transform-box

The transform-box property defines the layout box, to which the transform and transform-origin properties relate to.

Initial value	border-box
Applies to	transformable elements
Inherited	no
Media	visual
Computed value	as specified
Animatable	no
Canonical order	the unique non-ambiguous order defined by the formal grammar

Syntax

/* Keyword values */
transform-box: border-box;
transform-box: fill-box;
transform-box: view-box;

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

Values

border-box

Uses the border box as reference box. The reference box of a table is the border box of its table wrapper box, not its table box.

fill-box

Uses the object bounding box as reference box.

view-box

Uses the nearest SVG viewport as reference box. If a viewBox attribute is specified for the SVG viewport creating element, the reference box is positioned at the origin of the coordinate system established by the viewBox attribute and the dimension of the reference box is set to the width and height values of the viewBox attribute.

Formal syntax

border-box | fill-box | view-box

Specifications

Specification	Status	Comment
CSS Transforms Level 1 The definition of 'transform-box' in that specification.	Working Draft	Initial definition

Browser compatibility

[1] This property is implemented in Gecko 43.0 (Firefox 43 / Thunderbird 43 / SeaMonkey 2.40) behind the preference svg.transform-box.enabled, defaulting to false. Initially it was implemented in Gecko 41.0 (Firefox 41 / Thunderbird 41 / SeaMonkey 2.38) with the preference named svg.transform-origin.enabled. See bug 923193 and bug 1208550.

See also

• Using CSS Transforms