add methods to public API

src/quizdown.ts

@@ -2,10 +2,12 @@ import App from './App.svelte';
 import parseQuizdown from './parser.js';
 import { Config } from './config.js';
 import marked from './customizedMarked.js';
+import type { Quiz } from './quiz';
 
 export interface Quizdown {
-    register(extension: QuizdownExtension): void;
-    createApp(rawQuizdown: string, node: Element, config: Config): void;
+    register(extension: QuizdownExtension): Quizdown;
+    createApp(rawQuizdown: string, node: Element, config: Config): App;
+    parseQuizdown(rawQuizdown: string, config: Config): Quiz;
     init(config: object): void;
     getMarkedParser(): typeof marked;
 }
@@ -14,12 +16,12 @@ export interface QuizdownExtension {
     setup(quizdown: Quizdown): void;
 }
 
-function register(extension: QuizdownExtension) {
-    extension.setup(this);
-    return this;
+function register(extension: QuizdownExtension): Quizdown {
+    extension.setup(this as Quizdown);
+    return this as Quizdown;
 }
 
-function createApp(rawQuizdown: string, node: Element, config: Config): void {
+function createApp(rawQuizdown: string, node: Element, config: Config): App {
     node.innerHTML = '';
     let root: ShadowRoot;
     if (!!node.shadowRoot) {
@@ -31,14 +33,15 @@ function createApp(rawQuizdown: string, node: Element, config: Config): void {
     }
     try {
         let quiz = parseQuizdown(rawQuizdown, config);
-        new App({
+        let app = new App({
             // https://github.com/sveltejs/svelte/pull/5870
             target: root,
             intro: false,
             props: {
                 quiz: quiz,
             },
         });
+        return app;
     } catch (e) {
         root.innerHTML = `${e}. App could not render. Please check your quizdown syntax.`;
     }
@@ -69,6 +72,7 @@ function getMarkedParser(): typeof marked {
 let quizdown: Quizdown = {
     init,
     register,
+    parseQuizdown,
     createApp,
     getMarkedParser,
 };