move drupal js loading to head, reload scripts

[evanmwillhite]

Attempt to fix #287

Companion PR (must be merged together): drupal-pattern-lab/attach-library-twig-extension#7

• Moves Drupal scripts/symlinking instructions to PL head file
• Adds JavaScript to reload JavaScript files inserted within patterns using attach_library

Testing:

1. Test as standalone Emulsify installation
2. Test inside of Drupal by using behaviors and following the wiki instructions (will need to be updated a little to reflect the change if we include this).
3. Test any other way you can think of to make sure this is working OK (on client projects, etc.)

Notes:
Tested in latest Chrome, Safari and Firefox, IE Edge and 11.

[philwolstenholme]

Hi @evanmwillhite, this looks like it'll solve part of the JS problem I was having earlier today. Quick question though, where is the data-name attribute added? I can't see a reference to it in https://github.com/drupal-pattern-lab/attach-library-twig-extension or in Emulsify?

[evanmwillhite]

@philwolstenholme thanks for letting me know. There needed to be a companion PR in the attach_library repo. I've created that and referenced it above!

[evanmwillhite]

@philwolstenholme I've tweaked the reloading script here to both wait until the scripts have been loaded and run Drupal.attachBehaviors() if applicable. Can you verify this is working for you? Thanks!

[evanmwillhite]

Also, @philwolstenholme I fixed this as a part of it.

[evanmwillhite]

Nevermind, I'm getting inconsistent attachBehaviors experiences depending on the number of scripts loading. Moving back to WIP.

[ModulesUnraveled]