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The grid-auto-flow CSS property controls how the auto-placement algorithm works, specifying exactly how auto-placed items get flowed into the grid.

/* Keyword values */
grid-auto-flow: row;
grid-auto-flow: column;
grid-auto-flow: dense;
grid-auto-flow: row dense;
grid-auto-flow: column dense;

/* Global values */
grid-auto-flow: inherit;
grid-auto-flow: initial;
grid-auto-flow: unset;

Initial valuerow
Applies togrid containers
Computed valueas specified
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar


This property may take one of two forms:

  • a single keyword: one of row, column, or dense.
  • two keywords: row dense or column dense.


Is a keyword specifying that the auto-placement algorithm places items, by filling each row in turn, adding new rows as necessary. If neither row nor column is provided, row is assumed.
Is a keyword specifying that the auto-placement algorithm places items, by filling each column in turn, adding new columns as necessary.
Is a keyword specifying that the auto-placement algorithm uses a “dense” packing algorithm, which attempts to fill in holes earlier in the grid, if smaller items come up later. This may cause items to appear out-of-order, when doing so would fill in holes left by larger items.

If it is omitted, a “sparse” algorithm is used, where the placement algorithm only ever moves “forward” in the grid when placing items, never backtracking to fill holes. This ensures that all of the auto-placed items appear “in order”, even if this leaves holes that could have been filled by later items.

Formal syntax

[ row | column ] || dense


HTML Content

<div id="grid">
  <div id="item1"></div>
  <div id="item2"></div>
  <div id="item3"></div>
  <div id="item4"></div>
  <div id="item5"></div>
<select id="direction" onchange="changeGridAutoFlow()">
  <option value="column">column</option>
  <option value="row">row</option>
<input id="dense" type="checkbox" onchange="changeGridAutoFlow()">
<label for="dense">dense</label>

CSS Content

#grid {
  height: 200px;
  width: 200px;
  display: grid;
  grid-gap: 10px;
  grid-template: repeat(4, 1fr) / repeat(2, 1fr);
  grid-auto-flow: column;  /* or 'row', 'row dense', 'column dense' */

#item1 {
  background-color: lime;
  grid-row-start: 3;

#item2 {
  background-color: yellow;

#item3 {
  background-color: blue;

#item4 {
  grid-column-start: 2;
  background-color: red;

#item5 {
  background-color: aqua;


Specification Status Comment
CSS Grid Layout
The definition of 'grid-auto-flow' in that specification.
Candidate Recommendation Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Edge Opera Safari
Basic support 57.0[1] 52.0 (52.0)[2] No support (Yes) 44[3] No support[4]
Feature Android Webview Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 57.0[1] 57.0[1] (Yes) 52.0 (52.0)[2] No support 44 No support

[1] Implemented behind the experimental Web Platform features flag in chrome://flags since Chrome 29.0.

[2] Implemented behind the preference layout.css.grid.enabled since Gecko 40.0 (Firefox 40.0 / Thunderbird 40.0 / SeaMonkey 2.37), defaulting to false. Since Gecko 52.0 (Firefox 52.0 / Thunderbird 52.0 / SeaMonkey 2.49) it is enabled by default.

[3] Implemented behind the Enable experimental Web Platform features flag in chrome://flags since Opera 28.0.

[4] Experimental implementation available in Safari Technological Preview.

See also

Schlagwörter des Dokuments und Mitwirkende

 Zuletzt aktualisiert von: libbymc,