fix: split classes on all whitespace

alias.test.ts

@@ -13,6 +13,20 @@ Deno.test({
 	},
 })
 
+Deno.test({
+	name: '[alias] should substitute classes with newlines',
+	fn() {
+		const map = aliasMap([alias('alias-name', 'base-styles to-apply')])
+
+		const input = `
+			alias-name
+			alias-name-foo-bar alias-name-foo-bar-baz`
+		const output = 'base-styles to-apply base-styles to-apply base-styles to-apply'
+
+		assertEquals(lookup(map, input), output)
+	},
+})
+
 Deno.test({
 	name: '[alias] should apply variations',
 	fn() {

alias.ts

@@ -153,7 +153,7 @@ export function alias(name: string, params: AliasParams | string | AliasFn): Ali
 }
 
 function splitClasses(classes: string) {
-	return classes.split(/ +/)
+	return classes.trim().split(/\s+/)
 }
 
 function joinClassSections(sections: string[]) {