Could someone clarify the distinction between declaring these two functions in an angular controller?
function demo() {
};
scope.demo = function() {
};
Are these two functions similar in performance, or is one option better than the other?
I am aware of one difference: a watch can be applied to a function that is in scope, which means an angular directive or element cannot call a JavaScript function directly.
Take a look at this example controller:
app.controller('Home', function($scope){
function secretFunction(){
alert('Hello world');
}
$scope.publicFunction(){
alert("I'm visible!");
}
secretFunction(); // will display an alert every time HomeController is created
});
when used in the view:
<div ng-controller="Home">
<button ng-click="secretFunction()">This won't work</button>
<button ng-click="publicFunction()">This will trigger an alert</button>
</div>
Notice how the private method can only be accessed within the controller itself.
In my opinion, the key distinction lies in the accessibility of the function. The initial one will have a global scope, while the second can only be accessed through an angular scope variable.
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