diff --git a/esbuild.mjs b/esbuild.mjs
index 2d18ae3a..30480e0c 100644
--- a/esbuild.mjs
+++ b/esbuild.mjs
@@ -3,7 +3,7 @@ import * as esbuild from 'esbuild'
 import fs from 'fs'
 // import htmlPlugin from '@chialab/esbuild-plugin-html'
 import server from './server.js'
-import { clients, plugins } from './scripts/esbuildPlugins.mjs'
+import { clients, plugins, setSingleFileBuild } from './scripts/esbuildPlugins.mjs'
 import { generateSW } from 'workbox-build'
 import { getSwAdditionalEntries } from './scripts/build.js'
 import { build } from 'esbuild'
@@ -11,7 +11,11 @@ import { build } from 'esbuild'
 //@ts-ignore
 try { await import('./localSettings.mjs') } catch { }
 
-fs.writeFileSync('dist/index.html', fs.readFileSync('index.html', 'utf8').replace('<!-- inject script -->', '<script src="index.js"></script>'), 'utf8')
+const singleFileBuild = false
+
+setSingleFileBuild(singleFileBuild)
+
+fs.writeFileSync('./dist/index.html', fs.readFileSync('index.html', 'utf8').replace('<!-- inject script -->', '<script src="index.js"></script>'), 'utf8')
 
 const watch = process.argv.includes('--watch') || process.argv.includes('-w')
 const prod = process.argv.includes('--prod')
diff --git a/prismarine-viewer/esbuild.mjs b/prismarine-viewer/esbuild.mjs
index 91b787db..900895ad 100644
--- a/prismarine-viewer/esbuild.mjs
+++ b/prismarine-viewer/esbuild.mjs
@@ -6,6 +6,7 @@ import * as esbuild from 'esbuild'
 import { polyfillNode } from 'esbuild-plugin-polyfill-node'
 import path, { dirname, join } from 'path'
 import { fileURLToPath } from 'url'
+import { spawn } from 'child_process'
 
 const dev = process.argv.includes('-w')
 
@@ -22,17 +23,20 @@ fs.copyFileSync(join(__dirname, 'playground.html'), join(__dirname, 'public/inde
 fsExtra.copySync(mcDataPath, join(__dirname, 'public/mc-data'))
 const availableVersions = fs.readdirSync(mcDataPath).map(ver => ver.replace('.js', ''))
 
+const headlessBuild = process.argv.includes('--headless')
+let prevExec
+
 /** @type {import('esbuild').BuildOptions} */
 const buildOptions = {
   bundle: true,
-  entryPoints: [join(__dirname, './examples/playground.ts')],
+  entryPoints: [join(__dirname, headlessBuild ? './examples/headless.js' : './examples/playground.ts')],
   // target: ['es2020'],
   // logLevel: 'debug',
   logLevel: 'info',
-  platform: 'browser',
+  platform: headlessBuild ? 'node' : 'browser',
   sourcemap: dev ? 'inline' : false,
   minify: !dev,
-  outfile: join(__dirname, 'public/playground.js'),
+  outfile: join(__dirname, headlessBuild ? 'public/headless.js' : 'public/playground.js'),
   mainFields: [
     'browser', 'module', 'main'
   ],
@@ -48,42 +52,53 @@ const buildOptions = {
     stream: 'stream-browserify',
     net: 'net-browserify',
   },
+  external: headlessBuild ? ['minecraft-data'] : [],
   inject: [],
   metafile: true,
   loader: {
     '.png': 'dataurl',
   },
   plugins: [
-    {
-      name: 'minecraft-data',
+    ...headlessBuild ? [{
+      name: 'starter',
       setup (build) {
-        build.onLoad({
-          filter: /minecraft-data[\/\\]data.js$/,
-        }, () => {
-          const defaultVersionsObj = {}
-          return {
-            contents: `window.mcData ??= ${JSON.stringify(defaultVersionsObj)};module.exports = { pc: window.mcData }`,
-            loader: 'js',
-          }
-        })
-        build.onEnd((e) => {
-          if (e.errors.length) return
-          fs.writeFileSync(join(__dirname, 'public/metafile.json'), JSON.stringify(e.metafile), 'utf8')
+        prevExec?.kill()
+        prevExec = spawn(`node`, [join(__dirname, 'public/headless.js')], {
+          stdio: 'inherit'
         })
       }
-    },
-    polyfillNode({
-      polyfills: {
-        fs: false,
-        crypto: false,
-        events: false,
-        http: false,
-        stream: false,
-        buffer: false,
-        perf_hooks: false,
-        net: false,
+    }] : [
+      {
+        name: 'minecraft-data',
+        setup (build) {
+          build.onLoad({
+            filter: /minecraft-data[\/\\]data.js$/,
+          }, () => {
+            const defaultVersionsObj = {}
+            return {
+              contents: `window.mcData ??= ${JSON.stringify(defaultVersionsObj)};module.exports = { pc: window.mcData }`,
+              loader: 'js',
+            }
+          })
+          build.onEnd((e) => {
+            if (e.errors.length) return
+            fs.writeFileSync(join(__dirname, 'public/metafile.json'), JSON.stringify(e.metafile), 'utf8')
+          })
+        }
       },
-    })
+      polyfillNode({
+        polyfills: {
+          fs: false,
+          crypto: false,
+          events: false,
+          http: false,
+          stream: false,
+          buffer: false,
+          perf_hooks: false,
+          net: false,
+        },
+      })
+    ]
   ],
 }
 if (dev) {
diff --git a/scripts/esbuildPlugins.mjs b/scripts/esbuildPlugins.mjs
index 07938c6e..978157ff 100644
--- a/scripts/esbuildPlugins.mjs
+++ b/scripts/esbuildPlugins.mjs
@@ -12,6 +12,9 @@ const { supportedVersions } = MCProtocol
 const prod = process.argv.includes('--prod')
 let connectedClients = []
 
