Travis build: 1252

README.md

@@ -163,6 +163,7 @@ average(1, 2, 3);
 * [`hasClass`](#hasclass)
 * [`hide`](#hide)
 * [`httpsRedirect`](#httpsredirect)
+* [`observeMutations`](#observemutations-)
 * [`off`](#off)
 * [`on`](#on)
 * [`onUserInputChange`](#onuserinputchange-)
@@ -2228,6 +2229,48 @@ httpsRedirect(); // If you are on http://mydomain.com, you are redirected to htt
 <br>[⬆ Back to top](#table-of-contents)
 
 
+### observeMutations ![advanced](/advanced.svg)
+
+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) => {
+  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
+    )
+  );
+  return observer;
+};
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+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
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
 ### off
 
 Removes an event listener from an element.

snippets/observeMutations.md

@@ -9,16 +9,22 @@ Omit the third argument, `options`, to use the default [options](https://develop
 ```js
 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)); 
+  observer.observe(
+    element,
+    Object.assign(
+      {
+        childList: true,
+        attributes: true,
+        attributeOldValue: true,
+        characterData: true,
+        characterDataOldValue: true,
+        subtree: true
+      },
+      options
+    )
+  );
   return observer;
-}
+};
 ```
 
 ```js