Bootstrap 5 Scrollspy is used to automatically update the navigation links based on the scroll position, highlighting the corresponding section in the viewport.
To use scrollspy in Bootstrap 5, we need to add the data-bs-spy="scroll" attribute to the element that should be used for scrolling and specify the target by using the data attribute data-bs-target="".
How it works:
- First, you need to add a data-bs-spy="scroll" attribute to the element that should be used for the scrollable area.
- Next, you need to add a data-bs-target attribute to the navigation menu, which should contain the ID of the element that should be used as the scrollable area.
- Finally, you need to add a href attribute to each menu item that corresponds to the ID of a section on the page.
Syntax:
<tag data-bs-spy="scroll" data-bs-target="#..">
content...
</tag>
Bootstrap 5 Scrollspy Usage:
| Aspect | Description |
|---|
| Via data attributes | Initialize Bootstrap scrollspy using data attributes like data-bs-spy="scroll" and data-bs-target. |
| Via JavaScript | Initialize scrollspy via JavaScript by passing code inside a script tag. |
| Methods | Additional functionalities for scrollspy: refresh, dispose, getInstance, getOrCreateInstance. |
| Options | Pass scrollspy options through data attributes or JavaScript. Options include method, offset, and target. |
| Events | activate.bs.scrollspy event is automatically triggered when a new scrollspy element is activated. |
Examples of Bootstrap Scrollspy
Example 1: In this example, Bootstrap 5 Scrollspy implementation with a sticky list-group for navigation. Utilizes `data-bs-spy="scroll"` and `data-bs-target="#list-example"` attributes for scroll tracking.
HTML <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href= "https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"> <script src= "https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"> </script> <style> body { position: relative; } .list-group { position: sticky; top: 10px; } </style> </head> <body class="m-3"> <div class="row"> <div class="col-sm-3"> <div class="list-group"> <h4 class="text-success"> GeeksforGeeks </h4> <a class="list-group-item list-group-item-action " href="#item-1"> Java </a> <a class="list-group-item list-group-item-action" href="#item-2"> C++ </a> <a class="list-group-item list-group-item-action" href="#item-3"> Python </a> </div> </div> <div class="col-sm-9"> <div data-bs-spy="scroll" data-bs-target="#list-example" data-bs-offset="50" tabindex="0"> <div class="container bg-warning mt-5 pt-5 h-50"> <h4 class="text-success"> GeeksforGeeks </h4> <h2 id="item-1"> JAVA </h2> <br> <p>Java is a high-level, class-based, object-oriented </p> <p>programming language that is designed to have as </p> <p>few implementation dependencies as possible. </p> </div> <div class="container bg-warning mt-5 pt-5 h-50"> <h4 class="text-success"> GeeksforGeeks </h4> <h2 id="item-2">C++</h2> <p>C++ is a high-level general-purpose programming language </p> <p>created by Danish computer scientist Bjarne Stroustrup </p> <p>as an extension of the C programming language. </p> </div> <div class="container bg-warning mt-5 pt-5 h-50"> <h4 class="text-success"> GeeksforGeeks </h4> <h2 id="item-3"> PYTHON </h2> <p> Python is a high-level, general-purpose programming language. </p> <p>Its design philosophy emphasizes code readability with the use </p> <p>of significant indentation.</p> </div> </div> </div> </div> </body> </html> Output :
Example 2: In this example, Bootstrap 5 Scrollspy with a fixed-top navbar. Sections linked in the navbar navigate to corresponding content sections with smooth scrolling.
HTML <!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <link href= "https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" /> <script src= "https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"> </script> <style> body { position: relative; } </style> </head> <body data-bs-spy="scroll" data-bs-target=".navbar" data-bs-offset="50"> <nav class="navbar navbar-expand-sm bg-success fixed-top"> <div class="container-fluid"> <ul class="navbar-nav"> <li class="nav-item h3"> <a class="nav-link" href="#java"> Section 1 </a> </li> <li class="nav-item h3"> <a class="nav-link" href="#c++"> Section 2 </a> </li> <li class="nav-item h3"> <a class="nav-link" href="#python"> Section 3 </a> </li> </ul> </div> </nav> <div id="java" class="container bg-info mt-5 pt-5 h-50"> <h1 class="text-success"> GeeksforGeeks </h1> <h1>Java</h1> <p> Java is a high-level, class-based, object-oriented programming language </p> <p> that is designed to have as few implementation dependencies as </p> <p>possible.</p> </div> <div id="c++" class="container bg-info mt-5 pt-5 h-50"> <h1 class="text-success"> GeeksforGeeks </h1> <h1>C++</h1> <p> C++ is a high-level general-purpose programming language created by </p> <p> Danish computer scientist Bjarne Stroustrup as an extension of the C </p> <p>programming language.</p> </div> <div id="python" class="container bg-info mt-5 pt-5 h-50"> <h1 class="text-success"> GeeksforGeeks </h1> <h1>Python</h1> <p> Python is a high-level, general-purpose programming language. </p> <p> Its design philosophy emphasizes code readability with the use </p> <p>of significant indentation.</p> </div> </body> </html> Output:
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