Angular JS function use $scope or not

Question

According to the Angular docs:

Scope is the glue between application controller and the view. During the template linking phase the directives set up $watch expressions on the scope. The $watch allows the directives to be notified of property changes, which allows the directive to render the updated value to the DOM.

Now my Question is : if my function is not connected to the view, should we use $scope or not?

I think you shouldn't. It will improve your app performance, because function not connected to scope will not be checked in each digest cycle. — akn
– akn, Commented Nov 6, 2014 at 7:57

Niclas Schumacher · Accepted Answer · 2014-11-06 08:10:38Z

2

I assume that you mean if you should do $scope.functionName = function(), even if the function isn't connected to the view.

No you shouldn't, why would you expose a function to the view, which isn't needed to the view? Also you get a better overview which functions is internally when only using function funcName().

answered Nov 6, 2014 at 8:10

Niclas Schumacher

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2 Comments

amrit_neo Over a year ago

correct, that is what I thought, but not using $scope, can make that function global. and it would be accessible from any where. right?

Niclas Schumacher Over a year ago

I dont think so. It is still in the context of the controller.

tomaoq · Accepted Answer · 2014-11-06 08:30:54Z

1

You shouldn't use the $scope to declare every function you are using, especially if it's not connected to the view.

However, there are some cases you need to use the $scope in a function not connected to view, for example if you want to emit/receive/broadcast a message on the scope tree or access something on a parent scope (although it's not necessarly a good practice).

answered Nov 6, 2014 at 8:30

tomaoq

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1 Comment

Krzysztof Safjanowski Over a year ago

If you want to emit/receive/brodcast you can use service and pass $scope as argument to some method from that service.

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