In rails 6 with webpacker you could throw in a <%= javascript_pack_tag 'alerts' %> in a view or template to inject some js.
How does this work with import maps and rails 7?
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1 Answer
As long as the code is correctly in the import map, you can reference it with:
<script type="module">import "/assets/custom/alerts.js";</script>
Presuming the file is app/javascript/custom/alerts.js
Referenced in config/importmap.rb as:
pin_all_from "app/javascript/custom", under: "custom"
And imported into the application.js:
import "custom/alerts"
Edit: I now think this is an antipattern in Rails 7. It is very easy to use Stimulus controllers instead.
Stimulus Handbook For reference
For example, to dismiss an alert when a user clicks the "x"
// app/javascript/alerts_controller.js
import { Controller } from "@hotwired/stimulus"
export default class extends Controller {
dismiss () {
this.element.style.display = 'none';
}
}
<div data-controller="alerts">
<h2> Alert! </h2>
<span data-action="click->alerts#dismiss"><i class="fas fa-times"></i></span>
</div>