Navigating to the most recent item within ng-repeat (AngularJS or JavaScript)

Question

Navigating to the most recent item within ng-repeat (AngularJS or JavaScript)

I am working on a feature where posts are displayed using ng-repeat in a div, and users can enter new posts in an input box. The posts are sorted so that the latest one appears at the bottom. After adding a new post, I want to automatically scroll down to see it. Is there a smart way to achieve this with Angular, or do I have to resort to using JavaScript?

<div ng-repeat="post in posts | limitTo:-15">
    {{post.uid}} : {{post.text}}
</div>

<form>
  <input type="textarea" class="chatbox" placeholder="Start typing..." ng-model="newPost"/>
  <button class="chatbutton" type="submit" ng-click="addPost(newPost); newPost = null; setInterval();"><span class="glyphicon glyphicon-send"></span></button>
</form>

javascript jquery html css angularjs

Answer 1

Answer №1

To make this more versatile, consider implementing a decorating directive.

Check out this example that may guide you in the right direction;

Essentially, when a new item is added, the $anchorScroll service will automatically scroll to that specific element.

http://jsbin.com/lofizagiba/27/edit

Answer 2

To make this more versatile, consider implementing a decorating directive.

Check out this example that may guide you in the right direction;

Essentially, when a new item is added, the $anchorScroll service will automatically scroll to that specific element.

http://jsbin.com/lofizagiba/27/edit

Answer 3

Answer №2

It seems like you could achieve this with JavaScript. Depending on how your code is set up, you can catch the submit process and then scroll down to the most recent post. Without knowing the specifics of your submit function, it's difficult to provide exact instructions. However, a possible approach could be:

You can handle the submit action in your code and upon clicking, scroll to the bottom using code similar to the following:

 $("#submit").on("click" ,function(){
            scrolled=scrolled + 2700;
            /* other functions here */
            $(".stuff").animate({
                    scrollTop:  scrolled
               });

 });

Answer 4

It seems like you could achieve this with JavaScript. Depending on how your code is set up, you can catch the submit process and then scroll down to the most recent post. Without knowing the specifics of your submit function, it's difficult to provide exact instructions. However, a possible approach could be:

You can handle the submit action in your code and upon clicking, scroll to the bottom using code similar to the following:

 $("#submit").on("click" ,function(){
            scrolled=scrolled + 2700;
            /* other functions here */
            $(".stuff").animate({
                    scrollTop:  scrolled
               });

 });

Answer 5

Answer №3

After some research and assistance from PSL, I managed to solve the issue using anchorScroll. Here is the updated code snippet:

<div id="scrollArea" ng-controller="ScrollController">

  <div style="padding: 10px" ng-repeat="post in posts | limitTo:-10">
    <span class="chatbox" style="background: {{post.pcolor}}">{{post.text}}</span>&nbsp;&nbsp;<span class="chatname">{{post.pname}} ({{post.time}})</span>
  </div>

<form>
  <input  class="chatinput" placeholder="Start typing..." ng-model="newPost"/>
  <button class="chatbutton" type="submit" ng-click="gotoBottom(); addPost(newPost); newPost = null;"><span class="glyphicon glyphicon-send"></span></button>
</form>
<a id="bottom"></a>
</div>

To ensure proper functionality, remember to place the id="bottom" tag within the div of the ScrollController:

.controller('ScrollController', ['$scope', '$location', '$anchorScroll',
  function ($scope, $location, $anchorScroll) {
    $scope.gotoBottom = function() {
      // set the location.hash to the id of
      // the element you wish to scroll to.
      $location.hash('bottom');

      // call $anchorScroll()
      $anchorScroll();
    };
  }])

Answer 6

After some research and assistance from PSL, I managed to solve the issue using anchorScroll. Here is the updated code snippet:

<div id="scrollArea" ng-controller="ScrollController">

  <div style="padding: 10px" ng-repeat="post in posts | limitTo:-10">
    <span class="chatbox" style="background: {{post.pcolor}}">{{post.text}}</span>&nbsp;&nbsp;<span class="chatname">{{post.pname}} ({{post.time}})</span>
  </div>

<form>
  <input  class="chatinput" placeholder="Start typing..." ng-model="newPost"/>
  <button class="chatbutton" type="submit" ng-click="gotoBottom(); addPost(newPost); newPost = null;"><span class="glyphicon glyphicon-send"></span></button>
</form>
<a id="bottom"></a>
</div>

To ensure proper functionality, remember to place the id="bottom" tag within the div of the ScrollController:

.controller('ScrollController', ['$scope', '$location', '$anchorScroll',
  function ($scope, $location, $anchorScroll) {
    $scope.gotoBottom = function() {
      // set the location.hash to the id of
      // the element you wish to scroll to.
      $location.hash('bottom');

      // call $anchorScroll()
      $anchorScroll();
    };
  }])

Navigating to the most recent item within ng-repeat (AngularJS or JavaScript)

Answer №1

Answer №2

Answer №3

Similar questions

Enhancing functionality with extra JavaScript tags in next.js

Deleting an element from a reference array in Mongoose

Learn how to render list items individually in Vue.js using the 'track-by $index' directive

Sending an Array from a ReactJS Frontend to a Django Backend using JavaScript and Python

Creating a series of text messages for Push Notifications using FCM in conjunction with Ionic 1. Multiple lines of

Transform the Data into JSON format

Ensure that a group of checkboxes is mandatory

What could be the reason that the style tag present in this SVG is not impacting any of the elements?

Creating a mouse-resistant div with a magnet-like effect

Utilizing Express.js: Passing the req Object to Middleware without the Need for a New Multer Route

Display various child components in a React application depending on the current state

Hide the paragraph element when the navigation link is being hovered over

An intriguing inquiry regarding HTML form intricacies

Tips for updating the color of buttons after they have been selected, along with a question regarding input

Retrieve HTML classes within JavaScript textual templates

Saving data from the Viewbag into a jQuery array or object on the client side

I'm having some trouble with this search filter in Vue 2 - is it failing to display the items as expected

Drawing mysteriously disappeared from the canvas

Exploring the world of command line testing with Angular2, Typescript, Karma, and Jasmine

What steps can I take to ensure the proper formatting of the `select` input on Mac OS?