How to Center Elements on the Last Row with Flexbox?

How to Center Elements on the Last Row Using Flexbox

When using CSS grid to lay out multiple items, it can be challenging to align them within a row. Grids are primarily designed for aligning items within a column or track, making it difficult to achieve alignment across an entire row.

Why CSS Grid is Unsuitable

CSS grids utilize a system of tracks and cells, with tracks running either horizontally or vertically. When placing items within a grid cell, you can control their alignment within that particular cell. However, aligning items across multiple cells or an entire row is hindered by the crisscrossing tracks.

Using Flexbox for Alignment

A more suitable approach for aligning items across a row is to use flexbox. Flexbox is specifically designed to arrange items along a single axis (horizontal or vertical), giving you more control over alignment.

To center elements on the last row using flexbox, apply the following steps:

1. Wrap the items within a flex container.
2. Set the justify-content property to center to align the items horizontally within the container.
3. Use the flex property to specify the desired width and flexibility of each item.
4. Ensure all elements have the box-sizing property set to border-box to include padding and borders in their overall width calculation.

Example Code

The following code snippet demonstrates how to achieve centered alignment on the last row using flexbox:

#container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.item {
  flex: 0 0 calc(16.66% - 20px);
  background: teal;
  color: white;
  padding: 20px;
  margin: 10px;
}

* {
  box-sizing: border-box;
}

Explanation

In this example:

• The #container is set up as a flex container with flex-wrap: wrap to allow items to wrap onto multiple lines.
• The justify-content: center ensures that items are centered horizontally within the container.
• The flex property is used to calculate the width of each item dynamically based on the available space.
• Setting box-sizing: border-box guarantees that padding and borders are included in the item's overall width, preventing uneven spacing.

By using flexbox, you can achieve centered alignment on the last row, regardless of the number of items, making your layout more visually appealing.

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