W3cubDocs

/Web APIs

HTMLMediaElement: encrypted event

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.

The encrypted event is fired when initialization data is found in the media that indicates it is encrypted.

This event is not cancelable and does not bubble.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("encrypted", (event) => { })

onencrypted = (event) => { }

Event type

A MediaEncryptedEvent. Inherits from Event.

Event MediaEncryptedEvent

Event properties

MediaEncryptedEvent.initDataType Read only

Returns a case-sensitive string with the type of the format of the initialization data found.

MediaEncryptedEvent.initData Read only

Returns an ArrayBuffer containing the initialization data found. If there is no initialization data associated with the format, it returns null.

Specifications

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
encrypted_event 42 13 38 29 12.1 42 38 29 12.2 4.0 42 12.2

See also

© 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/HTMLMediaElement/encrypted_event