You can now easily generate PDB Vue blocks for Drupal via the Vue CLI. This means that you can do your Vue development like you would on most any project with Single File Components.

1. Make sure that Vue CLI 3 is installed. https://cli.vuejs.org/guide/installation.html and create a new project in your module or theme with vue create pdb_vue

2. Add this plugin

vue add vue-cli-plugin-drupal-pdb

3. Follow the prompts and choose Initial framework and first block to generate scaffolding and an initial block.

4. Answer the remaining prompts.

(Assuming the initial framework has been generated) to create a new block you can invoke the plugin again and then choose New Block from the prompt.

vue invoke vue-cli-plugin-drupal-pdb

Each block will be its own Vue instance. This is the safest for working with Drupal when there will be other javascript working on the site in addition to Vue. Each instance can still have whatever child components it likes.

Each block will live within its own named directory inside a parent blocks directory.

One thing to note is that this file structure is different than the one initially created by Vue CLI. This means that adding other plugins via the CLI like Vuex or Router may still need to be manually wired up after installation since the CLI will not understand this new structure when it tries to modify files.

Each block will be a globally registered Vue Component. This means that blocks can interact with libraries like Vuex for state management between blocks. The danger of this mode is that it could cause problems with other normal Drupal blocks using Javascript.

Each block will be register in a *.info.yml file in the blocks directory. This directory will only contain info files since all the javascript will be in the main src directory.

By default, a *.libraries.yml file will be created. This file should be moved into the root directory of the module or theme that your PDB Vue blocks are being created in. However, if this file already exists, simply copy the contents and paste them into the existing file. The file generated for you can then be deleted. In other words, you should only have one of these files in your theme or module.

The generated *.libraries.yml file also assumes that the directory of all your PDB Vue blocks is called pdb_vue. So the path in this file should be updated to whatever the real path of those scripts is.