Utilize AngularJS to bind to the input field's "enter" key and automatically submit the form if the input

Question

Utilize AngularJS to bind to the input field's "enter" key and automatically submit the form if the input

I have been tasked with creating a directive that allows users to navigate to the next input or button in a modal window:

.directive('autoVrm', function () {
    return function (scope, element, attrs) {
                var counter = 0;
            element.bind("keydown keypress", function (event) {
                console.log(element);           
                if(event.which === 13) {
                        counter++;
                    event.preventDefault();
                    var elementToFocus = element.find('input')[counter] || element.find('button')[1];
                    console.log(elementToFocus.type);
                    if(angular.isDefined(elementToFocus))
                        elementToFocus.focus();
                    if (elementToFocus.type === 'button'){
                        counter = -1;
                        elementToFocus.bind("keydown keypress", function (eventSubmit) {
                            if(eventSubmit.which === 13) {
                                console.log('submit');
                            }
                        });
                    }
                }
            });
        };

However, I am encountering an issue where clicking enter while on a button results in:

Uncaught TypeError: undefined is not a function

Why does this happen? How can I enable the enter key to submit the form without needing to involve the controller?

javascript angularjs

Answer 1

Answer №1

For resolving the Uncaught TypeError, it is recommended to use angular.element(elementToFocus).bind.

In relation to your recent comment:

If this function is defined in your controller

$scope.registerUser = function() {
    ...
}

You can then invoke it in the directive like so:

elementToFocus.bind("keydown keypress", function (eventSubmit) {
    if(eventSubmit.which === 13) {
        scope.registerUser();
    }
});

One possible approach could be checking the attrs parameter to retrieve the value of 'data-ng-click' and call the corresponding function:

elementToFocus.bind("keydown keypress", function (eventSubmit) {
    if(eventSubmit.which === 13) {
        if (attrs.dataNgClick == "registerUser()" {
            scope.registerUser();
        }
        else if (attrs.dataNgClick == "sign()" {
            scope.sign();
        }
        else if (attrs.dataNgClick == "frgtPassword()" {
            scope.frgtPassword();
        }
    }
});

Answer 2

For resolving the Uncaught TypeError, it is recommended to use angular.element(elementToFocus).bind.

In relation to your recent comment:

If this function is defined in your controller

$scope.registerUser = function() {
    ...
}

You can then invoke it in the directive like so:

elementToFocus.bind("keydown keypress", function (eventSubmit) {
    if(eventSubmit.which === 13) {
        scope.registerUser();
    }
});

One possible approach could be checking the attrs parameter to retrieve the value of 'data-ng-click' and call the corresponding function:

elementToFocus.bind("keydown keypress", function (eventSubmit) {
    if(eventSubmit.which === 13) {
        if (attrs.dataNgClick == "registerUser()" {
            scope.registerUser();
        }
        else if (attrs.dataNgClick == "sign()" {
            scope.sign();
        }
        else if (attrs.dataNgClick == "frgtPassword()" {
            scope.frgtPassword();
        }
    }
});

Answer 3

Answer №2

This concept is well-established in the realm of web technologies. When the ENTER key is pressed within a form, it triggers a submission action. By properly handling the ng-submit event, you can streamline your code and achieve the desired functionality with minimal effort.

angular.module('app', [])
.controller('MyCtrl', function () {
  var vm = this;
  vm.message = "Press ENTER to submit";
  vm.count = 0; 
  this.onSubmit = function () {
    vm.count++;
    vm.message = "Form submitted " + vm.count + " times";
  };
});

<!DOCTYPE html>
<html ng-app="app">

  <head>
    <script data-require="angular.js@*" data-semver="1.4.0-beta.1" src="https://code.angularjs.org/1.4.0-beta.1/angular.js"></script>
    <link rel="stylesheet" href="style.css" />
    <script src="script.js"></script>
  </head>

  <body ng-controller="MyCtrl as ctrl">
    <h1>Greetings from Stack Overflow!</h1>
    <form ng-submit="ctrl.onSubmit()">
      <input type="text" placeholder="Press ENTER"/>
      <input type="text" placeholder="Press ENTER"/>
      <input type="submit" value="Send" />
    </form>
    <div>{{ctrl.message}}</div>
  </body>

</html>

Answer 4

This concept is well-established in the realm of web technologies. When the ENTER key is pressed within a form, it triggers a submission action. By properly handling the ng-submit event, you can streamline your code and achieve the desired functionality with minimal effort.

angular.module('app', [])
.controller('MyCtrl', function () {
  var vm = this;
  vm.message = "Press ENTER to submit";
  vm.count = 0; 
  this.onSubmit = function () {
    vm.count++;
    vm.message = "Form submitted " + vm.count + " times";
  };
});

<!DOCTYPE html>
<html ng-app="app">

  <head>
    <script data-require="angular.js@*" data-semver="1.4.0-beta.1" src="https://code.angularjs.org/1.4.0-beta.1/angular.js"></script>
    <link rel="stylesheet" href="style.css" />
    <script src="script.js"></script>
  </head>

  <body ng-controller="MyCtrl as ctrl">
    <h1>Greetings from Stack Overflow!</h1>
    <form ng-submit="ctrl.onSubmit()">
      <input type="text" placeholder="Press ENTER"/>
      <input type="text" placeholder="Press ENTER"/>
      <input type="submit" value="Send" />
    </form>
    <div>{{ctrl.message}}</div>
  </body>

</html>

Utilize AngularJS to bind to the input field's "enter" key and automatically submit the form if the input

Answer №1

Answer №2

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