Readonly heightThe height of the screen in CSS pixels.
Readonly widthThe width of the screen in CSS pixels.
Appends an event listener for events whose type attribute value is type. The callback argument sets the callback that will be invoked when the event is dispatched.
The options argument sets listener-specific options. For compatibility this can be a boolean, in which case the method behaves exactly as if the value was specified as options's capture.
When set to true, options's capture prevents callback from being invoked when the event's eventPhase attribute value is BUBBLING_PHASE. When false (or not present), callback will not be invoked when event's eventPhase attribute value is CAPTURING_PHASE. Either way, callback will be invoked if event's eventPhase attribute value is AT_TARGET.
When set to true, options's passive indicates that the callback will not cancel the event by invoking preventDefault(). This is used to enable performance optimizations described in ยง 2.8 Observing event listeners.
When set to true, options's once indicates that the callback will only be invoked once after which the event listener will be removed.
If an AbortSignal is passed for options's signal, then the event listener will be removed when signal is aborted.
The event listener is appended to target's event listener list and is not appended if it has the same type, callback, and capture.
Optional options: boolean | AddEventListenerOptionsOptional options: boolean | AddEventListenerOptionsDispatches a synthetic event event to target and returns true if either event's cancelable attribute value is false or its preventDefault() method was not invoked, and false otherwise.
Removes the event listener in target's event listener list with the same type, callback, and options.
Optional options: boolean | EventListenerOptionsCreates a Blob object representing the image contained on the screen.
A callback function with the resulting Blob object as a single argument. null may be passed if the image cannot be created for any reason.
A string indicating the image format. The default type is image/png. This image format will be also used if the specified type is not supported.
A number between 0 and 1 indicating the image quality to be used when creating images using file formats that support lossy compression (such as image/jpeg). A user agent will use its default quality value if this option is not specified, or if the number is outside the allowed range.
screen.toBlob(blob => {
blob.arrayBuffer().then(buffer => {
Switch.writeFileSync('out.png', buffer);
});
});
Returns a data: URL containing a representation of the image in the format specified by the type parameter.
A string indicating the image format. The default type is image/png. This image format will be also used if the specified type is not supported.
A number between 0 and 1 indicating the image quality to be used when creating images using file formats that support lossy compression (such as image/jpeg). The default quality value will be used if this option is not specified, or if the number is outside the allowed range.
const url = screen.toDataURL();
fetch(url)
.then(res => res.arrayBuffer())
.then(buffer => {
Switch.writeFileSync('out.png', buffer);
});
https://developer.mozilla.org/docs/Web/API/HTMLCanvasElement/toDataURL
Generated using TypeDoc
EventTarget is a DOM interface implemented by objects that can receive events and may have listeners for them.
See
https://developer.mozilla.org/docs/Web/API/EventTarget