Let's now take a look at an example of how we can define local task links by heading back to our Hello World module. On the /hello page, let's add two local tasks—one for the regular /hello page, and the other for the configuration form where the salutation can be changed. This is a good example of using local tasks (tabs), as the configuration form is strictly related to what is on the page and is used to make changes to it.
As I mentioned, local tasks go inside a *.links.task.yml file. So, let's create one for our module with two links in it:
hello_world.page:
route_name: hello_world.hello
title: 'Hello World'
base_route: hello_world.hello
hello_world.config:
route_name: hello_world.greeting_form
title: 'Configuration'
base_route: hello_world.hello
weight: 100
As usual, the topmost lines are the machine name...
