste action through the browser's user interface.

Also available via the onpaste property. Fired when the browser has lost access to the network and the value of navigator. Also available via the onoffline property. Fired when the browser has gained access to the network and the value of navigator. Also available via the ononline property. Fired when an element has lost focus. Also available via the onblur property. Fired when an element has gained focus.

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