Document.mozSyntheticDocument

Indicates whether or not the document is a synthetic one; that is, a document representing a standalone image, video, audio, or the like.

Syntax

var isSynthetic = document.mozSyntheticDocument;

On return, isSynthetic is true if the document is a synthetic one; otherwise it's false.

Example

This can be useful if you have a contextual menu item you only want to display for synthetic documents (or, conversely, for documents that aren't synthetic).

var isSynthetic = document.mozSyntheticDocument;

if (isSynthetic) {
  /* insert your menu item here */
}

Specifications

Not part of any specification.

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/document/mozsyntheticdocument