align-content

A propriedade CSS align-content define a distribuição entre e ao redor dos items do conteúdo do eixo transversal de uma flexbox ou do eixo de bloco de uma grid.

O exemplo interativo abaixo use Grid Layout para demonstrar alguns dos valores dessa propriedade.

This property has no effect on single line flex containers (i.e. ones with flex-wrap: nowrap).

Syntax

/* Basic positional alignment */
/* align-content does not take left and right values */
align-content: center;     /* Pack items around the center */
align-content: start;      /* Pack items from the start */
align-content: end;        /* Pack items from the end */
align-content: flex-start; /* Pack flex items from the start */
align-content: flex-end;   /* Pack flex items from the end */

/* Normal alignment */
align-content: normal;

/* Baseline alignment */
align-content: baseline;
align-content: first baseline;
align-content: last baseline;

/* Distributed alignment */
align-content: space-between; /* Distribute items evenly
                                 The first item is flush with the start,
                                 the last is flush with the end */
align-content: space-around;  /* Distribute items evenly
                                 Items have a half-size space
                                 on either end */
align-content: space-evenly;  /* Distribute items evenly
                                 Items have equal space around them */
align-content: stretch;       /* Distribute items evenly
                                 Stretch 'auto'-sized items to fit
                                 the container */

/* Overflow alignment */
align-content: safe center;
align-content: unsafe center;

/* Global values */
align-content: inherit;
align-content: initial;
align-content: unset;

Values

start
The items are packed flush to each other against the start edge of the alignment container in the cross axis.
end
The items are packed flush to each other against the end edge of the alignment container in the cross axis.
flex-start
The items are packed flush to each other against the edge of the alignment container depending on the flex container's cross-start side.
This only applies to flex layout items. For items that are not children of a flex container, this value is treated like start.
flex-end
The items are packed flush to each other against the edge of the alignment container depending on the flex container's cross-end side.
This only applies to flex layout items. For items that are not children of a flex container, this value is treated like end.
center
The items are packed flush to each other in the center of the alignment container along the cross axis.
normal
The items are packed in their default position as if no align-content value was set.
baseline
first baseline

last baseline
the baseline is the line upon which most letters "sit" and below which descenders extend.
Specifies participation in first- or last-baseline alignment: aligns the alignment baseline of the box’s first or last baseline set with the corresponding baseline in the shared first or last baseline set of all the boxes in its baseline-sharing group.
The fallback alignment for first baseline is start, the one for last baseline is end.
space-between
The items are evenly distributed within the alignment container along the cross axis. The spacing between each pair of adjacent items is the same. The first item is flush with the start edge of the alignment container in the cross axis, and the last item is flush with the end edge of the alignment container in the cross axis.
space-around
The items are evenly distributed within the alignment container along the cross axis. The spacing between each pair of adjacent items is the same. The empty space before the first and after the last item equals half of the space between each pair of adjacent items.
space-evenly
The items are evenly distributed within the alignment container along the cross axis. The spacing between each pair of adjacent items, the start edge and the first item, and the end edge and the last item, are all exactly the same.
stretch
If the combined size of the items along the cross axis is less than the size of the alignment container, any auto-sized items have their size increased equally (not proportionally), while still respecting the constraints imposed by max-height (en-US)/max-width (or equivalent functionality), so that the combined size exactly fills the alignment container along the cross axis.
safe
Used alongside an alignment keyword. If the chosen keyword means that the item overflows the alignment container causing data loss, the item is instead aligned as if the alignment mode were start.
unsafe
Used alongside an alignment keyword. Regardless of the relative sizes of the item and alignment container and whether overflow which causes data loss might happen, the given alignment value is honored.

Formal definition

Initial valuenormal
Aplica-se amulti-line flex containers
Inheritednão
Computed valueas specified
Animation typediscrete

Formal syntax

normal | (en-US) <baseline-position> | (en-US) <content-distribution> | (en-US) <overflow-position>? (en-US) <content-position>

where
<baseline-position> = [ (en-US) first | (en-US) last ] (en-US)? (en-US) baseline
<content-distribution> = space-between | (en-US) space-around | (en-US) space-evenly | (en-US) stretch
<overflow-position> = unsafe | (en-US) safe
<content-position> = center | (en-US) start | (en-US) end | (en-US) flex-start | (en-US) flex-end

Examples

CSS

#container {
  height:200px;
  width: 240px;
  align-content: center; /* Can be changed in the live sample */
  background-color: #8c8c8c;
}

.flex {
  display: flex;
  flex-wrap: wrap;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, 50px);
}

div > div {
  box-sizing: border-box;
  border: 2px solid #8c8c8c;
  width: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#item1 {
  background-color: #8cffa0;
  min-height: 30px;
}

#item2 {
  background-color: #a0c8ff;
  min-height: 50px;
}

#item3 {
  background-color: #ffa08c;
  min-height: 40px;
}

#item4 {
  background-color: #ffff8c;
  min-height: 60px;
}

#item5 {
  background-color: #ff8cff;
  min-height: 70px;
}

#item6 {
  background-color: #8cffff;
  min-height: 50px;
  font-size: 30px;
}

select {
  font-size: 16px;
}

.row {
  margin-top: 10px;
}

HTML

<div id="container" class="flex">
  <div id="item1">1</div>
  <div id="item2">2</div>
  <div id="item3">3</div>
  <div id="item4">4</div>
  <div id="item5">5</div>
  <div id="item6">6</div>
</div>

<div class="row">
  <label for="display">display: </label>
  <select id="display">
    <option value="flex">flex</option>
    <option value="grid">grid</option>
  </select>
</div>

<div class="row">
  <label for="values">align-content: </label>
  <select id="values">
    <option value="normal">normal</option>
    <option value="stretch">stretch</option>
    <option value="flex-start">flex-start</option>
    <option value="flex-end">flex-end</option>
    <option value="center" selected>center</option>
    <option value="space-between">space-between</option>
    <option value="space-around">space-around</option>
    <option value="space-evenly">space-evenly</option>

    <option value="start">start</option>
    <option value="end">end</option>
    <option value="left">left</option>
    <option value="right">right</option>

    <option value="baseline">baseline</option>
    <option value="first baseline">first baseline</option>
    <option value="last baseline">last baseline</option>

    <option value="safe center">safe center</option>
    <option value="unsafe center">unsafe center</option>
    <option value="safe right">safe right</option>
    <option value="unsafe right">unsafe right</option>
    <option value="safe end">safe end</option>
    <option value="unsafe end">unsafe end</option>
    <option value="safe flex-end">safe flex-end</option>
    <option value="unsafe flex-end">unsafe flex-end</option>
  </select>
</div>

Result

Specifications

Specification Status Comment
CSS Box Alignment Module Level 3
The definition of 'align-content' in that specification.
Rascunho atual Adds the [ first | last ]? baseline, start, end, left, right, unsafe | safe values.
CSS Flexible Box Layout Module
The definition of 'align-content' in that specification.
Candidata a Recomendação Initial definition
Initial valuenormal
Aplica-se amulti-line flex containers
Inheritednão
Computed valueas specified
Animation typediscrete

Compatibilidade com navegadores

Support in Flex layout

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Support in Grid layout

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See also