Update README.md

Author: nicolaskruchten

README.md

@@ -134,7 +134,7 @@ In short, this means that simply adding data points to a trace in `data` or chan
 | `debug`            | `Boolean`                    | `false`                                           | Assign the graph div to `window.gd` for debugging                                                                                                                     |
 | `useResizeHandler` | `Boolean`                    | `false`                                           | When true, adds a call to `Plotly.Plot.resize()` as a `window.resize` event handler                                                                                   |
 
-**Note**: To make a plot responsive, i.e. to fill its containing element and resize when the window is resized, use `style` or `className` to set the dimensions of the element (i.e. using `width: 100%; height: 100%` or some similar values) and set `useResizeHandler` to `true` while setting `layout.autosize` to `true` and leaving `layout.height` and `layout.width` undefined. This will implement the behaviour documented here: https://plot.ly/javascript/responsive-fluid-layout/
+**Note**: To make a plot responsive, i.e. to fill its containing element and resize when the window is resized, use `style` or `className` to set the dimensions of the element (i.e. using `width: 100%; height: 100%` or some similar values) and set `useResizeHandler` to `true` while setting `layout.autosize` to `true` and leaving `layout.height` and `layout.width` undefined. This can be seen in action in [this CodePen](https://codepen.io/nicolaskruchten/pen/ERgBZX) and will implement the behaviour documented here: https://plot.ly/javascript/responsive-fluid-layout/
 
 #### Callback signature: `Function(figure, graphDiv)`