How to Prevent Upward Jumps While Dynamically Scrolling a DIV to Bottom Using CSS Only?

Dynamically Scrolling DIV to Bottom While Preventing Upward Jumps

Problem Overview

You wish to establish a DIV element that automatically scrolls to the bottom upon loading and maintains this scrolled position unless the user scrolls upward. This behavior is necessary for dynamically updating content within the DIV, ensuring that newly added content remains visible at the bottom without abrupt jumps to the top.

Solution

A CSS-only solution can achieve this desired behavior:

Step 1: Flexbox Configuration

Use flex-direction: column-reverse to reverse the flow of the content within the DIV. This makes the browser treat the bottom as the top, effectively scrolling to the bottom initially.

Step 2: Markup Reversal

Since the content order is reversed, ensure that the markup is structured in reverse order, with the content you want to display at the bottom first.

CSS Code:

<code class="css">.container {
  height: 100px;
  overflow: auto;
  display: flex;
  flex-direction: column-reverse;
}</code>

HTML Code:

<code class="html"><div class="container">
  <div>Bottom</div>
  <div>Hi</div>
  <!-- Additional content here -->
  <div>Top</div>
</div></code>

Explanation:

With this setup, the content is initially scrolled to the "Bottom" element. When new content is added dynamically, it gets placed at the "Bottom" of the DIV, and the flexbox layout automatically scrolls the DIV to the bottom, while preventing it from jumping upwards when the user scrolls back to the bottom.

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