feat: add validateMermaid fn

Author: tamas-excalidraw

src/index.ts

@@ -1,6 +1,7 @@
 import { DEFAULT_FONT_SIZE } from "./constants.js";
 import { graphToExcalidraw } from "./graphToExcalidraw.js";
 import { parseMermaid } from "./parseMermaid.js";
+import { validateMermaid } from "./validateMermaid.js";
 
 export interface MermaidConfig {
   /**
@@ -60,4 +61,4 @@ const parseMermaidToExcalidraw = async (
   return excalidrawElements;
 };
 
-export { parseMermaidToExcalidraw };
+export { parseMermaidToExcalidraw, validateMermaid };

src/validateMermaid.ts

@@ -0,0 +1,5 @@
+import mermaid from "mermaid";
+
+export async function validateMermaid(mermaidStr: string) {
+  return mermaid.parse(mermaidStr, { suppressErrors: true });
+}