add initial marp implementation with sample content and build configuration

node_modules/@marp-team/marpit/lib/element.js

@@ -0,0 +1,66 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.marpitContainer = exports.default = void 0;
+/** @module */
+/**
+ * Marpit element class.
+ *
+ * @alias Element
+ */
+class Element {
+  /**
+   * Create a Element instance.
+   *
+   * Element instance has compatibility with a plain object that is consists by
+   * `tag` key and pairs of attribute names and values. A difference is whether
+   * object has been frozen.
+   *
+   * ```js
+   * import assert from 'assert'
+   * import { Element } from 'marpit'
+   *
+   * const obj = { tag: 'div', class: 'marpit' }
+   * const elm = new Element('div', { class: 'marpit' })
+   *
+   * // This assertion would pass.
+   * assert.deepStrictEqual(obj, { ...elm })
+   * ```
+   *
+   * @param {string} tag Tag name
+   * @param {Object} [attributes={}] Tag attributes
+   */
+  constructor(tag, attributes = {}) {
+    Object.defineProperties(this, {
+      attributes: {
+        value: attributes
+      },
+      tag: {
+        enumerable: true,
+        value: tag
+      }
+    });
+    for (const attr of Object.keys(attributes)) {
+      Object.defineProperty(this, attr, {
+        enumerable: true,
+        value: attributes[attr]
+      });
+    }
+    Object.freeze(this);
+  }
+}
+
+/**
+ * Marpit's default container.
+ *
+ * It would output `<div class="marpit"></div>`.
+ *
+ * @alias module:element.marpitContainer
+ * @type {Element}
+ */
+const marpitContainer = exports.marpitContainer = new Element('div', {
+  class: 'marpit'
+});
+var _default = exports.default = Element;