What is the best way to break out of a function halfway through?

What are your thoughts on using nested if statements?

$scope.addToCart = function () {
    if (flagA) {
        if (flagB) {
            if (flagC) {
                alert('nononono!');
                return;
            }
        }
    }
    executeAnotherFunction();
};

I'm working with the following function:

$scope.addToCart = function () {
    var foo = 5;
    if (someFlag == 'Y') {
        alert('warning!');
        return;
    }
    executeAnotherFunction();
};

I call this function somewhere in my code

ng-click = "addToCart()"

My goal is to exit the function if

someFlag == 'Y'

and avoid executing

executeAnotherFunction();

However, it seems that the function still executes it.

According to WebStorm, it suggests that the return statement is unnecessary and could be safely removed.

Answer №1

If you are confident that the if statement is true, but the return function isn't working, you can also test placing someAnotherFunction(); inside the else block:

if (someFlag == 'Y') {
    alert('warning!');
    return;
}
else {
    someAnotherFunction();
}

This way, someAnotherFunction() will only be executed if the condition in the if statement is false.

Note

The original code should function properly and this is just a temporary solution, as mentioned in the comment. Nevertheless, both approaches achieve the same objective in theory.

For more information, refer to this question - for further insight into the distinctions.

Answer №2

To include the invocation of the different function, consider placing it within the else statement:

$scope.addToCart = function () {
    var foo = 5;
    if (someFlag == 'Y') {
        alert('warning!');
        return;
    } else {
      invokeDifferentFunction();
    }

};

This adjustment will help clarify the situation for you.

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