add initial marp implementation with sample content and build configuration

node_modules/mathjax-full/ts/adaptors/chooseAdaptor.ts

@@ -0,0 +1,39 @@
+/*************************************************************
+ *
+ *  Copyright (c) 2018-2022 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  Chooses between jdsom and browser DOM adaptors
+ *
+ * @author dpvc@mathjax.org (Davide Cervone)
+ */
+
+import {liteAdaptor} from './liteAdaptor.js';
+import {browserAdaptor} from './browserAdaptor.js';
+
+let choose;
+
+try {
+  document;  // errors if not in browser
+  choose = browserAdaptor;
+} catch (e) {
+  choose = liteAdaptor;
+}
+
+/**
+ * Function to select which adaptor to use (depending on whether we are in a browser or node.js)
+ */
+export const chooseAdaptor = choose;