Accessing variables in AngularJS from one function to another function

Question

Accessing variables in AngularJS from one function to another function

I am facing an issue where I need to access a variable in one function from another function. My code structure is as follows:

NOTE: The value for submitData.alcohol is obtained from elsewhere in my code.

angular.module('app',['ui.router'])
 .controller('infoCtrl',['$scope','$http',functioninfoCtrl($scope,$http){
    var result;
    $scope.one = function(){
      if(submitData.alcohol=='1'){
        result = 'Yes';
      }else{
        result = 'No';
       }
    };

    $scope.two = function(){
       console.log(result);
    }
}]);

However, when I check the log, I see that the result is 'undefined'. How can I resolve this issue?

javascript angularjs

Answer 1

Answer №1

There may be a few reasons why this is happening:

Your $scope.one function could be asynchronous, causing the console.log(result) to print undefined before $scope.one completes.

It's possible that your function $scope.one is never called.

var result = "";    
$scope.one = function() {    
    if (submitData.alcohol == '1') {    
        result = 'Yes';
    } else {
        result = 'No';
    }        
};

$scope.two = function() {    
    $scope.one();
    console.log(result);    
}

Solution: Use Promises

Your $scope.one function can be updated like this:

$scope.one = function(param) {
  var deferred = $q.defer();

    YourAPICall(param, function(data) {            
      deferred.resolve(data);
    });    
   return deferred.promise;
};

Your $scope.two function can be updated as follows:

 $scope.two = function(){
     $scope.one(param).then(function (data) {
         console.log("data", data);//check for your condition here                  
     });
 }

Answer 2

There may be a few reasons why this is happening:

Your $scope.one function could be asynchronous, causing the console.log(result) to print undefined before $scope.one completes.

It's possible that your function $scope.one is never called.

var result = "";    
$scope.one = function() {    
    if (submitData.alcohol == '1') {    
        result = 'Yes';
    } else {
        result = 'No';
    }        
};

$scope.two = function() {    
    $scope.one();
    console.log(result);    
}

Solution: Use Promises

Your $scope.one function can be updated like this:

$scope.one = function(param) {
  var deferred = $q.defer();

    YourAPICall(param, function(data) {            
      deferred.resolve(data);
    });    
   return deferred.promise;
};

Your $scope.two function can be updated as follows:

 $scope.two = function(){
     $scope.one(param).then(function (data) {
         console.log("data", data);//check for your condition here                  
     });
 }

Answer 3

Answer №2

To ensure proper functionality, make sure to link the variable to the scope:

var $scope.output = '';

When referencing it within the if statement, use this format:

if(formData.selection=='1') {
    $scope.output = 'Approved';
} else {
    $scope.output = 'Rejected';
}

Additionally, include a console.log for debugging purposes:

console.log($scope.output);

Answer 4

To ensure proper functionality, make sure to link the variable to the scope:

var $scope.output = '';

When referencing it within the if statement, use this format:

if(formData.selection=='1') {
    $scope.output = 'Approved';
} else {
    $scope.output = 'Rejected';
}

Additionally, include a console.log for debugging purposes:

console.log($scope.output);

Answer 5

Answer №3

Change 'result' to '$scope.result'

if (submitData.alcohol == '1') {

     $scope.result = 'Yes';
} else {

     $scope.result = 'No';
}

Another important point to note is ensuring that problem one is completed before the result is returned. It would be helpful if you can share your entire code for further analysis. Alternatively, you can provide a demonstration in plunker or jsfiddle.

Answer 6

Change 'result' to '$scope.result'

if (submitData.alcohol == '1') {

     $scope.result = 'Yes';
} else {

     $scope.result = 'No';
}

Another important point to note is ensuring that problem one is completed before the result is returned. It would be helpful if you can share your entire code for further analysis. Alternatively, you can provide a demonstration in plunker or jsfiddle.

Accessing variables in AngularJS from one function to another function

Answer №1

Answer №2

Answer №3

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