Why Does My Fixed Sidebar Disappear When Clicking Anchor Links in Chrome and Opera?

Chrome and Opera Rendering Issue: Fixed Positioned Element Disappears with Anchor Click

The provided HTML code attempts to create a fixed sidebar on the right-hand side of the document. However, when a

element is added to the page, the fixed sidebar may occasionally disappear when an anchor link is clicked.

Chrome Solution:

To resolve the issue in Chrome, add the following style to the fixed element:

<code class="css">#sidebar {
  -webkit-transform: translateZ(0);
}</code>

In certain circumstances, Google Chrome requires the inclusion of a 3D transform to separate repainting from other CSS processes, effectively resolving the display issues.

Opera Solution:

Fixing the issue in Opera is a bit more complex. Here's a solution that forces continuous repaints:

<code class="css">@keyframes noop {
  0%   { margin-bottom: 0; }
  100% { margin-bottom: 1em; }
}

#sidebar {
    animation: noop 1s infinite;
}</code>

This animation will cause Opera to constantly recalculate and re-render layout factors, ensuring the fixed positioning remains stable.

Note:

While this solution effectively resolves the bug in most cases, there may be occasional minor flickering as Opera attempts to re-establish the fixed positioning.

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