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This API is available on Firefox OS for internal applications only.


The delivery property represents a possible value to match the messages' delivery property to filter them out.


var delivery = = stringValue;


A string or null.

If the value is set as a string, the possible values must be one of sent or received.


This is a non-standard implementation, but it is discussed at W3C as part of the System Application Working Group.

Specification Status Comment
Messaging API Editor's Draft Editor Draft (WIP).

Browser compatibility

For obvious reasons, support is primarily expected on mobile browsers.

Supported in Firefox OS 1.0.1.

See also