Live Reload

Last updated Apr 23, 2026 Miniflare automatically refreshes your browser when your Worker script changes when liveReload is set to true.

const mf = new Miniflare({
    liveReload: true,
});

Miniflare will only inject the <script> tag required for live-reload at the end of responses with the Content-Type header set to text/html:

export default {
    fetch() {
        const body = `
      <!DOCTYPE html>
      <html>
      <body>
        <p>Try update me!</p>
      </body>
      </html>
    `;

        return new Response(body, {
            headers: { "Content-Type": "text/html; charset=utf-8" },
        });
    },
};

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description: Install and configure the Miniflare API to dispatch events and test Cloudflare Workers locally. title: Get Started image: https://developers.cloudflare.com/workers/testing/miniflare/get-started/og.png?v=d2fdc9dd705cddd5

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