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Warning: This is a property of the original CSS flexible box layout Module draft, and has been replaced by a newer standard.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 box-orient CSS property sets whether an element lays out its contents horizontally or vertically.


/* Keyword values */
box-orient: horizontal;
box-orient: vertical;
box-orient: inline-axis;
box-orient: block-axis;

/* Global values */
box-orient: inherit;
box-orient: initial;
box-orient: unset;

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



The box lays out its contents horizontally.


The box lays out its contents vertically.

inline-axis (HTML)

The box displays its children along the inline axis.

block-axis (HTML)

The box displays its children along the block axis.

The inline and block axes are the writing-mode dependent keywords which, in English, map to horizontal and vertical respectively.


HTML DOM elements lay out their contents along the inline-axis by default. This CSS property will only apply to HTML elements with a CSS display value of box or inline-box.

Formal definition

Initial valueinline-axis (horizontal in XUL)
Applies toelements with a CSS display value of box or inline-box
Computed valueas specified
Animation typediscrete

Formal syntax

box-orient =
  horizontal | vertical | inline-axis | block-axis | inherit


Setting horizontal box orientation

Here, the box-orient property will cause the two <p> sections in the example to display in the same line.


<div class="example">
  <p>I will be to the left of my sibling.</p>
  <p>I will be to the right of my sibling.</p>


div.example {
  display: -moz-box; /* Mozilla */
  display: -webkit-box; /* WebKit */
  display: box; /* As specified */

  /* Children should be oriented vertically */
  -moz-box-orient: horizontal; /* Mozilla */
  -webkit-box-orient: horizontal; /* WebKit */
  box-orient: horizontal; /* As specified */



Not part of any standard.

Browser compatibility

BCD tables only load in the browser

See also