Stimulus controller we created to replace ActiveLink .

highlight_sidebar_controller.js

// src/controllers/highlight_sidebar_controller.js
import { Controller } from "stimulus"

export default class extends Controller {

  onCurrentController() {
    let activeLinks = this.data.get("active-on"));
    return activeLinks == App.controller;
  }

  connect() {
    if (this.onCurrentController()) {
      this.element.classList.add("active");
    } else {
      this.element.classList.remove("active");
    }
  }
  
}

sidebar.html

<script>
   App.controller = "Users";
</script>

(...) 

<a class="nav-link" 
   data-controller="highlight-sidebar" 
   data-highlight-sidebar-active-on="Users" 
   href="/Users">
   <span>show Users</span>
</a>