Selection Conditions
A quick run-through of how to create a custom condition in Drupal 8.
What is a condition in Drupal 8?
A condition is normally used for block placement. Pretty common in D7.
But we're using page manager...
A condition can also be used on page manager pages. "Selection Condition" in D7 and D8.
Problem
The summit's have a pre-mode and a post-mode.
"Great use a visibility rule!"
Not available at the moment.
Besides, I think that
visibility rules can cause
confusion for future dev.
Enter condition
This can easily be reused elsewhere.
Provides devs a quick way to see that there are different layouts for a "state".
Easy to start
drupal generate:plugin:condition [options]