Is there a way to activate ng-change when a space character is input?

Question

Is there a way to activate ng-change when a space character is input?

My function is triggered when the value of a textarea changes, however, it does not work when the spacebar is pressed. Is there a way to make it work for spacebars as well? I want the function to be called whenever the content changes, regardless of the key pressed.

I have included a link to a fiddle with the code. In the example, you can see that the $scope.log array does not add a new element when the spacebar (or enter key) is pressed, but it does with any other key that is not whitespace.

Check out the sample fiddle here: http://jsfiddle.net/UJWLN/4/

javascript angularjs

Answer 1

Answer №1

If you want to prevent trimming in your input field, you can utilize the ng-trim directive and set it to false. Here's an example:

<input ng-change="changeFunction()" ng-model="myModel" ng-trim="false"></input>

However, this solution may not be suitable for all scenarios. If you require an action to be triggered on each keystroke, consider using a custom directive. Below is a custom directive I created for you:

http://jsfiddle.net/UJWLN/6/

myApp.directive('ngKeystroke', function(){
    return {
        restrict: 'A',
        link: function(scope, elem, attrs){
            elem.bind("keyup", function(){
                scope.log.push('called');
                scope.$digest(); 
            });
        }
    };
});

Answer 2

If you want to prevent trimming in your input field, you can utilize the ng-trim directive and set it to false. Here's an example:

<input ng-change="changeFunction()" ng-model="myModel" ng-trim="false"></input>

However, this solution may not be suitable for all scenarios. If you require an action to be triggered on each keystroke, consider using a custom directive. Below is a custom directive I created for you:

http://jsfiddle.net/UJWLN/6/

myApp.directive('ngKeystroke', function(){
    return {
        restrict: 'A',
        link: function(scope, elem, attrs){
            elem.bind("keyup", function(){
                scope.log.push('called');
                scope.$digest(); 
            });
        }
    };
});

Answer 3

Answer №2

In order to activate the ng-change event when pressing the space bar, I implemented the ng-trim functionality. This solution is functioning perfectly.

<textarea ng-model="myApp.text" name="text" ng-trim="true" rows="4" cols="10" maxlength="200"></textarea>

Answer 4

In order to activate the ng-change event when pressing the space bar, I implemented the ng-trim functionality. This solution is functioning perfectly.

<textarea ng-model="myApp.text" name="text" ng-trim="true" rows="4" cols="10" maxlength="200"></textarea>

Answer 5

Answer №3

If you're looking for a solution, check out this jsfiddle example

`html`

<div ng-controller="MyCtrl">
    <textarea key-listener="changeFunction()" ng-model="myModel"></textarea>
    <div>{{log}}</div>
</div>

`javascript`

var myApp = angular.module('myApp',[]);

function MyCtrl($scope) {
    $scope.log=[];
    $scope.changeFunction=function(){
        $scope.log.push('Called');
    }
}

myApp.directive('keyListener', function() {
    return function(scope, elm, attrs) {
        elm.bind("keyup", function(event) {
            scope.$apply(attrs.keyListener);
        });
    };
})

Answer 6

If you're looking for a solution, check out this jsfiddle example

`html`

<div ng-controller="MyCtrl">
    <textarea key-listener="changeFunction()" ng-model="myModel"></textarea>
    <div>{{log}}</div>
</div>

`javascript`

var myApp = angular.module('myApp',[]);

function MyCtrl($scope) {
    $scope.log=[];
    $scope.changeFunction=function(){
        $scope.log.push('Called');
    }
}

myApp.directive('keyListener', function() {
    return function(scope, elm, attrs) {
        elm.bind("keyup", function(event) {
            scope.$apply(attrs.keyListener);
        });
    };
})

Answer 7

Answer №4

In case someone revisits this post.

I recently came across this information in the AngularJS documentation: https://docs.angularjs.org/api/ng/input/input%5Btext%5D ngTrim (optional)

boolean

When ngTrim is set to false, Angular will not automatically trim the input. It's important to note that this setting does not apply to input[type=password] fields, as they will not be trimmed by Angular.

Answer 8

In case someone revisits this post.

I recently came across this information in the AngularJS documentation: https://docs.angularjs.org/api/ng/input/input%5Btext%5D ngTrim (optional)

boolean

When ngTrim is set to false, Angular will not automatically trim the input. It's important to note that this setting does not apply to input[type=password] fields, as they will not be trimmed by Angular.

Answer 9

Answer №5

After experimenting, I found that the code below worked for me:

HTML:

<input type="text" ng-model="typedEmail" ng-keyup="($event.keyCode == 32) ? validateEmail(typedEmail) : ''">

Controller:

$scope.validateEmail = function(emailId){
 //Your custom validation code here
};

Event code 32: corresponds to the Spacebar key event code

Similarly,
Event code 13: corresponds to the Enter key event code
Event code 16: corresponds to the Shift key event code
Event code 17: corresponds to the Control key event code
Event code 18: corresponds to the Alt key event code

Check out the ng-key documentation for more details and try out different keyCode values as shown in the examples in the AngularJS documentation.

Answer 10

After experimenting, I found that the code below worked for me:

HTML:

<input type="text" ng-model="typedEmail" ng-keyup="($event.keyCode == 32) ? validateEmail(typedEmail) : ''">

Controller:

$scope.validateEmail = function(emailId){
 //Your custom validation code here
};

Event code 32: corresponds to the Spacebar key event code

Similarly,
Event code 13: corresponds to the Enter key event code
Event code 16: corresponds to the Shift key event code
Event code 17: corresponds to the Control key event code
Event code 18: corresponds to the Alt key event code

Check out the ng-key documentation for more details and try out different keyCode values as shown in the examples in the AngularJS documentation.

Is there a way to activate ng-change when a space character is input?

Answer №1

Answer №2

Answer №3

`html`

`javascript`

Answer №4

Answer №5

Similar questions

Creating a Website that Adapts to Different Browser Sizes: Tips and Tricks

Encountered an error with rootscope:infdig when utilizing ng repeat loop

Retrieve the image by its unique identifier while viewing a preview of the image before it is uploaded

Issue with Ajax reload functions malfunctioning

Changing text color based on positive or negative value in JavaScript(React)

Retrieving information from a distant JSONP Entity

Sending a multitude of variables using strings, evaluating them through various functions, and incorporating a variety of methods

Objects remaining static

A guide to querying JSON data in a backend database with JavaScript

Utilizing ng-repeat to loop through a div element that consists of various nested tags

Material-UI: Issues with functionality arising post library update

Exploring the crossroads of MongoDB, Mongoose, and Node.js: An in-depth look

Tips for running and testing an AngularJS project within IntellijIDEA?

Content that moves with a flick of a finger

Error on AngularJS: Module 'ngExcel' is unavailable

Javascript tree structures that enable the drag-and-drop of multiple items

Challenges with Hangman in JavaScript

Prevent the ability to drag and drop within specific div elements

Trouble Logging In: User Login Issue with SailsJS and PassportJS Plugin (sails-generate-auth)

How can I apply and delete a css class only while scrolling in a React application?