<dashed-ident>

The <dashed-ident> CSS data type denotes an arbitrary string used as an identifier.

Syntax

The syntax of <dashed-ident> is similar to CSS identifiers (such as property names), except that it is case-sensitive. It starts with two dashes, followed by the user-defined identifier.

The double dash at the beginning makes them easily identifiable when reading through a CSS code block.

Just like <custom-ident> <dashed-ident>s are defined by the user, but unlike <custom-ident> CSS will never define a <dashed-ident>.

Examples

Using with CSS custom properties

When <dashed-ident> is used with CSS custom properties, the property is declared first and then used within a CSS var() function.

html {
  --primary-color: red;
  --secondary-color: blue;
  --tertiary-color: green;
}

h1, h4 {
  color: var(--primary-color);
}

h2, h5 {
  color: var(--secondary-color);
}

h3, h6 {
  color: var(--tertiary-color);
}

Using with @color-profile

When <dashed-ident> is used with the @color-profile at-rule, the at-rule is declared first and then used within a CSS color() function.

@color-profile --my-color-profile {
  src: url("https://example.org/SWOP2006_Coated5v2.icc");
}

.header {
  background-color: color(--my-color-profile 0% 70% 20% 0%);
}

Using with @font-palette-values

When <dashed-ident> is used with the @font-palette-values at-rule, the at-rule is declared first and then used as the value for the font-palette property.

@font-palette-values --my-palette {
  font-family: Bixa;
  base-palette: 1;
  override-colors: 0 #ff0000;
}

h1, h2, h3, h4 {
  font-palette: --my-palette;
}

Specifications

Specification
CSS Values and Units Module Level 4
# dashed-idents

Browser compatibility

As this type is not a real type but a convenience type used to simplify the definition of other CSS syntax, there is no browser compatibility information as such.

See also