探索/组织/用户仓库样式 github 布局 (#8)

Co-authored-by: lutinglt <lutinglt@users.noreply.github.com>

src/functions/var.ts

@@ -0,0 +1,7 @@
+import type { CSSVarFunction } from "src/core/types";
+
+type CSSFallbackVar = `var(--${string}, ${string})`;
+export function fallbackVar(cssvar: CSSVarFunction, fallback: string): CSSFallbackVar {
+  const var_name = cssvar.replace("var(--", "").replace(")", "");
+  return `var(--${var_name}, ${fallback})`;
+}