Support vendoring npm module code

README.md

@@ -78,6 +78,13 @@ The setup task will first delete any existing entries in the directory tree
 Note that all 389ds data is stored in `tmp/389ds`. So if you want to start over
 with a fresh installation, delete both that directory as well as the container.
 
+### Adding npm modules to use with Stimulus controllers
+
+The following command downloads the specified npm module to `vendor/javascript`
+and adds an entry for it to `config/importmap.rb`.
+
+    bin/importmap pin bech32 --download
+
 ### Solargraph
 
 [Solargraph](https://solargraph.org/) is a Ruby language server, which you may
@@ -98,6 +105,7 @@ command:
 
 * [Tailwind CSS](https://tailwindcss.com/)
 * [Sass](https://sass-lang.com/documentation)
+* [Stimulus](https://stimulus.hotwired.dev/handbook/)
 
 ### Testing
 

app/assets/config/manifest.js

@@ -1,3 +1,4 @@
 //= link_tree ../images
 //= link_tree ../../javascript .js
 //= link_tree ../builds
+//= link_tree ../../../vendor/javascript .js

bin/importmap

@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+
+require_relative "../config/application"
+require "importmap/commands"

config/importmap.rb

@@ -5,3 +5,4 @@ pin "@hotwired/turbo-rails", to: "turbo.min.js", preload: true
 pin "@hotwired/stimulus", to: "stimulus.min.js", preload: true
 pin "@hotwired/stimulus-loading", to: "stimulus-loading.js", preload: true
 pin_all_from "app/javascript/controllers", under: "controllers"
+pin "bech32" # @2.0.0