Update observeMutations.md

snippets/observeMutations.md

@@ -1,23 +1,27 @@
 ### observeMutations
 
-Runs the provided callback for each mutation on the specified element.
+Returns a new MutationObserver and runs the provided callback for each mutation on the specified element.
 
 Use a [`MutationObserver`](https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver) to observe mutations on the given element.
 Use `Array.forEach()` to run the callback for each mutation that is observed.
 Omit the third argument, `options`, to use the default [options](https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver#MutationObserverInit) (all `true`).
 
 ```js
-const observeMutations = (element, callback, options) => new MutationObserver(mutations => mutations.forEach(m => callback(m))).observe(element, Object.assign(
-  {
+const observeMutations = (element, callback, options) => {
+  const observer = new MutationObserver(mutations => mutations.forEach(m => callback(m)));
+  observer.observe(element, Object.assign({
     childList: true,
     attributes: true,
     attributeOldValue: true,
     characterData: true,
     characterDataOldValue: true,
     subtree: true
-  }, options));
+  }, options)); 
+  return observer;
+}
 ```
 
 ```js
-observeMutations(document, console.log); // Logs all mutations that happen on the page
+const obs = observeMutations(document, console.log); // Logs all mutations that happen on the page
+obs.disconnect(); // Disconnects the observer and stops logging mutations on the page
 ```