MessageEvent

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:1347

A message received by a target object.

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Extends

Event

Constructors

Constructor

new MessageEvent(type, initializer): MessageEvent

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:1348

Parameters

type

string

initializer

MessageEventInit

Returns

MessageEvent

Overrides

Event.constructor

Properties

bubbles

readonly bubbles: boolean

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:685

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.

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Inherited from

Event.bubbles

cancelable

readonly cancelable: boolean

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:691

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.

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Inherited from

Event.cancelable

cancelBubble

cancelBubble: boolean

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:739

Inherited from

Event.cancelBubble

composed

readonly composed: boolean

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:679

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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Inherited from

Event.composed

currentTarget?

readonly optional currentTarget: EventTarget<Record<string, Event>>

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:709

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

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Inherited from

Event.currentTarget

data

readonly data: any

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:1354

Returns the data of the message.

MDN Reference

defaultPrevented

readonly defaultPrevented: boolean

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:697

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

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Inherited from

Event.defaultPrevented

eventPhase

readonly eventPhase: number

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:673

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

MDN Reference

Inherited from

Event.eventPhase

isTrusted

readonly isTrusted: boolean

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:733

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

MDN Reference

Inherited from

Event.isTrusted

lastEventId

readonly lastEventId: string

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:1366

Returns the last event ID string, for server-sent events.

MDN Reference

origin

readonly origin: null | string

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:1360

Returns the origin of the message, for server-sent events and cross-document messaging.

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ports

readonly ports: MessagePort[]

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:1378

Returns the MessagePort array sent with the message, for cross-document messaging and channel messaging.

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returnValue

readonly returnValue: boolean

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:703

Inherited from

Event.returnValue

source

readonly source: null | MessagePort

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:1372

Returns the WindowProxy of the source window, for cross-document messaging, and the MessagePort being attached, in the connect event fired at SharedWorkerGlobalScope objects.

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srcElement

readonly srcElement: null | EventTarget<Record<string, Event>>

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:721

Inherited from

Event.srcElement

target?

readonly optional target: EventTarget<Record<string, Event>>

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:715

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

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Inherited from

Event.target

timeStamp

readonly timeStamp: number

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:727

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

MDN Reference

Inherited from

Event.timeStamp

type

readonly type: string

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:667

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

MDN Reference

Inherited from

Event.type

AT_TARGET

readonly static AT_TARGET: number

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:766

Inherited from

Event.AT_TARGET

BUBBLING_PHASE

readonly static BUBBLING_PHASE: number

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:767

Inherited from

Event.BUBBLING_PHASE

CAPTURING_PHASE

readonly static CAPTURING_PHASE: number

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:765

Inherited from

Event.CAPTURING_PHASE

NONE

readonly static NONE: number

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:764

Inherited from

Event.NONE

Methods

composedPath()

composedPath(): EventTarget<Record<string, Event>>[]

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:763

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<Record<string, Event>>[]

Inherited from

Event.composedPath

preventDefault()

preventDefault(): void

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:751

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.

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Returns

void

Inherited from

Event.preventDefault

stopImmediatePropagation()

stopImmediatePropagation(): void

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:745

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

Inherited from

Event.stopImmediatePropagation

stopPropagation()

stopPropagation(): void

Defined in: node_modules/.pnpm/@cloudflare+workers-types@4.20250923.0/node_modules/@cloudflare/workers-types/index.ts:757

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

MDN Reference

Returns

void

Inherited from

Event.stopPropagation