How Can I Ensure Equal Width for All Elements in a Flexbox Layout?

Flexbox: Ensuring Equal Width for All Elements

In attempts to create a responsive flexbox navbar with varying item quantities, developers may encounter an issue where the width distribution among elements is uneven. This article explores a solution to this challenge.

Background

The tutorial followed initially utilized display:table to achieve equal width distribution, but encountered issues when shifting to flexbox. Flexbox defaults flex-basis to auto, which uses the content size as the initial size for each flex item. Consequently, items with larger content size occupy more space.

Solution: Flex-basis to 0

To ensure equal width for all elements, we set flex-basis to 0. This eliminates the initial size, leaving all remaining space to be distributed proportionally based on flex-grow.

Example

The following code snippet demonstrates how setting flex-basis to 0 solves the issue:

li {
  flex-grow: 1;
  flex-basis: 0;
  /* ... */
}

Visual Explanation

The diagram below from the CSS Flexbox specification illustrates the concept of flex-basis:

[Diagram from CSS Flexbox specification]

Working Example

Reference the modified Fiddle to observe the equal width distribution:

[Working Fiddle]

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