Implement Dynamic Sticky Tab Bar

Introduction

In this project, you will learn how to implement a dynamic tab bar that fixes to the top of the page when the user scrolls down. This feature is commonly seen in mobile apps and websites, providing a smooth and intuitive user experience.

👀 Preview

🎯 Tasks

In this project, you will learn:

• How to set up the dynamic tab bar using CSS positioning
• How to implement the scrolling behavior to keep the tab bar in its original position until the user scrolls past the title bar
• How to test the dynamic tab bar feature and ensure it works as expected

🏆 Achievements

After completing this project, you will be able to:

• Use CSS position: sticky property to create a fixed tab bar
• Test and debug the dynamic tab bar feature to provide a seamless user experience

Set Up the Project Structure

To get started, open the experiment environment, and the directory structure is as follows:

├── css
│   └── style.css
├── images
│   ├── 1.png
│   └── 2.png
├── index.html
└── js
    └── index.js

Among them:

• css/style.css is the style file.
• index.html is the main page.
• js/index.js is the js file of the page.
• The images folder contains the image files used in the project.

1. Click on Go Live button in the bottom right corner of WebIDE, to run the project.

2. Open "Web 8080" on the top of the VM and refresh it manually, the effect should be as follows:

   

3. Copy the address beginning with http in the image above in your browser and open a new window.

Set Up the Dynamic Tab Bar

In this step, you will learn how to set up the dynamic tab bar that will fix to the top of the page when the user scrolls down.

1. Open the style.css file in the css directory.
2. Locate the .buttons class in the CSS file. This class represents the tab bar.
3. Add the following CSS code inside the .buttons class:

position: sticky;
top: 0;

The position: sticky property makes the tab bar stick to the top of the page when the user scrolls down. The top: 0 property ensures that the tab bar is fixed at the top of the page.

Test the Dynamic Tab Bar

1. Save the changes to the style.css file.
2. Refresh the browser window that is displaying the web page.
3. Scroll the page up and down, and observe the behavior of the tab bar. It should stay in its original position until the user scrolls down past the title bar, at which point it should fix to the top of the page.

Congratulations! You have successfully implemented the dynamic tab bar feature for the course website.

Summary

Congratulations! You have completed this project. You can practice more labs in LabEx to improve your skills.