CSS min-width

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The CSS min-width property is used to constrain the width of an element. The element can render at any size up to the min-width, depending on its contents.

Syntax

Possible Values

auto
The default value. For standard block elements, this computes to 0. For flex items and grid items, it provides a more reasonable default minimum size based on the content, preventing items from shrinking past their intrinsic size.
length
Specifies a minimum value for width as a length value (for example 300px). Negative values are illegal.
percentage
Specifies a minimum value for width as a percentage of the width of the containing block. Negative values are illegal. If the containing block's width is negative, the used value is zero.
min-content
The intrinsic minimum width of the content.
max-content
The intrinsic preferred width of the content.
fit-content(length-percentage)
Uses the fit-content formula with the available space replaced by the specified argument.
stretch
Expands the element's width to fill the available space of its containing block.

In addition, all CSS properties also accept the following CSS-wide keyword values as the sole component of their property value:

initial
Represents the value specified as the property's initial value.
inherit
Represents the computed value of the property on the element's parent.
unset
This value acts as either inherit or initial, depending on whether the property is inherited or not. In other words, it sets all properties to their parent value if they are inheritable or to their initial value if not inheritable.

General Information

Initial Value
auto
Applies To
All elements except non-replaced inline elements, table rows, and row groups
Inherited?
No
Media
Visual
Animatable
Yes (see example)

Example Code

Here are some examples of valid min-width values:

Official Specifications