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---
layout: ../../layouts/content.astro
title: Hot Module Replacement (HMR) API
description: Snowpack implements HMR via the esm-hmr spec, an attempted standard for ESM-based Hot Module Replacement (HMR).
---
Snowpack implements HMR via the [esm-hmr](https://github.com/pikapkg/esm-hmr) spec, an attempted standard for ESM-based Hot Module Replacement (HMR).
```js
// HMR Code Snippet Example
if (import.meta.hot) {
import.meta.hot.accept(({ module }) => {
// Accept the module, apply it into your application.
});
}
```
Full API Reference: [snowpack/esm-hmr on GitHub](https://github.com/snowpackjs/esm-hmr)
[Learn more](/concepts/hot-module-replacement) about HMR, Fast Refresh, and how it's meant to work in Snowpack.
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