add info on webgl context lost event

Author: michaelbabyn

_posts/plotly_js/chart-events/events/2017-01-01-order10_afterplot.html

@@ -3,7 +3,7 @@
 plot_url: https://codepen.io/plotly/embed/YeGGdy/?height=500&theme-id=15263&default-tab=result
 language: plotly_js
 suite: events
-order: 11
+order: 10.2
 sitemap: false
 arrangement: horizontal
 markdown_content: |

_posts/plotly_js/chart-events/events/2017-01-01-order7_doubleclick_event.html

@@ -3,7 +3,7 @@
 plot_url: https://codepen.io/plotly/embed/WoZOdq/?height=500&theme-id=15263&default-tab=result
 language: plotly_js
 suite: events
-order: 11
+order: 10.3
 sitemap: false
 arrangement: horizontal
 markdown_content: |

_posts/plotly_js/chart-events/events/2017-01-01-order8_add_events.html

@@ -7,7 +7,7 @@
 sitemap: false
 arrangement: horizontal
 markdown_content: |
-  The following Plotly events do not emit additional data or update information: [`plotly_afterplot`](), [`plotly_autosize`](), [`plotly_deselect`](), [`plotly_doubleclick`](), [`plotly_redraw`](), and [`plotly_animated`](). These event handlers can be used to notify or trigger an additional event with the following syntax:
+  The following Plotly events do not emit additional data or update information: [`plotly_webglcontextlost`](#webgl-context-lost-event), [`plotly_afterplot`](#afterplot-event), [`plotly_autosize`](), [`plotly_deselect`](), [`plotly_doubleclick`](#double-click-event), [`plotly_redraw`](), and [`plotly_animated`](). These event handlers can be used to notify or trigger an additional event with the following syntax:
 ---
 
 function eventTriggeredHandler() {

_posts/plotly_js/chart-events/events/2018-10-04-webglcontextlost.html

@@ -0,0 +1,12 @@
+---
+name: Webgl Context Lost Event
+language: plotly_js
+suite: events
+order: 10.1
+sitemap: false
+arrangement: horizontal
+markdown_content: |
+  Plotly graphs which use webgl receive a "webgl context" from the browser which gives them access to gpu resources.
+  A program may lose its web context if the browser is overloaded with webgl contexts and is forced to shut one down.
+  The event handler: `plotly_webglcontextlost`, can be used to trigger an event after a graph using webgl loses it's webgl context.
+---