Svelte 5 Runes: Interactive Reactive Counter Dashboard

This interactive dashboard demonstrates the power of Svelte 5's new Runes system, which introduces a more explicit and flexible way to handle reactivity. The three main Runes used are:

$state: Creates reactive state variables. When these values change, any part of the component that depends on them automatically updates. In our dashboard, count, multiplier, and history are all state variables.

$derived: Creates computed values that automatically update when their dependencies change. The doubled, multiplied, and total values are derived from the state variables and update reactively without manual recalculation.

$effect: Runs side effects when dependencies change. Our effect tracks every 5th increment and adds it to the history array, demonstrating how to perform actions in response to state changes.

The dashboard features:

• Interactive counter with increment/decrement buttons
• Real-time multiplier slider that affects derived values
• Automatic history tracking using effects
• Visual feedback through animated transitions
• Glass-morphism design with modern UI elements

This example shows how Svelte 5 Runes make reactive programming more intuitive and powerful, with clear separation between state, derived values, and side effects.