在开发中一切都很好，但在Heroku中就不行了。我甚至还在HTML中添加了一些内容，如在Stimulus文档中所写：

<div data-controller="hello">
  <input type="text">
  <button>Greet</button>
</div>

并添加到connect（）中的hello_controller.js

console.log("it works")

甚至这在heroku上也不起作用（在控制台中也是如此）。
manifest.js:

//= link_tree ../images
//= link_directory ../stylesheets .css
//= link_tree ../../javascript .js
//= link_tree ../../../vendor/javascript .js
//= link custom.css

index.js:

// Import and register all your controllers from the importmap under controllers/*

import { application } from "controllers/application"

// Eager load all controllers defined in the import map under controllers/**/*_controller
import { eagerLoadControllersFrom } from "@hotwired/stimulus-loading"
eagerLoadControllersFrom("controllers", application)

// Lazy load controllers as they appear in the DOM (remember not to preload controllers in import map!)
// import { lazyLoadControllersFrom } from "@hotwired/stimulus-loading"
// lazyLoadControllersFrom("controllers", application)

application.js:

import { Application } from "@hotwired/stimulus"

const application = Application.start()

// Configure Stimulus development experience
application.debug = false
window.Stimulus   = application

export { application }

importmap.rb:

pin "application", preload: true
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 "popper", to: 'popper.js', preload: true
pin "bootstrap", to: 'bootstrap.min.js', preload: true

在仅与js相关的application.html.erb中：

<%= javascript_importmap_tags %>

只有一条线索：

Uncaught TypeError: Failed to resolve module specifier "application". Relative references must start with either "/", "./", or "../".

它不应该出现在chrome中，但它出现在生产中。Heroku日志显示一切正常，部署时也一切正常，除了：

Stopping all processes with SIGTERM
Process exited with status 143

但谷歌说，这不是大问题。这里额外的宝石，我补充说：

gem "devise", "~> 4.8"
gem 'bootstrap', '~> 5.1.3'
gem "sassc-rails"
gem "rails-controller-testing"
gem "will_paginate", "~> 3.3"
group :production do
  gem "pg", "1.3.5"
end

感谢你的帮助