Is it possible to pass a scope into a function in Angular by treating it as a variable being passed?

Having trouble passing a scope into a function and getting it to work properly. Here's the code snippet -

ng-click="clickFunction(scope1)"

//the function 
$scope.clickFunction = function(passedScope){
    
      passedScope = false;
      console.log($scope.scope1);

Basically, I want to pass the scope and set it to false on click. However, when I log the scope after changing it, it still shows as true. I also attempted -

  $scope.passedScope

The goal is to change $scope.scope1 to false. It is initially set as true at the top of the controller and controls a nearby button with ng-disabled="!scope1". Simply toggling scope1 on click doesn't work because there's a confirmation modal involved which sets the passed scope to false. Instead of directly calling the scope, I'm trying to create a reusable function that can update different scopes by passing them as arguments.

I thought passing the scope through the function would work.

Thanks!

Update: Thanks to @Josep's guidance today, I managed to find a workaround by passing the scope as a string like this

   ng-click="clickFunction('scope1')"

And then using

$scope[passedScope] = false;

Answer №1

To transfer the current scope of a section in your view to a function, you can achieve it using the following method:

ng-click="clickHandler(this)"

Within your function, ensure that you handle the scope like this:

$scope.clickHandler = function(currentScope){
   currentScope.someScopeProperty = true;//<---Note the difference from the suggested code.

You cannot assign scope directly to false; instead, you should modify one of its properties to control its behavior. This is because a scope represents an object containing various properties, events, and methods inherited from its ancestors up to $rootScope, as well as custom ones.

If your intention is to manipulate a property of the scope by passing it as an argument to a function, allowing modifications within that function, remember that in JavaScript, parameters are passed by value unless it's an object where updating its properties will reflect changes. Passing a boolean property only transmits its value, not the reference itself. For more insights on this, refer to: Pass Variables by Reference in Javascript.

Answer №2

Instead of following Josep's suggestion (which provided valuable insight), you can simplify your code by doing the following:

ng-click="clickFunction()"

Then, in your function, you can access the current scope using this:

$scope.clickFunction = function() {
   this.somePropertyOfTheScope = false;

   //...
}

This approach is particularly handy when working with ng-include, which creates a new scope and places clickFunction at the parent scope level.

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