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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.

/* Point values */
line-height-step: 18pt;

Initial value0
Applies toblock container elements
Inheritedyes
Mediavisual
Computed valueabsolute <length>
Animation typediscrete
Canonical orderper grammar

Syntax

The line-height-step property is specified as any one of the following:

Values

<length>
The specified <length> is used in the calculation of the line box height step.

Formal syntax

<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 is shown below in the following screenshot:

How the line-height-step property affects the appearance of text.

Specifications

Specification Status Comment
CSS Rhythmic Sizing
The definition of 'line-height-step' in that specification.
Working Draft Initial definition.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support ? ? ? ? 47 ?
Feature Android Webview Chrome for Android Edge Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 59 59 ? ? ? 47 ?

 

See also

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