Automatically scroll to the end of the data retrieved through ajax

Question

Automatically scroll to the end of the data retrieved through ajax

I am currently developing a live chat website for my users and I am using ajax to fetch the chat messages. However, I am facing an issue where whenever I enter a new message, it does get added to the database and displayed, but the scroll doesn't automatically go to the bottom of the results.

For example, when I input a new message, the scroll fails to reach the bottom.

https://i.sstatic.net/29hYk.jpg

If I manually scroll, then all the messages become visible.

https://i.sstatic.net/qgdg7.jpg

Here is the HTML div where the data is fetched via ajax:

<div id="chat">

</div>

I have tried using this code snippet to resolve the issue, however, it did not work as expected:

window.setInterval(function(){
  var elem = document.getElementById('chat');
  elem.scrollTop = elem.scrollHeight;
}, 1000);

I would appreciate any suggestions on the best approach to achieve the desired result.

javascript jquery css ajax

Answer 1

Answer №1

I went above and beyond the requirements, but here is my response. Please take note that I omitted the AJAX function and instead utilized the initial message as a template, replicating it to simulate new messages from AJAX. To integrate your AJAX function, replace $('#msg-template').clone()... with it, and ensure that the completion function following AJAX includes: if(autoScroll){ ScrollChat(); }.

The accompanying fiddle includes comments along with some HTML and CSS examples: http://jsfiddle.net/mmwu1920/

var autoScroll = true;

function ScrollChat(){
    $('#chat').scrollTop($('#chat')[0].scrollHeight).trigger('scroll');
}

function RefreshMessages(){
    $('#msg-template').clone().appendTo('#chat');
    if(autoScroll){ ScrollChat(); }
}
setInterval(RefreshMessages, 1000);

ScrollChat();

$('#chat').on('scroll', function(){
    if($(this).scrollTop() < this.scrollHeight - $(this).height()){
        autoScroll = false;
    }
    else{
        autoScroll = true;
    }
});

Answer 2

I went above and beyond the requirements, but here is my response. Please take note that I omitted the AJAX function and instead utilized the initial message as a template, replicating it to simulate new messages from AJAX. To integrate your AJAX function, replace $('#msg-template').clone()... with it, and ensure that the completion function following AJAX includes: if(autoScroll){ ScrollChat(); }.

The accompanying fiddle includes comments along with some HTML and CSS examples: http://jsfiddle.net/mmwu1920/

var autoScroll = true;

function ScrollChat(){
    $('#chat').scrollTop($('#chat')[0].scrollHeight).trigger('scroll');
}

function RefreshMessages(){
    $('#msg-template').clone().appendTo('#chat');
    if(autoScroll){ ScrollChat(); }
}
setInterval(RefreshMessages, 1000);

ScrollChat();

$('#chat').on('scroll', function(){
    if($(this).scrollTop() < this.scrollHeight - $(this).height()){
        autoScroll = false;
    }
    else{
        autoScroll = true;
    }
});

Answer 3

Answer №2

To adjust the scroll position of the main element (or the element containing the scrollbar):

<div id="wrapper">

  <div id="content">

  </div>

</div>

-

window.setInterval(function(){
  var box = document.getElementById('wrapper');
  box.scrollTop = box.scrollHeight;
}, 1000);

Answer 4

To adjust the scroll position of the main element (or the element containing the scrollbar):

<div id="wrapper">

  <div id="content">

  </div>

</div>

-

window.setInterval(function(){
  var box = document.getElementById('wrapper');
  box.scrollTop = box.scrollHeight;
}, 1000);

Automatically scroll to the end of the data retrieved through ajax

Answer №1

Answer №2

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