access $scope from $rootscope angularjs

Question

I would like to know if there is a way to access the $scopes variables using the $rootScope such that if a function is defined in scope I can invoke it using $rootscope to or if there is a variable defined using $scope.var1 I could access it using $rootScope to

$scope is child of $rootScope simply they maintain inheritance relation between them..and you know parent can not have access to its child...as child can access its parent info..because its generalize.. — Pankaj Parkar
– Pankaj Parkar, Commented Sep 9, 2015 at 16:12
@PankajParkar Actually parent has access to its child scope. So it is possible, however not very useful. — dfsq
– dfsq, Commented Sep 9, 2015 at 16:14
"Sure, I can show you how to drive your car off the road real fast & nice!" — Mikko Viitala
– Mikko Viitala, Commented Sep 9, 2015 at 16:23
There's no reason for $rootScope to access his childscopes. You should really try to avoid this. — Leo
– Leo, Commented Sep 9, 2015 at 16:25

dfsq · Accepted Answer · 2015-09-09 16:24:15Z

5

Every scope have a two property references to its child scopes, namely: $$childHead and $$childTail. Additionally every scope object has $$nextSibling and $$prevSibling properties pointing to same-level scope sibling instances. Having this properties you can travers all child scopes horizontally or vertically. Depending why you need to do it on each step you would check for necessary scope property or method.

That being said, I can't see real business-logic application for such child scope traversal, except for logging/debugging purposes, for example to build scope hierarchy tree, etc.

answered Sep 9, 2015 at 16:24

dfsq

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3 Comments

Gardezi Over a year ago

I have tried to access the child scope but I'm not able to that

Gardezi Over a year ago

I did it like this $rootScope.$$childHead but I get null in return

mbokil Over a year ago

If you are confused do a console.log($rootScope) and look in the developer console. Find the $$childHead and $$nextSibling nodes and look through them.

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