How Can I Animate or Shrink My Bootstrap Navbar on Scroll?

Animate/Shrink NavBar on Scroll Using Bootstrap

Controlling the behavior of the NavBar on scroll can greatly enhance user experience on your website. Bootstrap offers solutions for this using various methods.

Bootstrap 5:

Bootstrap 5 introduces the sticky-top class, which provides a similar effect to the previous Affix component. It fixes the NavBar at the top of the page while scrolling. However, it does not trigger an event to change the NavBar's style when it becomes fixed. To achieve this, JavaScript is necessary. One approach is to use IntersectionObserver.

Bootstrap 4:

In Bootstrap 4, the Affix component is not available. To create a sticky NavBar, use the position: sticky property (not supported in all browsers). This will stick the NavBar to the top, but you need to use JavaScript to toggle the NavBar's style when it becomes sticky. IntersectionObserver or jQuery plugins such as ScrollPos-Styler can be utilized for this purpose.

Additional Methods:

Alternatively, you can use jQuery's $(window).scroll() function to change the NavBar's style at specific scroll positions. This approach is suitable when you know the exact position where the NavBar should change.

Implementation Examples:

• [Sticky Top Navbar - IntersectionObserver Demo](https://codepen.io/ChristianMartinelli/pen/jLLYEa)
• [Sticky Top Navbar - jQuery Demo](https://codeply.com/go/62Roy6RDOa)

For more examples and details, refer to these resources:

• https://getbootstrap.com/docs/5.1/components/navbar/#sticky-top
• https://codeply.com/go/62Roy6RDOa
• https://www.itsolutionstuff.com/post/beautiful-sticky-navbar-using-bootstrap-4-with-jquery-javascript-example.html

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