multiple controllers, textarea limitation or controller dependencies about stimulus-library HOT 1 CLOSED

Hypothesis 1 was moot ('controller references mixins and utilities') based on experience (see below).
hypothesis 2 ('char_count_controller be applicable to only textarea and not to trix-editor tags?') was also wrong. It is nice to see the char_count_controller running on a trix-editor tag!

For those interested in the details, the counter flakes out when 'empty', then indicates '12' with the first character entered - thus rails action-text is already reserving 11 characters.

hypothesis 3 was correct. The controller was mis-defined.

This reader attempted to use the src material from the repository. Error.

Stumbling upon this resource made life so much simpler.

[suggestion @Sub-Xaero : the cover page (or the /docs page) should have a sixth block referencing these working code examples]

Solution. defining the char_count_controller.js tweaking it - based on how stimulus is installed/invoked - as

import { Application } from "@hotwired/stimulus";
// import { Application } from "stimulus";
import { CharCountController } from "stimulus-library";

const application = Application.start();

application.register("char-count", CharCountController);

from stimulus-library.