Update onUserInputChange.md

snippets/onUserInputChange.md

@@ -1,23 +1,18 @@
 ### onUserInputChange
 
-Will run the callback whenever the user changes their input type (either `mouse` or `touch`). This is useful
+Run the callback whenever the user input type changes (`mouse` or `touch`). Useful for enabling/disabling code depending on the input device. This process is dynamic and works with hybrid devices (e.g. touchscreen laptops).
-if you want to disable certain code depending on if the user is using touch as input or a mouse (including trackpads).
 
 Use two event listeners. Assume `mouse` input initially and bind a `touchstart` event listener to the document. 
-On `touchstart`, the callback is run and supplied with the current input type as an argument. 
+On `touchstart`, add a `mousemove` event listener to listen for two consecutive `mousemove` events firing within 20ms, using `performance.now()`.
-Then, add a `mousemove` event listener to listen for two consecutive `mousemove` events firing within 20ms 
+Run the callback with the input type as an argument in either of these situations.
-using `performance.now()` (browsers recently fire them every animation frame). Run the callback and supply the new type
-`mouse` as the argument. This process needs to happen dynamically because of hybrid devices (such as a touchscreen laptop), 
-where the user can switch between either input type at will.
 
 ```js
 const onUserInputChange = callback => {
   let type = 'mouse', lastTime = 0;
   const mousemoveHandler = () => {
     const now = performance.now();
-    if (now - lastTime < 20) {
+    if (now - lastTime < 20) 
       type = 'mouse', callback(type), document.removeEventListener('mousemove', mousemoveHandler);
-    }
     lastTime = now;
   };
   document.addEventListener('touchstart', () => {