diff --git a/Resources-Library.md b/Resources-Library.md
index 3129197..342efd5 100644
--- a/Resources-Library.md
+++ b/Resources-Library.md
@@ -146,6 +146,24 @@ Parameters:
  - optional, CSS selector, specifies nodes from which attributes will be removed
 
 
+***
+
+### raf-if.js /
+### ~requestAnimationFrame-if.js~ [↪](https://github.com/gorhill/uBlock/blob/59bdf2b4ccd1151a296af36e5536ed00eeb07fb4/assets/resources/scriptlets.js#L394)
+
+New in [1.22.0](https://github.com/gorhill/uBlock/commit/6831967f5f9d64412a9c063f3b64104d9dce7b07)
+
+Defuses calls to _`requestAnimationFrame()`_ function when:
+- The needle **is not prefixed** with `!` and the needle **does not match** the stringified argument; OR
+- The needle **is prefixed** with `!` and the needle **matches** the stringified argument.
+
+When used without parameters, will log calls to `requestAnimationFrame()` to the console.
+
+Parameters:
+ - optional, string/_regular expression_, "The needle", matching in the stringified argument passed to
+requestAnimationFrame.
+
+
 ***
 
 ### set.js /