Unable to update angular $scope using ng-click

I am attempting to modify a directive controller's $scope using ng-click.

There is a simple button in my code:

<button ng-click="showEnterKeyField = !showEnterKeyField">btn {{showEnterKeyField}}</button>

This code functions as expected, displaying (in the button text):

btn true
btn false
btn true
... and so on

However, in the controller we have:

$scope.$watch('showEnterKeyField', function(val) {
    console.log(val);
}, true);

Yet, no logs appear in the console when this runs.

Next, I tried running a test() function within the ng-click:

<button ng-click="test()">btn {{showEnterKeyField}}</button>

To my surprise, this code behaves the same as the previous one:

btn true
btn false
btn true
... and so on

This time, however, I do see records in the console.

Why is the scope not changing in the first scenario? Thank you.

UPDATE

Here is the implementation of $scope.test():

$scope.test = function() {
    $scope.showEnterKeyField = !$scope.showEnterKeyField;
};

Answer №1

To ensure that the attribute (such as showEnterKeyField) is available on your controller's scope, you must define it first. This way, the ngClick directive can inherit it properly. If the attribute is not defined, the ngClick directive will create it on its own child scope, making it inaccessible from within your controller's (parent) scope.

To fix this issue, simply add the following code to your controller:

$scope.showEnterKeyField = false; // or assign another initial value

For more information, check out: JS Bin

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