This article is in need of a technical review.
This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.
contactID property represents the unique ID of the contact that has been changed.
var id = instanceOfMozContactChangeEvent.contactID
Return a string.
|Contacts Manager API||Working Draft||First Working Draft (unstable)|
|vCard Format Specification||RFC||
|Feature||Chrome||Firefox (Gecko)||Internet Explorer||Opera||Safari|
|basic support||Not supported||Not supported||Not supported||Not supported||Not supported|
|Feature||Android||Chrome for Android||Firefox Mobile (Gecko)||IE Mobile||Opera Mobile||Safari Mobile|
|basic support||Not supported||Not supported||18.0 (non standard)||Not supported||Not supported||Not supported|
As the specification is unstable, the Gecko implementation is completely non-standard.