Variable: hmr

const hmr: HMR;

HMR cleanup API for hot module replacement.

Use this to register cleanup callbacks that run when your module is hot-reloaded during development. This prevents memory leaks from timers, event listeners, singletons, etc.

Example:

import { hmr } from 'robo.js/hmr'

const hot = hmr.module(import.meta.url)

// Register cleanup for timers
const timer = setInterval(() => console.log('tick'), 1000)
hot.dispose(() => clearInterval(timer))

// Persist data across reloads
hot.data.counter = (hot.data.counter as number ?? 0) + 1

In production, all methods are no-ops for zero runtime overhead.

hmr

Variable: hmr

On this page