updated marked to v5; better baseurl handling

src/base-url.ts

@@ -0,0 +1,11 @@
+
+import { marked } from 'marked';
+import { MarkdownOptions } from './render';
+
+export function base_url_walk_tokens(token: marked.Token, options: MarkdownOptions) {
+	if (options.base_url) {
+		if (token.type === 'link' || token.type === 'image') {
+			token.href = (new URL(token.href, options.base_url)).toString();
+		}
+	}
+}

src/render.ts

@@ -10,6 +10,7 @@ import { footnote_list_ext, footnote_ref_ext } from './footnotes';
 import { description_list_ext } from './description-list';
 import { resolve_async_bindings } from './async-steps';
 import { breadcrumb_nav_ext } from './breadcrumb-nav';
+import { base_url_walk_tokens } from './base-url';
 
 export interface MarkdownOptions {
 	base_url?: string;
@@ -25,13 +26,16 @@ export interface MarkdownExtension {
 }
 
 export async function render_markdown_to_html(markdown: string, options: MarkdownOptions = { }) {
-	const marked_options: marked.MarkedOptions = {
-		baseUrl: options.base_url,
+	const marked_options: marked.MarkedOptions & { async: true } = {
+		async: true,
 		breaks: options.breaks || false,
 		renderer: create_renderer(options),
 	};
 
 	marked.use({
+		walkTokens(token) {
+			base_url_walk_tokens(token, options);
+		},
 		extensions: [
 			katex_block_ext(marked_options.renderer, options),
 			katex_inline_ext(marked_options.renderer, options),
@@ -57,15 +61,7 @@ export async function render_markdown_to_html(markdown: string, options: Markdow
 	
 	const unsafe_html = options.inline
 		? marked.parseInline(markdown, marked_options)
-		: await new Promise<string>((resolve, reject) => {
-			marked.parse(markdown, marked_options, (error, unsafe_html) => {
-				if (error) {
-					return reject(error);
-				}
-
-				resolve_async_bindings(unsafe_html).then(resolve, reject);
-			});
-		});
+		: await marked.parse(markdown, marked_options).then(resolve_async_bindings);
 
 	return sanitize_html(unsafe_html, options.custom_elements);
 }