adding remove hint and remove hints methods to destory all hint elements on the page

Author: afshinm

intro.js

@@ -1470,6 +1470,39 @@
     }
   };
 
+  /**
+   * Removes all hint elements on the page
+   * Useful when you want to destroy the elements and add them again (e.g. a modal or popup)
+   *
+   * @api private
+   * @method _removeHints
+   */
+  function _removeHints() {
+    var hints = this._targetElement.querySelectorAll('.introjs-hint');
+
+    if (hints && hints.length > 0) {
+      for (var i = 0; i < hints.length; i++) {
+        _removeHint.call(this, hints[i].getAttribute('data-step'));
+      }
+    }
+  };
+
+  /**
+   * Remove one single hint element from the page
+   * Useful when you want to destroy the element and add them again (e.g. a modal or popup)
+   * Use removeHints if you want to remove all elements.
+   *
+   * @api private
+   * @method _removeHint
+   */
+  function _removeHint(stepId) {
+    var hint = this._targetElement.querySelector('.introjs-hint[data-step="' + stepId + '"]');
+
+    if (hint) {
+      hint.parentNode.removeChild(hint);
+    }
+  };
+
   /**
    * Add all available hints to the page
    *
@@ -1917,6 +1950,14 @@
     showHints: function () {
       _showHints.call(this);
       return this;
+    },
+    removeHints: function () {
+      _removeHints.call(this);
+      return this;
+    },
+    removeHint: function (stepId) {
+      _removeHint.call(this, stepId);
+      return this;
     }
   };