ReadonlyAT_ReadonlybubblesThe bubbles read-only property of the Event interface indicates whether the event bubbles up through the DOM tree or not.
ReadonlyBUBBLING_ReadonlycancelableThe cancelable read-only property of the Event interface indicates whether the event can be canceled, and therefore prevented as if the event never happened.
The cancelBubble property of the Event interface is deprecated. Use Event.stopPropagation() instead. Setting its value to true before returning from an event handler prevents propagation of the event. In later implementations, setting this to false does nothing. See Browser compatibility for details.
ReadonlyCAPTURING_ReadonlycomposedThe read-only composed property of the Event interface returns a boolean value which indicates whether or not the event will propagate across the shadow DOM boundary into the standard DOM.
ReadonlycurrentThe currentTarget read-only property of the Event interface identifies the element to which the event handler has been attached.
ReadonlydefaultThe defaultPrevented read-only property of the Event interface returns a boolean value indicating whether or not the call to Event.preventDefault() canceled the event.
ReadonlyeventThe eventPhase read-only property of the Event interface indicates which phase of the event flow is currently being evaluated.
ReadonlyisThe isTrusted read-only property of the Event interface is a boolean value that is true when the event was generated by the user agent (including via user actions and programmatic methods such as HTMLElement.focus()), and false when the event was dispatched via EventTarget.dispatchEvent(). The only exception is the click event, which initializes the isTrusted property to false in user agents.
ReadonlyNONEThe Event property returnValue indicates whether the default action for this event has been prevented or not.
ReadonlysrcThe deprecated Event.srcElement is an alias for the Event.target property. Use Event.target instead.
ReadonlytargetThe read-only target property of the Event interface is a reference to the object onto which the event was dispatched. It is different from Event.currentTarget when the event handler is called during the bubbling or capturing phase of the event.
ReadonlytimeThe timeStamp read-only property of the Event interface returns the time (in milliseconds) at which the event was created.
ReadonlytypeThe type read-only property of the Event interface returns a string containing the event's type. It is set when the event is constructed and is the name commonly used to refer to the specific event, such as click, load, or error.
The composedPath() method of the Event interface returns the event's path which is an array of the objects on which listeners will be invoked. This does not include nodes in shadow trees if the shadow root was created with its ShadowRoot.mode closed.
The preventDefault() method of the Event interface tells the user agent that the event is being explicitly handled, so its default action, such as page scrolling, link navigation, or pasting text, should not be taken.
The stopImmediatePropagation() method of the Event interface prevents other listeners of the same event from being called.
The stopPropagation() method of the Event interface prevents further propagation of the current event in the capturing and bubbling phases. It does not, however, prevent any default behaviors from occurring; for instance, clicks on links are still processed. If you want to stop those behaviors, see the preventDefault() method. It also does not prevent propagation to other event-handlers of the current element. If you want to stop those, see stopImmediatePropagation().
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Eventinterface represents an event which takes place on an EventTarget.MDN Reference