Triggered before a render

Hierarchy (view full)

Properties

AT_TARGET
bubbles: boolean

Returns true or false depending on how event was initialized. True if event goes through its target's ancestors in reverse tree order, and false otherwise.

MDN Reference

BUBBLING_PHASE
cancelable: boolean

Returns true or false depending on how event was initialized. Its return value does not always carry meaning, but true can indicate that part of the operation during which event was dispatched, can be canceled by invoking the preventDefault() method.

MDN Reference

cancelBubble: boolean

MDN Reference

CAPTURING_PHASE
composed: boolean

Returns true or false depending on how event was initialized. True if event invokes listeners past a ShadowRoot node that is the root of its target, and false otherwise.

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currentTarget: EventTarget

Returns the object whose event listener's callback is currently being invoked.

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defaultPrevented: boolean

Returns true if preventDefault() was invoked successfully to indicate cancelation, and false otherwise.

MDN Reference

elapsed: number

time elapsed since the previous frame

eventPhase: number

Returns the event's phase, which is one of NONE, CAPTURING_PHASE, AT_TARGET, and BUBBLING_PHASE.

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isTrusted: boolean

Returns true if event was dispatched by the user agent, and false otherwise.

MDN Reference

NONE
returnValue: boolean

MDN Reference

srcElement: EventTarget

MDN Reference

target: Viewer

Returns the object to which event is dispatched (its target).

MDN Reference

timestamp: number

time provided by requestAnimationFrame

timeStamp: number

Returns the event's timestamp as the number of milliseconds measured relative to the time origin.

MDN Reference

type

Returns the type of event, e.g. "click", "hashchange", or "submit".

MDN Reference

AT_TARGET
BUBBLING_PHASE
CAPTURING_PHASE
NONE
type: "before-render" = 'before-render'

Methods

  • Returns the invocation target objects of event's path (objects on which listeners will be invoked), except for any nodes in shadow trees of which the shadow root's mode is "closed" that are not reachable from event's currentTarget.

    MDN Reference

    Returns EventTarget[]

  • Parameters

    • type: string
    • Optionalbubbles: boolean
    • Optionalcancelable: boolean

    Returns void

    MDN Reference

  • If invoked when the cancelable attribute value is true, and while executing a listener for the event with passive set to false, signals to the operation that caused event to be dispatched that it needs to be canceled.

    MDN Reference

    Returns void

  • Invoking this method prevents event from reaching any registered event listeners after the current one finishes running and, when dispatched in a tree, also prevents event from reaching any other objects.

    MDN Reference

    Returns void

  • When dispatched in a tree, invoking this method prevents event from reaching any objects other than the current object.

    MDN Reference

    Returns void