initial commit

node_modules/vis/lib/module/hammer.js

@@ -0,0 +1,38 @@
+/**
+ * Setup a mock hammer.js object, for unit testing.
+ *
+ * Inspiration: https://github.com/uber/deck.gl/pull/658
+ *
+ * @returns {{on: noop, off: noop, destroy: noop, emit: noop, get: get}}
+ */
+function hammerMock() {
+  const noop = () => {};
+
+  return {
+    on: noop,
+    off: noop,
+    destroy: noop,
+    emit: noop,
+
+    get: function(m) {	//eslint-disable-line no-unused-vars
+      return {
+        set: noop
+      };
+    }
+  };
+}
+
+
+if (typeof window !== 'undefined') {
+  var propagating = require('propagating-hammerjs');
+  var Hammer = window['Hammer'] || require('hammerjs');
+  module.exports = propagating(Hammer, {
+    preventDefault: 'mouse'
+  });
+}
+else {
+  module.exports = function () {
+    // hammer.js is only available in a browser, not in node.js. Replacing it with a mock object.
+    return hammerMock();
+  }
+}