box-pack
========

**Non-standard:** This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

**Deprecated:** This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

**Warning:** This is a property of the original CSS Flexible Box Layout Module draft, and has been replaced by a newer standard. See flexbox for information about the current standard.

The **`-moz-box-pack`** and **`-webkit-box-pack`** CSS properties specify how a `-moz-box` or `-webkit-box` packs its contents in the direction of its layout. The effect of this is only visible if there is extra space in the box.

The direction of layout depends on the element's orientation: horizontal or vertical.

Syntax
------


```css
/\* Keyword values \*/
box-pack: start;
box-pack: center;
box-pack: end;
box-pack: justify;

/\* Global values \*/
box-pack: inherit;
box-pack: initial;
box-pack: unset;
```


The `box-pack` property is specified as one of the keyword values listed below.

### Values

`start`

The box packs contents at the start, leaving any extra space at the end.

`center`

The box packs contents in the center, dividing any extra space equally between the start and the end.

`end`

The box packs contents at the end, leaving any extra space at the start.

`justify`

The space is divided evenly in-between each child, with none of the extra space placed before the first child or after the last child. If there is only one child, treat the value as if it were `start`.

Notes
-----

The edge of the box designated the *start* for packing purposes depends on the box's orientation and direction:

* For horizontal elements, the *start* is the top edge.
* For vertical elements, the *start* is the left edge.

|  | **Normal** | **Reverse** |
| --- | --- | --- |
| **Horizontal** | left | right |
| **Vertical** | top | bottom |

The edge opposite to the start is designated the *end*.

If the packing is set using the element's `pack` attribute, then the style is ignored.

Formal definition
-----------------

|  |  |
| --- | --- |
| Initial value | `start` |
| Applies to | elements with a CSS `display` value of `-moz-box`, `-moz-inline-box`, `-webkit-box` or `-webkit-inline-box` |
| Inherited | no |
| Computed value | as specified |
| Animation type | discrete |

Formal syntax
-------------
```

box-pack =
  start | center | end | justify
```

Examples
--------

### Examples of box-pack


```css
div.example {
  border-style: solid;

  display: -moz-box; /\* Mozilla \*/
  display: -webkit-box; /\* WebKit \*/

  /\* Make this box taller than the children,
 so there is room for the box-pack \*/
  height: 300px;
  /\* Make this box wide enough to show the contents
 are centered horizontally \*/
  width: 300px;

  /\* Children should be oriented vertically \*/
  -moz-box-orient: vertical; /\* Mozilla \*/
  -webkit-box-orient: vertical; /\* WebKit \*/

  /\* Align children to the horizontal center of this box \*/
  -moz-box-align: center; /\* Mozilla \*/
  -webkit-box-align: center; /\* WebKit \*/

  /\* Pack children to the bottom of this box \*/
  -moz-box-pack: end; /\* Mozilla \*/
  -webkit-box-pack: end; /\* WebKit \*/
}

div.example p {
  /\* Make children narrower than their parent,
 so there is room for the box-align \*/
  width: 200px;
}
```



```html
<div class="example">
  <p>I will be second from the bottom of div.example, centered horizontally.</p>
  <p>I will be on the bottom of div.example, centered horizontally.</p>
</div>
```

Specifications
--------------

Not part of any standard.

Browser compatibility
---------------------

BCD tables only load in the browser with JavaScript enabled. Enable JavaScript to view data.

See also
--------

* `box-orient`
* `box-direction`
* `box-align`