pass hash function to cssHash

src/compiler/compile/css/Stylesheet.ts

@@ -275,8 +275,8 @@ class Atrule {
 	}
 }
 
-const get_default_css_hash: CssHashGetter = ({ hash }) => {
-	return `svelte-${hash}`;
+const get_default_css_hash: CssHashGetter = ({ css, hash }) => {
+	return `svelte-${hash(css)}`;
 };
 
 export default class Stylesheet {
@@ -317,7 +317,8 @@ export default class Stylesheet {
 			this.id = get_css_hash({
 				filename,
 				name: component_name,
-				hash: hash(ast.css.content.styles)
+				css: ast.css.content.styles,
+				hash
 			});
 
 			this.has_styles = true;

src/compiler/interfaces.ts

@@ -107,7 +107,8 @@ export type ModuleFormat = 'esm' | 'cjs';
 export type CssHashGetter = (args: {
 	name: string;
 	filename: string | undefined;
-	hash: string;
+	css: string;
+	hash: (input: string) => string;
 }) => string;
 
 export interface CompileOptions {