How Do I Implement Vertical Scrolling in Full-Height Flexbox Applications?

Flexbox and Vertical Scrolling in Full-Height Applications

The Challenge

Developers often aim to create full-height web applications using flexbox layout. However, encountering the challenge of integrating vertical scrolling within a flexbox layout can be frustrating.

Old Flexbox Solution

The traditional approach, compatible with older versions of flexbox, involves leveraging CSS properties like display: box to achieve full-height and overflow behavior.

Newer Flexbox Solution

For the latest flexbox implementation, a workaround known as the "height: 0px" hack has been employed. This method introduces a container with height: 0px to trigger vertical scrolling, but it comes with its own drawbacks.

Solution: Setting a Height for the Scrollable Element

To overcome these limitations, the most effective solution is to set a height to the vertical scrollable element. This ensures that the element is rendered with appropriate space for scrolling.

Setting a Minimum Height

Depending on the desired behavior, you can choose to set a minimum height (e.g., min-height: 100px) or a fixed height (e.g., height: 100px).

Examples

Full vertical scroll:

#container article {
    flex: 1 1 auto;
    overflow-y: auto;
    min-height: 0px;
}

Fixed minimum height scroll:

#container article {
    flex: 1 1 auto;
    overflow-y: auto;
    min-height: 100px;
}

By employing these techniques, you can seamlessly combine flexbox layout with vertical scrolling in your full-height applications, providing an optimal user experience.

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