jquery - Getting error while detect chrome extension installed or not using javascript -

here code,

var myextension = chrome.management.get( "my_extention_id" ); if (myextension.enabled) { // installed } else { ... }

source : http://developer.chrome.com/extensions/management.html#method-get have tried method. i'm getting following error: uncaught typeerror: cannot read property 'get' of undefined

if it's undefined you're missing management declaration in manifest:

"permissions": [           "management"         ],

GCM