Drupal 8.x

DRUPAL 8

I installed the bootstrap 3 theme and created the sub-theme.
Before continuing with the installation of the library (bootstrap_library) I have a doubt as to whether or not to install the jquery update module.
I looked around and saw the jquery form page. But the version for drupal 8 is not present.
I argue that there is no need to install it.
Am I wrong?

for the bootstrap menu I read that it can be multilevel. In the management of the blocks I have indicated 3 as a level. I return to the site but it only displays the first level. Is there any other setting to do?

Can someone recommend me a user-friendly theme to manage firmware of specific devices?

For example: adding of components, checking status, server performance statistic, different operations.

Thank you!

I created a custom module based on the Drupal 8 Message mold.

This module creates a message when a comment is created. It's perfect.

Now I want the module to create a message when a node is flagged. I started a code but it doesn't work.

https://www.drupal.org/project/flag

How can I do this ?

https://www.drupal.org/project/message

message_activity_stream.info.yml :

Hello, 

I have a geofield content type.

I created a page and block view. Both have the same exposed filters.  Page view shows the exposed filter but not the block view.

https://docs.google.com/document/d/1O76I0sGrD1RwzW5zQctAs2Ua3HRkX8GtMrGu...

Please advise!

When I insert a new no in aritcoli I get this error
An unexpected error has occurred. Please try again later, thanks.
I use D8 and I have installed the bootstrap theme cpn its library.
I checked the log and it gives me this error.