Stimulus.js Counter with History - Stimulus-js Typing CST Test
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Stimulus.js Counter with History — Stimulus-js Code
Tracks increment/decrement history.
<div data-controller="counter" data-counter-count-value="0">
<h2>Counter: <span data-counter-target="count">0</span></h2>
<div>History: <span data-counter-target="history"></span></div>
<div>
<button data-action="click->counter#increment">+</button>
<button data-action="click->counter#decrement">-</button>
<button data-action="click->counter#reset">Reset</button>
</div>
</div>
<script>
import { Application } from '@hotwired/stimulus';
const application = Application.start();
application.register('counter', class extends Stimulus.Controller {
static targets = ['count', 'history'];
static values = { count: Number };
history = [];
connect() { this.updateDisplay(); }
increment() { this.countValue++; this.history.push('Increment'); this.updateDisplay(); }
decrement() { this.countValue--; this.history.push('Decrement'); this.updateDisplay(); }
reset() { this.countValue=0; this.history.push('Reset'); this.updateDisplay(); }
updateDisplay() { this.countTarget.textContent=this.countValue; this.historyTarget.textContent=this.history.join(', '); }
});
</script>Stimulus-js Language Guide
Stimulus.js is a modest JavaScript framework designed to enhance static HTML by connecting elements to JavaScript controllers. It complements server-rendered HTML, making it ideal for modestly interactive UIs without a heavy frontend framework.
Primary Use Cases
- ▸Server-rendered apps with light JS enhancements
- ▸Rails and Turbo/Hotwire projects
- ▸Interactive form behaviors
- ▸Small UI widgets
- ▸Progressive enhancement without SPA complexity
Notable Features
- ▸Controller-based architecture
- ▸HTML-driven declarative data bindings
- ▸Lightweight (~3 KB gzipped)
- ▸Easy integration with existing markup
- ▸Automatic event handling via data attributes
Origin & Creator
Created by Basecamp (David Heinemeier Hansson and team) and first released in 2016.
Industrial Note
Stimulus is perfect for server-rendered applications that need modest interactivity, like Rails apps, Turbo-driven frontends, and progressive enhancement use-cases.