diff --git a/src/htmx.d.ts b/src/htmx.d.ts
index 45fc9781..1090aa81 100644
--- a/src/htmx.d.ts
+++ b/src/htmx.d.ts
@@ -7,8 +7,9 @@
  *
  * @param elt the element to add the class to
  * @param clazz the class to add
+ * @param delay the delay (in milliseconds before class is added)
  */
-export function addClass(elt: Element, clazz: string): void;
+export function addClass(elt: Element, clazz: string, delay?: number): void;
 
 /**
  * Issues an htmx-style AJAX request
@@ -219,8 +220,9 @@ export function process(element: Element): void;
  * https://htmx.org/api/#remove
  *
  * @param elt element to remove
+ * @param delay the delay (in milliseconds before element is removed)
  */
-export function remove(elt: Element): void;
+export function remove(elt: Element, delay?: number): void;
 
 /**
  * Removes a class from the given element
@@ -229,8 +231,9 @@ export function remove(elt: Element): void;
  *
  * @param elt element to remove the class from
  * @param clazz the class to remove
+ * @param delay the delay (in milliseconds before class is removed)
  */
-export function removeClass(elt: Element, clazz: string): void;
+export function removeClass(elt: Element, clazz: string, delay?: number): void;
 
 /**
  * Removes the given extension from htmx
diff --git a/www/api.md b/www/api.md
index d3c4fa50..994799d4 100644
--- a/www/api.md
+++ b/www/api.md
@@ -19,11 +19,20 @@ This method adds a class to the given element.
 * `elt` - the element to add the class to
 * `class` - the class to add
 
+or
+
+* `elt` - the element to add the class to
+* `class` - the class to add
+* `delay` - delay (in milliseconds ) before class is added
+
 ##### Example
 
 ```js
   // add the class 'myClass' to the element with the id 'demo'
   htmx.addClass(htmx.find('#demo'), 'myClass');
+
+  // add the class 'myClass' to the element with the id 'demo' after 1 second
+  htmx.addClass(htmx.find('#demo'), 'myClass', 1000);
 ```
 
 ### <a name="ajax"></a> Method -  [`htmx.ajax()`](#ajax)
@@ -363,11 +372,19 @@ Removes an element from the DOM
 
 * `elt` - element to remove
 
+or 
+
+* `elt` - element to remove
+* `delay` - delay (in milliseconds ) before element is removed
+
 ##### Example
 
 ```js
   // removes my-div from the DOM
   htmx.remove(htmx.find("#my-div"));
+
+  // removes my-div from the DOM after a delay of 2 seconds
+  htmx.remove(htmx.find("#my-div"), 2000);
 ```
 
 ### <a name="removeClass"></a> Method -  [`htmx.removeClass()`](#removeClass)
@@ -379,11 +396,20 @@ Removes a class from the given element
 * `elt` - element to remove the class from
 * `class` - the class to remove
 
+or
+
+* `elt` - element to remove the class from
+* `class` - the class to remove
+* `delay` - delay (in milliseconds ) before class is removed
+
 ##### Example
 
 ```js
   // removes .myClass from my-div
   htmx.removeClass(htmx.find("#my-div"), "myClass");
+
+  // removes .myClass from my-div after 6 seconds
+  htmx.removeClass(htmx.find("#my-div"), "myClass", 6000);
 ```
 
 ### <a name="removeExtension"></a> Method -  [`htmx.removeExtension()`](#removeExtension)