W3cubDocs

/Web APIs

MediaKeyMessageEvent

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨March 2019⁩.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The MediaKeyMessageEvent interface of the Encrypted Media Extensions API contains the content and related data when the content decryption module generates a message for the session.

Constructor

MediaKeyMessageEvent(): Creates a new instance of MediaKeyMessageEvent.

Instance properties

Inherits properties from its parent, Event.

MediaKeyMessageEvent.message Read only: Returns an ArrayBuffer with a message from the content decryption module. Messages vary by key system.
MediaKeyMessageEvent.messageType Read only: Indicates the type of message. May be one of license-request, license-renewal, license-release, or individualization-request.

Instance methods

Inherits methods from its parent, Event.

Examples

// TBD

Specifications

Specification
Encrypted Media Extensions> # mediakeymessageevent>

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`MediaKeyMessageEvent`	42	13	38	29	12.1	42	38	29	12.2	4.0	42	12.2
`MediaKeyMessageEvent`	42	13	38	29	12.1	42	38	29	12.2	4.0	42	12.2
`message`	42	13	38	29	12.1	42	38	29	12.2	4.0	42	12.2
`messageType`	42	13	38	29	12.1	42	38	29	12.2	4.0	42	12.2

© 2005–2025 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/MediaKeyMessageEvent