w3c/push-api — pull request #7 by mvano (2014-07-29 16:40:33+00:00)
Title: Data attribute is nullable DOMString

The data attribute of the push message is a nullable DOMString, not a JSON object.

As discussed in public-webapps:
http://lists.w3.org/Archives/Public/public-webapps/2014AprJun/0223.html