Enable automatic scrolling for CSS overflow: scroll feature

I am currently developing a chat application where messages are displayed in a background. I have used CSS to add an overflow scrollbar with the line overflow-y: scroll;. Everything is working properly, but I'm wondering if there is a way to automatically scroll to the bottom of the chat window where the newest messages are displayed. This functionality can also be implemented using JavaScript.

Here is an example of my HTML code:

<article id="chat">
    <script src="chat.js"></script>
</article>

Each message will follow this format and will be added to the article dynamically:

"<p class='msg'>" + msg + "</p>"
javascripthtmlcssscrollbaroverflow

Answer №1

Snippet updated:

var targetElm = document.querySelector('.boxChild'),  // selecting scroll target
    button = document.querySelector('#scrollBtn');        // finding the scroll trigger button
  
// adding event listener to the button 
button.addEventListener('click', function(){
   targetElm.scrollIntoView(); // scrolling to the target element
})
.box {
  width: 80%;
  border: 2px dashed;
  height: 180px;
  overflow: auto;
  scroll-behavior: smooth; /* <-- for smooth scroll */
}

.boxChild {
  margin: 600px 0 300px;
  width: 40px;
  height: 40px;
  background: green;
}
<button id='scrollBtn'>Scroll to element</button>
<div class='box'>
  <div class='boxChild'></div>
</div>

Answer №2

After tweaking the response originally intended for "so hell," I realized it needed to be more versatile as it only catered to one message. To solve this, I decided to assign a unique id to each message and implemented a command to scroll to that specific id:

document.querySelector("#messageId" + messageId).scrollIntoView();

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