add initial marp implementation with sample content and build configuration

node_modules/mathjax-full/ts/util/AsyncLoad.ts

@@ -0,0 +1,44 @@
+/*************************************************************
+ *
+ *  Copyright (c) 2017-2022 The MathJax Consortium
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+/**
+ * @fileoverview  Implements asynchronous loading of files
+ *
+ * @author dpvc@mathjax.org (Davide Cervone)
+ */
+
+import {mathjax} from '../mathjax.js';
+
+/**
+ * Load a file asynchronously using the mathjax.asynchLoad method, if there is one
+ *
+ * @param {string} name  The name of the file to load
+ * @return {Promise}     The promise that is satisfied when the file is loaded
+ */
+export function asyncLoad(name: string): Promise<void> {
+  if (!mathjax.asyncLoad) {
+    return Promise.reject(`Can't load '${name}': No asyncLoad method specified`);
+  }
+  return new Promise((ok, fail) => {
+    const result = mathjax.asyncLoad(name);
+    if (result instanceof Promise) {
+      result.then((value: any) => ok(value)).catch((err: Error) => fail(err));
+    } else {
+      ok(result);
+    }
+  });
+}