How to Implement Scrolling in Nested Columns with Bootstrap 5 in Your React App

Learn how to manage scrolling within nested columns in your Bootstrap 5 React application, ensuring a seamless user experience without the main browser scrollbar.
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Scrolling in Nested Columns with Bootstrap 5

When building a React application using Bootstrap 5, you might face challenges when it comes to managing scrollable content within nested columns. Specifically, you may want to create a layout consisting of multiple columns, where one of these columns contains content that can exceed the height of the viewport. This can lead to an undesirable experience if the main browser scrollbar appears instead of a scrollbar within the content column. In this guide, we will walk you through how to implement a scrolling behavior inside nested columns to ensure a smooth user experience.

Understanding the Problem

In your application, you have created a basic layout with Bootstrap that consists of two main columns. One of these columns has several nested rows with content in them. Here's the problem you are facing:

You want the content in one of the nested columns (e.g., "Box 1") to maintain a maximum height based on the viewport height.

When the content exceeds the height of "Box 1", you would like to have a scrollbar appear within that box only, rather than having the entire viewport scroll.

Basic Layout Code

Here's the basic layout you might have so far:

[[See Video to Reveal this Text or Code Snippet]]

As you can see, "Box 1" is set to expand to fill the available height. The challenge arises when importing content that exceeds this space, such as a large PDF rendered using the react-pdf package.

Solution: Implementing Scrollable Content

To achieve the desired functionality where the scroll becomes nested within "Box 1," you can follow these steps:

Step 1: Use Overflow Classes

Modify the class attribute of your desired content container to enable overflow and scrolling. You can utilize Bootstrap’s built-in classes for this purpose.

Step 2: Set Maximum Height

To ensure that the box does not exceed the viewport height while allowing scrolling, you can set a maximum height for the content using CSS calc() function.

Here's how your modified code block may look:

[[See Video to Reveal this Text or Code Snippet]]

Key Components of the Solution:

overflow-auto: This class from Bootstrap allows automatic scrolling when the content exceeds the set height.

flex-grow-1: This ensures that the box expands to fill any remaining space in its parent container.

maxHeight: By calculating the remaining height of the viewport, you control how much space the content can occupy, allowing the scrollbar to function correctly.

Conclusion

By implementing these adjustments, you can effectively manage scrolling within your nested columns in a React application using Bootstrap 5. This not only improves the usability of your application but also keeps your layout visually appealing. Remember, the goal is to provide your users with a seamless experience, especially when dealing with content that can exceed standard display boundaries. With this solution, you can achieve that scrollbar functionality exactly where you need it.

Hopefully, this post provides you with the insights and knowledge needed to tackle nested column scrolling in your Bootstrap 5 project. Happy coding!

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