grid-auto-columns#

#Introduction

The grid-auto-columns CSS property specifies the size of an implicitly-created grid column track or pattern of tracks.

If a grid item is positioned into a column that is not explicitly sized by grid-template-columns, implicit grid tracks are created to hold it. This can happen either by explicitly positioning into a column that is out of range, or by the auto-placement algorithm creating additional columns.

#Examples

css-apisrc/grid-auto-columns/App.tsx

Preview

#Syntax

/* Keyword values */
grid-auto-columns: max-content;
grid-auto-columns: auto;

/* <length> values */
grid-auto-columns: 100px;

/* <percentage> values */
grid-auto-columns: 10%;
grid-auto-columns: 33.3%;

/* <flex> values */
grid-auto-columns: 0.5fr;
grid-auto-columns: 3fr;

/* minmax() values */
grid-auto-columns: minmax(100px, auto);
grid-auto-columns: minmax(max-content, 2fr);

/* fit-content() values */
grid-auto-columns: fit-content(400px);
grid-auto-columns: fit-content(20%);

/* multiple track-size values */
grid-auto-columns: 100px 150px 390px;
grid-auto-columns: 10% 33.3%;
grid-auto-columns: 0.5fr 3fr 1fr;
grid-auto-columns: 100px minmax(100px, auto) 10% 0.5fr fit-content(400px);

#Values

• auto

  Default value.

  As a maximum represents the largest max-content size of the items in that track.

  As a minimum represents the largest minimum size of items in that track (specified by the min-width/min-height of the items). This is often, though not always, the min-content size.

  If used outside of minmax() notation, auto represents the range between the minimum and maximum described above.

  Info

  auto track sizes (and only auto track sizes) can be stretched by the align-content and justify-content properties. Therefore by default, an auto sized track will take up any remaining space in the grid container.

• <length>

  Is a non-negative length.

• <percentage>

  Is a non-negative <percentage> value relative to the inline size of the grid container.

• <flex>

  Is a non-negative dimension with the unit fr specifying the track's flex factor. Each <flex>-sized track takes a share of the remaining space in proportion to its flex factor.

  When appearing outside a minmax() notation, it implies an automatic minimum (i.e. minmax(auto, <flex>)).

• max-content

  Is a keyword representing the largest maximal content contribution of the grid items occupying the grid track.

• minmax(min, max)

  Is a functional notation that defines a size range, greater than or equal to min, and less than or equal to max. If max is smaller than min, then max is ignored and the function is treated as min. As a maximum, a <flex> value sets the track's flex factor. It is invalid as a minimum.

• fit-content( [ <length> | <percentage> ] )

  Represents the formula max(minimum, min(limit, max-content)), where minimum represents an auto minimum (which is often, but not always, equal to a min-content minimum), and limit is the track sizing function passed as an argument to fit-content(). This is essentially calculated as the smaller of minmax(auto, max-content) and minmax(auto, limit).

#Formal definition

#Formal syntax

grid-auto-columns =
  <track-size>+

<track-size> =
  <track-breadth>                                   |
  minmax( <inflexible-breadth> , <track-breadth> )  |
  fit-content( <length-percentage [0,∞]> )

<track-breadth> =
  <length-percentage [0,∞]>  |
  <flex [0,∞]>               |
  max-content                |
  auto

<inflexible-breadth> =
  <length-percentage [0,∞]>  |
  max-content                |
  auto

<length-percentage> =
  <length>      |
  <percentage>

#Difference between web

• [line-names], min-content are not supported.

#Compatibility