Coding⏱️ 2 min read📅 2026-05-31

How to Fix: z-index not working with fixed positioning

Understand why z-index is not working with fixed positioning in CSS.

Quick Answer: The issue arises because the fixed element is always positioned relative to the viewport, whereas the static element's position is determined by its normal document flow. To make the fixed element go behind the static element, set a lower z-index value for the fixed element.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. 🔧 Proven Troubleshooting Steps
  3. 🎯 Final Words

The issue you're experiencing is due to the fixed-positioned element not being able to be overlapped by a static or relatively positioned element. This is because, by default, the stacking context of a fixed-positioned element is its nearest positioned ancestor.

💡 Why You Are Getting This Error

  • [Cause]

🔧 Proven Troubleshooting Steps

Method 1: Using Z-index in CSS

  1. Step 1: Set the z-index of both elements to a value that is lower than the fixed-positioned element.

Method 2: Using Z-index and !important

  1. Step 1: Set the z-index of both elements to a value that is lower than the fixed-positioned element.

🎯 Final Words

To fix the issue, you need to set a higher z-index value on both elements or use !important to override the default stacking context of the fixed-positioned element. You can also wrap both elements in a container and apply the z-index to that container.

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