Add onresize event handler example (mdn#86)

* Add resize event example

* Add a point about resize-event example

* Update README

* use addEventListener

README.md

@@ -5,21 +5,21 @@ Code examples that accompany various MDN DOM and Web API documentation pages.
 
 * The "auxclick" directory contains a simple example demonstrating the new <code>auxclick</code> event type. See [GlobalEventHandlers.auxclick](https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onauxclick) for more details, or [run the example live](https://mdn.github.io/dom-examples/auxclick/).
 
-* The "canvas" directory contains an example "chroma-keying" demonstrating how to use the Canvas API to manipulate videos: see [Manipulating video using canvas](https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Manipulating_video_using_canvas) or [run the example live](http://mdn.github.io/dom-examples/canvas/chroma-keying/).
+* The "canvas" directory contains an example "chroma-keying" demonstrating how to use the Canvas API to manipulate videos: see [Manipulating video using canvas](https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Manipulating_video_using_canvas) or [run the example live](https://mdn.github.io/dom-examples/canvas/chroma-keying/).
 
-* The "channel-messaging-basic" directory contains a simple example demonstrating the basics of channel messaging; see [Channel Messaging API](https://developer.mozilla.org/en-US/docs/Web/API/Channel_Messaging_API) or [run the example live](http://mdn.github.io/dom-examples/channel-messaging-basic/).
+* The "channel-messaging-basic" directory contains a simple example demonstrating the basics of channel messaging; see [Channel Messaging API](https://developer.mozilla.org/en-US/docs/Web/API/Channel_Messaging_API) or [run the example live](https://mdn.github.io/dom-examples/channel-messaging-basic/).
 
-* The "channel-messaging-multimessage" directory contains another channel messaging demo, showing how multiple messages can be sent between browsing contexts. See [Channel Messaging API](https://developer.mozilla.org/en-US/docs/Web/API/Channel_Messaging_API) for more details. [Run the demo live](http://mdn.github.io/dom-examples/channel-messaging-multimessage/).
+* The "channel-messaging-multimessage" directory contains another channel messaging demo, showing how multiple messages can be sent between browsing contexts. See [Channel Messaging API](https://developer.mozilla.org/en-US/docs/Web/API/Channel_Messaging_API) for more details. [Run the demo live](https://mdn.github.io/dom-examples/channel-messaging-multimessage/).
 
 * The "drag-and-drop" directory is for examples and demos of the [HTML Drag and Drop](https://developer.mozilla.org/en-US/docs/Web/API/HTML_Drag_and_Drop_API) standard.
 
-* The "fullscreen-api" directory is for examples and demos of the [Fullscreen API](https://wiki.developer.mozilla.org/en-US/docs/Web/API/Fullscreen_API). Run the [example live](http://mdn.github.io/dom-examples/fullscreen-api/).
+* The "fullscreen-api" directory is for examples and demos of the [Fullscreen API](https://wiki.developer.mozilla.org/en-US/docs/Web/API/Fullscreen_API). Run the [example live](https://mdn.github.io/dom-examples/fullscreen-api/).
 
 * The "indexeddb-api" directory contains a demo for the [IndexedDB API](https://mdn.github.io/dom-examples/indexeddb-api/index.html).
 
-* The "insert-adjacent" directory contains simple demos for [insertAdjacentElement](http://mdn.github.io/dom-examples/insert-adjacent/insertAdjacentElement.html) and [insertAdjacentText](http://mdn.github.io/dom-examples/insert-adjacent/insertAdjacentText.html).
+* The "insert-adjacent" directory contains simple demos for [insertAdjacentElement](https://mdn.github.io/dom-examples/insert-adjacent/insertAdjacentElement.html) and [insertAdjacentText](https://mdn.github.io/dom-examples/insert-adjacent/insertAdjacentText.html).
 
-* The "matchmedia" directory contains a simple demo to test matchMedia functionality. See [Window.matchMedia](https://developer.mozilla.org/en-US/docs/Web/API/Window/matchMedia) for more details. [Run the demo live](http://mdn.github.io/dom-examples/matchmedia/).
+* The "matchmedia" directory contains a simple demo to test matchMedia functionality. See [Window.matchMedia](https://developer.mozilla.org/en-US/docs/Web/API/Window/matchMedia) for more details. [Run the demo live](https://mdn.github.io/dom-examples/matchmedia/).
 
 * The "mediaquerylist" directory contains a simple demo to test more advanced matchMedia/mediaquerylist functionality. See [MediaQueryList](https://developer.mozilla.org/en-US/docs/Web/API/MediaQueryList) for more details. [Run the demo live](https://mdn.github.io/dom-examples/mediaquerylist/index.html).
 
@@ -31,13 +31,15 @@ Code examples that accompany various MDN DOM and Web API documentation pages.
 
 * The "pointerevents" directory is for examples and demos of the [Pointer Events](https://developer.mozilla.org/en-US/docs/Web/API/Pointer_events) standard.
 
