Bootstrap Utility API Guide: Flex Shrink

What this Bootstrap Utility API class does

Sets the CSS flex-shrink property of an element. CSS flex-shrink is a property that is used to control the ability of a flex item to shrink if necessary. It is a part of the flexbox layout system in CSS that allows developers to create flexible and responsive web page layouts.

When a container element has a fixed width and its child elements are set to display as flex items, the flex-shrink property determines whether those child elements should shrink in size to fit the available space within the container. The flex-shrink value is a number that represents the amount of available space that a flex item is allowed to shrink by.

For example, if a container element has a total width of 800px and contains three flex items, each with a width of 300px, the available space for each item is 200px. If the flex-shrink value is set to 1 for each item, and the container width is reduced to 600px, each item will shrink by 100px (1 * 100px), resulting in a total width of 200px for each item.

Example usage & available classes

<div class="d-flex bd-highlight">
  <div class="p-2 flex-shrink-0 bd-highlight">Flex item</div>
  <div class="p-2 flex-shrink-1 bd-highlight">Flex item</div>
</div>

Example override

In the example override below, we are removing the responsive option from the utility, which means it would not be available per breakpoint.

"flex-shrink": map-merge(
    map-get($utilities, "flex-shrink"),
    (
        responsive: false
    )
)

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