fix: make value property work for Layer name in artrule prelude (#93)

Author: bartveneman

src/css-node.ts

@@ -189,7 +189,10 @@ export class CSSNode {
 		this.index = index
 	}
 
-	/** Get the arena (for internal/advanced use only) */
+	/**
+	 * @internal
+	 * Get the arena (for internal/advanced use only)
+	 */
 	__get_arena(): CSSDataArena {
 		return this.arena
 	}

src/parse-atrule-prelude.test.ts

@@ -518,8 +518,7 @@ describe('At-Rule Prelude Nodes', () => {
 				expect(children.some((c) => c.type === SUPPORTS_QUERY)).toBe(true)
 
 				const query = children.find((c) => c.type === SUPPORTS_QUERY)
-				expect(query?.value).toContain('display')
-				expect(query?.value).toContain('flex')
+				expect(query?.value).toContain('display: flex')
 			})
 
 			it('should trim whitespace and comments from supports queries', () => {
@@ -560,7 +559,9 @@ describe('At-Rule Prelude Nodes', () => {
 				const children = atRule?.children.filter((c) => c.type !== BLOCK) || []
 				expect(children.length).toBe(1)
 				expect(children[0].type).toBe(LAYER_NAME)
+				expect(children[0].type_name).toBe('Layer')
 				expect(children[0].text).toBe('base')
+				expect(children[0].value).toBe('base')
 			})
 
 			it('should parse comma-separated layer names', () => {
@@ -573,12 +574,15 @@ describe('At-Rule Prelude Nodes', () => {
 
 				expect(children[0].type).toBe(LAYER_NAME)
 				expect(children[0].text).toBe('base')
+				expect(children[0].value).toBe('base')
 
 				expect(children[1].type).toBe(LAYER_NAME)
 				expect(children[1].text).toBe('components')
+				expect(children[1].value).toBe('components')
 
 				expect(children[2].type).toBe(LAYER_NAME)
 				expect(children[2].text).toBe('utilities')
+				expect(children[2].value).toBe('utilities')
 			})
 		})
 

src/parse-atrule-prelude.ts

@@ -346,6 +346,9 @@ export class AtRulePreludeParser {
 			if (token_type === TOKEN_IDENT) {
 				// Layer name
 				let layer = this.create_node(LAYER_NAME, this.lexer.token_start, this.lexer.token_end)
+				// Set value to the layer name text (same as the full node text)
+				this.arena.set_value_start_delta(layer, 0)
+				this.arena.set_value_length(layer, this.lexer.token_end - this.lexer.token_start)
 				nodes.push(layer)
 			} else if (token_type === TOKEN_COMMA) {
 				// Skip comma separator