Tips for expanding a CSS row to avoid gaps while utilizing the max-height property

Hey there,

I'm trying to figure out how to eliminate the gap (the orange section) that appears when I set a max-height that is smaller than the space occupied by the top section. I assumed the main section would expand to fill the empty space, but it doesn't seem to be working. Any suggestions on how I can achieve this? I've also tried using the following code without success:

grid-template-rows: 1fr auto 1fr;

Here's the complete code snippet:

    .gridcontainer {
        background-color: orange;
        height: 100vh;
        width: 100vw;
        display: grid;
        grid-template-columns: 2fr 6fr 2fr;
        grid-template-rows: 1fr 8fr 1fr;
    }
    
    .gridchild-header {
        grid-area: 1 / 1 / 2 / 4;
        background-color: yellow;
        z-index: 500;
        min-height: 50px;
        max-height: 100px;
    }
    
    .gridchild-main {
        grid-area: 2 / 1 / 3 / 3;
        background-color: cyan;
        z-index: 500;
    }
    
    .gridchild-sidebar {
        grid-area: 2 / 3 / 3 / 4;
        background-color: red;
        z-index: 500;
    }
    
    .gridchild-footer {
        grid-area: 3 / 1 / 4 / 4;
        background-color: purple;
        z-index: 500;
        min-height: 100px;
    }

https://i.sstatic.net/65Jlm1SB.jpg

Answer №1

When you encounter the gap in the orange section due to setting a max-height on the top section (header), it is important to ensure that the grid layout adjusts dynamically to changes in height. The presence of the gap is caused by the header not occupying the entire height specified in the grid, which results in the main section failing to stretch to fill the remaining space.

Here are some suggested solutions to address this issue:

To prevent gaps, set the row height of the header to auto so that it can adjust based on its content:

.gridcontainer {
    background-color: orange;
    height: 100vh;
    width: 100vw;
    display: grid;
    grid-template-columns: 2fr 6fr 2fr;
    grid-template-rows: auto 1fr auto; /* Adjusted */
}

If you wish to control the maximum height of the header while allowing the main section to expand, consider using the minmax function:

.gridcontainer {
    background-color: orange;
    height: 100vh;
    width: 100vw;
    display: grid;
    grid-template-columns: 2fr 6fr 2fr;
    grid-template-rows: minmax(50px, 100px) 1fr auto; /* Adjusted */
}

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