The line-height-step
CSS property defines the step units for line box heights. When the step unit is positive, line box heights are rounded up to the closest multiple of the unit. Negative values are invalid.
/* Keyword values */ line-height-step: none; /* Point values */ line-height-step: 18pt;
Initial value | none |
---|---|
Applies to | block container elements |
Inherited | yes |
Media | visual |
Computed value | an absolute length; if the keyword none is specified, the computed value is 0 |
Animation type | discrete |
Canonical order | per grammar |
Syntax
The line-height-step
property is specified as any one of the following:
Values
none
- No value is given.
<length>
- The specified
<length>
is used in the calculation of the line box height step.
Formal syntax
none | <length>
Examples
In the following example, the height of line box in each paragraph is rounded up to the step unit. The line box in <h1>
does not fit into one step unit and thus occupies two, but it is still centered within the two step unit.
:root { font-size: 12pt; --my-grid: 18pt; line-height-step: var(--my-grid); } h1 { font-size: 20pt; margin-top: calc(2 * var(--my-grid)); }
The result of these rules are shown below.
Specifications
Specification | Status | Comment |
---|---|---|
CSS Rhythmic Sizing The definition of 'line-height-step' in that specification. |
Working Draft | Initial definition. |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 59 | ? | ? | ? | 47 | ? |
Feature | Android Webview | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|
Basic support | 59 | 59 | ? | ? | ? | 47 | ? |