Changing the direction of scrolling in AngularJS

Question

Changing the direction of scrolling in AngularJS

I'm currently working on an Ionic / Angular application and I've come across a situation where I need to change the scroll direction when scrolling. Usually, when you scroll down, the content moves down as well. However, I want to achieve the opposite - making the content move up when scrolling down and vice versa.

Is there a way to reverse the scroll direction?

Here is the code snippet I am using:

<!-- home page -->
 <script type="text/ng-template" id=“home.html">
    <ion-view ng-controller=“HomeController" title=“Home page">
        <ion-content>
            <ion-list>
                <ion-item ng-repeat="message in messages track by $index">
                    {{message}}
                </ion-item>
            <ion-list>
        </ion-content>
    </ion-view>
  </script>

javascript angularjs scroll ionic-framework

Answer 1

Answer №1

Achieving this is certainly doable. Take a look at the jsFiddle provided here.

Below is the HTML structure:

<div ng-app="scrollApp">
    <scrollbox> <!-- custom directive -->
        Content that needs to be scrolled
    </scrollbox>
</div>

The JavaScript implementation is as follows:

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

app.directive('scrollbox', function($window) {

    angular.element($window).bind('mousewheel', function(event) {        

        event.preventDefault(); // Prevent the default scroll behavior

        var currentPosition = $window.pageYOffset;
        var delta = event.wheelDelta;                         
        window.scrollTo(0, currentPosition + delta);
    }); 

    return {};
});

Answer 2

Achieving this is certainly doable. Take a look at the jsFiddle provided here.

Below is the HTML structure:

<div ng-app="scrollApp">
    <scrollbox> <!-- custom directive -->
        Content that needs to be scrolled
    </scrollbox>
</div>

The JavaScript implementation is as follows:

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

app.directive('scrollbox', function($window) {

    angular.element($window).bind('mousewheel', function(event) {        

        event.preventDefault(); // Prevent the default scroll behavior

        var currentPosition = $window.pageYOffset;
        var delta = event.wheelDelta;                         
        window.scrollTo(0, currentPosition + delta);
    }); 

    return {};
});

Changing the direction of scrolling in AngularJS

Answer №1

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