added simple math and charts modules

web/modules/charts/js/charts.es6.js

@@ -0,0 +1,46 @@
+/**
+ * @file
+ * Charts API.
+ */
+((Drupal) => {
+
+  Drupal.Charts = Drupal.Charts || {};
+  Drupal.Charts.Configs = Drupal.Charts.Configs || [];
+
+  /**
+   * @typedef {class} Drupal.Charts.Contents
+   */
+
+  Drupal.Charts.Contents = class {
+    constructor() {
+      const chartsElements = document.querySelectorAll('[data-chart]');
+      chartsElements.forEach(function (el) {
+        const id = el.getAttribute('id');
+        Drupal.Charts.Configs[id] = JSON.parse(el.getAttribute('data-chart'));
+        Drupal.Charts.Configs[id].drupalChartDivElement = el;
+        Drupal.Charts.Configs[id].drupalChartDivId = id;
+      });
+    }
+
+    initialize(id) {
+      const event = new CustomEvent('drupalChartsConfigsInitialization', {
+        detail: Drupal.Charts.Configs[id]
+      });
+      Drupal.Charts.Configs[id].drupalChartDivElement.dispatchEvent(event);
+    }
+
+    static update(id, data) {
+      if (Drupal.Charts.Configs.hasOwnProperty(id)) {
+        Drupal.Charts.Configs[id] = data;
+      }
+    }
+
+    getData(id) {
+      if (Drupal.Charts.Configs.hasOwnProperty(id)) {
+        this.initialize(id);
+        return Drupal.Charts.Configs[id];
+      }
+      return {};
+    }
+  };
+})(Drupal);