+let singleFileBuild = false
+export const setSingleFileBuild = (v) => singleFileBuild = v
+
 /** @type {import('esbuild').Plugin[]} */
 const plugins = [
   {
@@ -64,11 +67,26 @@ const plugins = [
         }
       })
 
-      build.onEnd(async ({ metafile, outputFiles }) => {
+      build.onEnd(async ({ metafile, outputFiles = [], errors }) => {
+        if (errors.length) return
         // write outputFiles
-        //@ts-ignore
-        for (const file of outputFiles) {
-          await fs.promises.writeFile(file.path, file.contents)
+        if (singleFileBuild) {
+          const jsFile = outputFiles.find(outputFile => outputFile.path.endsWith('.js'))?.contents
+          const cssFile = outputFiles.find(outputFile => outputFile.path.endsWith('.css'))?.contents
+          let html = fs.readFileSync('./index.html', 'utf8')
+          html = html.replace('<!-- inject script -->', `<script>${jsFile}</script>`)
+          html = html.replace('<link rel="stylesheet" href="index.css">', `<style>${cssFile}</style>`)
+
+          const favicon = fs.readFileSync('./assets/favicon.png', 'base64')
+          html = html.replace(`<link rel="icon" type="image/png" href="data:image/png;base64,${favicon}" />`, ``)
+          html = html.replace('<link rel="favicon" href="favicon.ico">', '')
+          html = html.replace('<link rel="manifest" href="manifest.json" crossorigin="use-credentials">', '')
+          fs.writeFileSync('./dist/minecraft.html', html)
+          outputFiles
+        } else {
+          for (const file of outputFiles) {
+            await fs.promises.writeFile(file.path, file.contents)
+          }
         }
         if (!prod) return
         // const deps = Object.entries(metafile.inputs).sort(([, a], [, b]) => b.bytes - a.bytes).map(([x, { bytes }]) => [x, filesize(bytes)]).slice(0, 5)
@@ -133,7 +151,7 @@ const plugins = [
         }
 
         // write metafile to disk if needed to analyze
-        // fs.writeFileSync('dist/meta.json', JSON.stringify(metafile, null, 2))
+        fs.writeFileSync('dist/meta.json', JSON.stringify(metafile, null, 2))
 
         /** @type {import('esbuild').OutputFile} */
         //@ts-ignore
diff --git a/src/react/Slider.tsx b/src/react/Slider.tsx
index bc6c5890..73468fe6 100644
--- a/src/react/Slider.tsx
+++ b/src/react/Slider.tsx
@@ -55,6 +55,9 @@ const Slider: React.FC<Props> = ({
         max={max}
         value={value}
         disabled={!!disabledReason}
+        onPointerDown={(e) => {
+          (e.target as HTMLElement).setPointerCapture(e.pointerId)
+        }}
         onChange={(e) => {
           const newValue = Number(e.target.value)
           setValue(newValue)