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---
source: crates/biome_css_parser/tests/spec_test.rs
expression: snapshot
---
## Input
```css
div {
color: var(--a);
color: var(--a,);
color: var(--a, blue);
}
```
## AST
```
CssRoot {
bom_token: missing (optional),
rules: CssRuleList [
CssQualifiedRule {
prelude: CssSelectorList [
CssCompoundSelector {
nesting_selectors: CssNestedSelectorList [],
simple_selector: CssTypeSelector {
namespace: missing (optional),
ident: CssIdentifier {
value_token: IDENT@0..4 "div" [] [Whitespace(" ")],
},
},
sub_selectors: CssSubSelectorList [],
},
],
block: CssDeclarationOrRuleBlock {
l_curly_token: L_CURLY@4..5 "{" [] [],
items: CssDeclarationOrRuleList [
CssDeclarationWithSemicolon {
declaration: CssDeclaration {
property: CssGenericProperty {
name: CssIdentifier {
value_token: IDENT@5..15 "color" [Newline("\n"), Whitespace(" ")] [],
},
colon_token: COLON@15..17 ":" [] [Whitespace(" ")],
value: CssGenericComponentValueList [
CssFunction {
name: CssIdentifier {
value_token: IDENT@17..20 "var" [] [],
},
l_paren_token: L_PAREN@20..21 "(" [] [],
items: CssParameterList [
CssParameter {
any_css_expression: CssListOfComponentValuesExpression {
css_component_value_list: CssComponentValueList [
CssDashedIdentifier {
value_token: IDENT@21..24 "--a" [] [],
},
],
},
},
],
r_paren_token: R_PAREN@24..25 ")" [] [],
},
],
},
important: missing (optional),
},
semicolon_token: SEMICOLON@25..26 ";" [] [],
},
CssDeclarationWithSemicolon {
declaration: CssDeclaration {
property: CssGenericProperty {
name: CssIdentifier {
value_token: IDENT@26..36 "color" [Newline("\n"), Whitespace(" ")] [],
},
colon_token: COLON@36..38 ":" [] [Whitespace(" ")],
value: CssGenericComponentValueList [
CssFunction {
name: CssIdentifier {
value_token: IDENT@38..41 "var" [] [],
},
l_paren_token: L_PAREN@41..42 "(" [] [],
items: CssParameterList [
CssParameter {
any_css_expression: CssListOfComponentValuesExpression {
css_component_value_list: CssComponentValueList [
CssDashedIdentifier {
value_token: IDENT@42..45 "--a" [] [],
},
],
},
},
COMMA@45..46 "," [] [],
],
r_paren_token: R_PAREN@46..47 ")" [] [],
},
],
},
important: missing (optional),
},
semicolon_token: SEMICOLON@47..48 ";" [] [],
},
CssDeclarationWithSemicolon {
declaration: CssDeclaration {
property: CssGenericProperty {
name: CssIdentifier {
value_token: IDENT@48..58 "color" [Newline("\n"), Whitespace(" ")] [],
},
colon_token: COLON@58..60 ":" [] [Whitespace(" ")],
value: CssGenericComponentValueList [
CssFunction {
name: CssIdentifier {
value_token: IDENT@60..63 "var" [] [],
},
l_paren_token: L_PAREN@63..64 "(" [] [],
items: CssParameterList [
CssParameter {
any_css_expression: CssListOfComponentValuesExpression {
css_component_value_list: CssComponentValueList [
CssDashedIdentifier {
value_token: IDENT@64..67 "--a" [] [],
},
],
},
},
COMMA@67..69 "," [] [Whitespace(" ")],
CssParameter {
any_css_expression: CssListOfComponentValuesExpression {
