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Author: andrewconnell

docs/general-development/client-side-web-parts-maintenance-mode.md

@@ -1,46 +1,43 @@
 ---
 title: Maintenance mode for client-side web parts
-ms.date: 12/18/2017
+ms.date: 10/21/2020
 ms.prod: sharepoint
 ms.assetid: 3ebd2a11-8291-4228-add0-9e0cd899dd3c
 localization_priority: Normal
 ---
-
 # Maintenance mode for client-side web parts
 
-_**Applies to:** Office 365_
-
 When working with client-side web parts, you can load them in maintenance mode. The maintenance mode can be helpful when trying to debug issues related to web parts placed on the page.
 
 ## Switch to maintenance mode
 
 > [!NOTE]
 > In order to load a page in the maintenance mode, you have to have edit permissions for that specific page.
 
-To switch to the maintenance mode, navigate to the page and in the URL append `?maintenancemode=true`, for example:
+To switch to the maintenance mode, navigate to the page and in the URL append **?maintenancemode=true**, for example:
 
 ```text
 https://contoso.sharepoint.com/sites/team?maintenancemode=true
 ```
 
-To leave the maintenance mode, remove `?maintenancemode=true` from the URL and reload the page.
+To leave the maintenance mode, remove **?maintenancemode=true** from the URL and reload the page.
 
 ## Available information
 
 The maintenance mode shows various information about each web part on the page.
 
 ### Web part summary
 
-When in maintenance mode, for each web part you will see the following summary information:
+When in maintenance mode, for each web part you'll see the following summary information:
 
 ![Web part summary information displayed in maintenance mode](../images/maintenance-mode-summary.png)
 
 Property|Description
 --------|-----------
 Alias|Web part alias
-Id|The unique ID of the web part
-InstanceId|The ID of a specific instance of a web part (that is, if you have two more of the same web parts on a page, they will each have the same web part ID, but a different instance ID.
-IsInternal|Indicates whether the web part was made by Microsoft or a third party. If `true`, it is made by Microsoft. If `false`, it is made by a third party.
+ID|The unique ID of the web part
+InstanceId|The ID of a specific instance of a web part (that is, if you have two more of the same web parts on a page, they'll each have the same web part ID, but a different instance ID.
+IsInternal|Indicates whether the web part was made by Microsoft or a third party. If `true`, it's made by Microsoft. If `false`, it's made by a third party.
 Version|The version number of the web part.
 Environment|Enumeration indicating the environment on which the web part is running. Possible values: `1` - Local Workbench, `2` - SharePoint
 UserAgent|A string that contains information about the device and software in use (such as browser type and version).
@@ -54,7 +51,7 @@ To get more information about the web part, switch to the **Manifest** tab.
 By exploring the manifest information, you can learn details such as:
 
 - where the web part bundle is hosted
-- which external scripts is the web part loading and from where
+- which external scripts are the web part loading and from where
 - what version of the SharePoint Framework has the web part been built on
 - which components of the SharePoint Framework does the web part use
 
@@ -66,18 +63,18 @@ Another piece of information available in the maintenance mode, is web part data
 
 ![Web part data information displayed in maintenance mode](../images/maintenance-mode-data.png)
 
-Using the information from the **Data** tab, you can see the configuration for each web part. This is helpful when trying to reproduce errors reported by users which could be caused by a specific web part configuration.
+Using the information from the **Data** tab, you can see the configuration for each web part. This is helpful when trying to reproduce errors reported by users that could be caused by a specific web part configuration.
 
 If the web part [integrates its properties with SharePoint](../spfx/web-parts/guidance/integrate-web-part-properties-with-sharepoint.md), the data section shows the types and values that are passed to SharePoint for further processing.
 
 ## Considerations
 
-- the maintenance mode works for client-side web parts placed on both modern and classic SharePoint pages. See the [Open and use the web part maintenance page](https://support.office.com/article/Open-and-use-the-web-part-maintenance-page-eff9ce22-d04a-44dd-ae83-ac29a5e396c2#PickTab=2016,_2013) support article, to get more information about opening classic web parts in maintenance view
-- to open page in maintenance mode, you have to have edit permissions for that page
-- when in maintenance mode, web part code is not being executed and you cannot edit web part properties
-- in maintenance mode, you can delete or move web parts on the page
-- the maintenance mode shows only information about web parts. You cannot use it to show information about SharePoint Framework extensions that are executed on the page
-- switching to maintenance mode only disables executing web part code. Any SharePoint Framework extensions registered on the page will still execute
+- The maintenance mode works for client-side web parts placed on both modern and classic SharePoint pages. See the [Open and use the web part maintenance page](https://support.office.com/article/Open-and-use-the-web-part-maintenance-page-eff9ce22-d04a-44dd-ae83-ac29a5e396c2#PickTab=2016,_2013) support article, to get more information about opening classic web parts in maintenance view.
+- To open page in maintenance mode, you have to have edit permissions for that page
+- When in maintenance mode, web part code isn't being executed and you can't edit web part properties.
+- In maintenance mode, you can delete or move web parts on the page.
+- The maintenance mode shows only information about web parts. You can't use it to show information about SharePoint Framework extensions that are executed on the page.
+- Switching to maintenance mode only disables executing web part code. Any SharePoint Framework extensions registered on the page will still execute.
 
 ## See also