files/en-us/web/css/reference/values/display-outside/index.md
The <display-outside> keywords specify the element's outer {{CSSxRef("display")}} type, which is essentially its role in flow layout. These keywords are used as values of the display property, and can be used for legacy purposes as a single keyword, or as defined in the Level 3 specification alongside a value from the {{CSSxRef("<display-inside>")}} keywords.
Valid <display-outside> values:
block
inline
[!NOTE] When browsers encounter a display property with only an outer
displayvalue (e.g.,display: blockordisplay: inline), the inner value defaults toflow(e.g.,display: block flowanddisplay: inline flow). This is backwards-compatible with single-keyword syntax.
{{csssyntax}}
In the following example, span elements (normally displayed as inline elements) are set to display: block and so break onto new lines and expand to fill their container in the inline dimension.
<span>span 1</span> <span>span 2</span>
span {
display: block;
border: 1px solid rebeccapurple;
}
{{EmbedLiveSample("Examples", 300, 60)}}
{{Specifications}}
{{Compat}}
{{CSSxRef("display")}}