-* The "pointer-lock" directory contains a simple demo to show usage of the Pointer Lock API. You can find more explanation of how the demo works at the main MDN [Pointer Lock API](https://developer.mozilla.org/en-US/docs/Web/API/Pointer_Lock_API) page. [Run the demo live](http://mdn.github.io/dom-examples/pointer-lock/).
+* The "pointer-lock" directory contains a simple demo to show usage of the Pointer Lock API. You can find more explanation of how the demo works at the main MDN [Pointer Lock API](https://developer.mozilla.org/en-US/docs/Web/API/Pointer_Lock_API) page. [Run the demo live](https://mdn.github.io/dom-examples/pointer-lock/).
 
-* The "reporting-api" directory contains a couple of simple demos to show usage of the Reprting API. You can find more explanation of how the API works in the main MDN [Reporting API](https://developer.mozilla.org/en-US/docs/Web/API/Reporting_API) docs. [Run the deprecation report demo live](http://mdn.github.io/dom-examples/reporting-api/deprecation_report.html).
+* The "reporting-api" directory contains a couple of simple demos to show usage of the Reprting API. You can find more explanation of how the API works in the main MDN [Reporting API](https://developer.mozilla.org/en-US/docs/Web/API/Reporting_API) docs. [Run the deprecation report demo live](https://mdn.github.io/dom-examples/reporting-api/deprecation_report.html).
 
-* The "screenleft-screentop" directory contains a demo to show how you could use the [Window.screenLeft](https://developer.mozilla.org/en-US/docs/Web/API/Window/screenLeft) and [Window.screenTop](https://developer.mozilla.org/en-US/docs/Web/API/Window/screenTop) properties to draw a circle on a canvas that always stays in the same physical place on the screen when you move your browser window. [Run the demo live](http://mdn.github.io/dom-examples/screenleft-screentop/).
+* The "resize-event" directory contains a simple demo to show how you can use the [resize event](https://developer.mozilla.org/en-US/docs/Web/API/Window/resize_event). Resize the browser window either by height or width to see the size of your current window. [Run the demo live](https://mdn.github.io/dom-examples/resize-event).
 
-* The "scrolltooptions" directory contains a demo to show how you could use the [ScrollToOptions](https://developer.mozilla.org/en-US/docs/Web/API/ScrollToOptions) dictionary along with the [Window.ScrollTo()](https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollTo) method to programmatically scroll a web page. [Run the demo live](http://mdn.github.io/dom-examples/scrolltooptions/).
+* The "screenleft-screentop" directory contains a demo to show how you could use the [Window.screenLeft](https://developer.mozilla.org/en-US/docs/Web/API/Window/screenLeft) and [Window.screenTop](https://developer.mozilla.org/en-US/docs/Web/API/Window/screenTop) properties to draw a circle on a canvas that always stays in the same physical place on the screen when you move your browser window. [Run the demo live](https://mdn.github.io/dom-examples/screenleft-screentop/).
+
+* The "scrolltooptions" directory contains a demo to show how you could use the [ScrollToOptions](https://developer.mozilla.org/en-US/docs/Web/API/ScrollToOptions) dictionary along with the [Window.ScrollTo()](https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollTo) method to programmatically scroll a web page. [Run the demo live](https://mdn.github.io/dom-examples/scrolltooptions/).
 
 * The "server-sent-events" directory contains a very simple SSE demo that uses PHP to create the server. You can find more information in our [Using server-sent events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events) article. To run the demo you'll need to serve the files from a server that supports PHP; [MAMP](https://www.mamp.info/en/) is a good PHP test server environment.
 
@@ -47,6 +49,6 @@ Code examples that accompany various MDN DOM and Web API documentation pages.
 
 * The "web-animations-api" directory contains [Web Animation API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Animations_API) demos. See the [web animations README](web-animations-api/README.md) for more information.
 
-* The "web-storage" directory contains a simple demo to show usage of the Web Storage API. For more detail on how it works, read [Using the Web Storage API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API/Using_the_Web_Storage_API). [View the demo live](http://mdn.github.io/dom-examples/web-storage/).
+* The "web-storage" directory contains a simple demo to show usage of the Web Storage API. For more detail on how it works, read [Using the Web Storage API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API/Using_the_Web_Storage_API). [View the demo live](https://mdn.github.io/dom-examples/web-storage/).
 
-* The "web-share" directory contains a simple demo to show usage of the [Web Share API](https://developer.mozilla.org/en-US/docs/Web/API/Navigator/share). For more detail on how it works, read. [View the demo live](http://mdn.github.io/dom-examples/web-share/).
+* The "web-share" directory contains a simple demo to show usage of the [Web Share API](https://developer.mozilla.org/en-US/docs/Web/API/Navigator/share). For more detail on how it works, read. [View the demo live](https://mdn.github.io/dom-examples/web-share/).

resize-event/index.html

@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="description" content="A resize event demo on MDN" />
+    <title>Window Size Logger</title>
+  </head>
+  <body>
+    <p>Resize the browser window to fire the <code>resize</code> event.</p>
+    <p>Window height: <span id="height"></span></p>
+    <p>Window width: <span id="width"></span></p>
+
+    <script>
+      const heightOutput = document.querySelector("#height");
+      const widthOutput = document.querySelector("#width");
+
+      function resizeListener() {
+        heightOutput.textContent = window.innerHeight;
+        widthOutput.textContent = window.innerWidth;
+      }
+
+      window.addEventListener("resize", resizeListener);
+    </script>
+  </body>
+</html>