How to Make a Div Fill Its Parent's Remaining Height?

How to Make a Div Occupy the Remaining Parent Height without Position Absolute

Introduction

In web development, we often encounter situations where we want a div element to fill the remaining height of its parent container. This can be achieved using various CSS techniques, ensuring flexibility and responsiveness across browsers.

Techniques

1. Flexbox

Flexbox allows us to align and distribute elements within a container using the flex property. To make a div occupy the remaining height, set the container's display to flex and assign flex-grow: 1 to the div.

2. Grid

Grids offer a structured approach to page layout. To achieve our goal, set up a grid with a single row using grid-template-rows and assign grid-row: 2 to the div that should occupy the remaining space.

3. Calculator (Calc)

For browsers with good calc() support, this method can be straightforward. Simply set the height of the div to calc(100% - HEIGHT_OF_OTHER_CHILD).

4. Overflow

This technique relies on the overflow property. Set the container's overflow to hidden, and then assign height: 100% to the div that should expand.

Considerations

Note that these techniques may not behave consistently in all browsers. Always test your results across multiple browsers to ensure compatibility. Additionally, ensure that the height of the parent container is properly defined to avoid unintended behavior.

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