css_component_value_list: CssComponentValueList [
CssIdentifier {
value_token: IDENT@69..73 "blue" [] [],
},
],
},
},
],
r_paren_token: R_PAREN@73..74 ")" [] [],
},
],
},
important: missing (optional),
},
semicolon_token: SEMICOLON@74..75 ";" [] [],
},
],
r_curly_token: R_CURLY@75..77 "}" [Newline("\n")] [],
},
},
],
eof_token: EOF@77..77 "" [] [],
}
```
## CST
```
0: CSS_ROOT@0..77
0: (empty)
1: CSS_RULE_LIST@0..77
0: CSS_QUALIFIED_RULE@0..77
0: CSS_SELECTOR_LIST@0..4
0: CSS_COMPOUND_SELECTOR@0..4
0: CSS_NESTED_SELECTOR_LIST@0..0
1: CSS_TYPE_SELECTOR@0..4
0: (empty)
1: CSS_IDENTIFIER@0..4
0: IDENT@0..4 "div" [] [Whitespace(" ")]
2: CSS_SUB_SELECTOR_LIST@4..4
1: CSS_DECLARATION_OR_RULE_BLOCK@4..77
0: L_CURLY@4..5 "{" [] []
1: CSS_DECLARATION_OR_RULE_LIST@5..75
0: CSS_DECLARATION_WITH_SEMICOLON@5..26
0: CSS_DECLARATION@5..25
0: CSS_GENERIC_PROPERTY@5..25
0: CSS_IDENTIFIER@5..15
0: IDENT@5..15 "color" [Newline("\n"), Whitespace(" ")] []
1: COLON@15..17 ":" [] [Whitespace(" ")]
2: CSS_GENERIC_COMPONENT_VALUE_LIST@17..25
0: CSS_FUNCTION@17..25
0: CSS_IDENTIFIER@17..20
0: IDENT@17..20 "var" [] []
1: L_PAREN@20..21 "(" [] []
2: CSS_PARAMETER_LIST@21..24
0: CSS_PARAMETER@21..24
0: CSS_LIST_OF_COMPONENT_VALUES_EXPRESSION@21..24
0: CSS_COMPONENT_VALUE_LIST@21..24
0: CSS_DASHED_IDENTIFIER@21..24
0: IDENT@21..24 "--a" [] []
3: R_PAREN@24..25 ")" [] []
1: (empty)
1: SEMICOLON@25..26 ";" [] []
1: CSS_DECLARATION_WITH_SEMICOLON@26..48
0: CSS_DECLARATION@26..47
0: CSS_GENERIC_PROPERTY@26..47
0: CSS_IDENTIFIER@26..36
0: IDENT@26..36 "color" [Newline("\n"), Whitespace(" ")] []
1: COLON@36..38 ":" [] [Whitespace(" ")]
2: CSS_GENERIC_COMPONENT_VALUE_LIST@38..47
0: CSS_FUNCTION@38..47
0: CSS_IDENTIFIER@38..41
0: IDENT@38..41 "var" [] []
1: L_PAREN@41..42 "(" [] []
2: CSS_PARAMETER_LIST@42..46
0: CSS_PARAMETER@42..45
0: CSS_LIST_OF_COMPONENT_VALUES_EXPRESSION@42..45
0: CSS_COMPONENT_VALUE_LIST@42..45
0: CSS_DASHED_IDENTIFIER@42..45
0: IDENT@42..45 "--a" [] []
1: COMMA@45..46 "," [] []
3: R_PAREN@46..47 ")" [] []
1: (empty)
1: SEMICOLON@47..48 ";" [] []
2: CSS_DECLARATION_WITH_SEMICOLON@48..75
0: CSS_DECLARATION@48..74
0: CSS_GENERIC_PROPERTY@48..74
0: CSS_IDENTIFIER@48..58
0: IDENT@48..58 "color" [Newline("\n"), Whitespace(" ")] []
1: COLON@58..60 ":" [] [Whitespace(" ")]
2: CSS_GENERIC_COMPONENT_VALUE_LIST@60..74
0: CSS_FUNCTION@60..74
0: CSS_IDENTIFIER@60..63
0: IDENT@60..63 "var" [] []
1: L_PAREN@63..64 "(" [] []
2: CSS_PARAMETER_LIST@64..73
0: CSS_PARAMETER@64..67
0: CSS_LIST_OF_COMPONENT_VALUES_EXPRESSION@64..67
0: CSS_COMPONENT_VALUE_LIST@64..67
0: CSS_DASHED_IDENTIFIER@64..67
0: IDENT@64..67 "--a" [] []
1: COMMA@67..69 "," [] [Whitespace(" ")]
2: CSS_PARAMETER@69..73
0: CSS_LIST_OF_COMPONENT_VALUES_EXPRESSION@69..73
0: CSS_COMPONENT_VALUE_LIST@69..73
0: CSS_IDENTIFIER@69..73
0: IDENT@69..73 "blue" [] []
3: R_PAREN@73..74 ")" [] []
1: (empty)
1: SEMICOLON@74..75 ";" [] []
2: R_CURLY@75..77 "}" [Newline("\n")] []
2: EOF@77..77 "" [] []
```