WIP

.eslintrc

@@ -0,0 +1,22 @@
+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:react-hooks/recommended",
+    "plugin:react/recommended",
+    "plugin:import/recommended",
+    "plugin:import/typescript",
+    "plugin:prettier/recommended"
+  ],
+  "rules": {
+    "@typescript-eslint/consistent-type-imports": "error"
+  },
+  "settings": {
+    "react": {
+      "version": "detect"
+    }
+  }
+}

package.json

@@ -7,36 +7,45 @@
     "start": "NODE_ENV=development snowpack dev",
     "build": "snowpack build",
     "package": "yarn gzipper c -i html,js,css build build/output",
-    "format": "prettier --write \"src/**/*.{js,jsx,ts,tsx}\"",
-    "lint": "prettier --check \"src/**/*.{js,jsx,ts,tsx}\""
+    "format": "prettier --write 'src/**/*.{ts,tsx}'",
+    "lint": "eslint 'src/**/*.{ts,tsx}'"
   },
   "dependencies": {
     "@headlessui/react": "^1.2.0",
     "@heroicons/react": "^1.0.1",
     "@meshtastic/meshtasticjs": "^0.6.12",
     "observable-hooks": "^4.0.3",
-    "react": "^17.0.0",
-    "react-dom": "^17.0.0",
+    "react": "^0.0.0-experimental-132b72d7b",
+    "react-dom": "^0.0.0-experimental-132b72d7b",
     "react-flags-select": "^2.1.2",
-    "react-hook-form": "^7.5.2",
+    "react-hook-form": "^7.6.5",
     "react-json-pretty": "^2.2.0",
     "rxjs": "^7.0.1",
     "yarn": "^1.22.10"
   },
   "devDependencies": {
     "@snowpack/plugin-dotenv": "^2.0.5",
-    "@snowpack/plugin-postcss": "^1.2.2",
+    "@snowpack/plugin-postcss": "^1.4.0",
     "@snowpack/plugin-react-refresh": "^2.5.0",
     "@snowpack/plugin-typescript": "^1.2.0",
-    "@types/react": "^17.0.5",
-    "@types/react-dom": "^17.0.4",
+    "@types/eslint": "^7.2.11",
+    "@types/react": "^17.0.6",
+    "@types/react-dom": "^17.0.5",
     "@types/snowpack-env": "^2.3.2",
+    "@typescript-eslint/eslint-plugin": "^4.24.0",
+    "@typescript-eslint/parser": "^4.24.0",
     "autoprefixer": "^10.2.5",
+    "eslint": "^7.27.0",
+    "eslint-config-prettier": "^8.3.0",
+    "eslint-plugin-import": "^2.23.3",
+    "eslint-plugin-prettier": "^3.4.0",
+    "eslint-plugin-react": "^7.23.2",
+    "eslint-plugin-react-hooks": "^4.2.0",
     "gzipper": "^4.5.0",
-    "postcss": "^8.2.15",
+    "postcss": "^8.3.0",
     "postcss-cli": "^8.3.1",
     "prettier": "^2.3.0",
-    "snowpack": "^3.3.7",
+    "snowpack": "^3.5.1",
     "tailwindcss": "^2.1.2",
     "typescript": "^4.2.4"
   }

src/App.tsx

@@ -1,8 +1,12 @@
 import React from 'react';
 
+import type {
+  IBLEConnection,
+  IHTTPConnection,
+  ISerialConnection,
+} from '@meshtastic/meshtasticjs';
 import {
   Client,
-  IHTTPConnection,
   Protobuf,
   SettingsManager,
   Types,
@@ -36,33 +40,27 @@ export interface languageTemplate {
   no_message_placeholder: string;
 }
 
-const App = () => {
-  const [
-    deviceStatus,
-    setDeviceStatus,
-  ] = React.useState<Types.DeviceStatusEnum>(
-    Types.DeviceStatusEnum.DEVICE_DISCONNECTED,
-  );
+const App = (): JSX.Element => {
+  const [deviceStatus, setDeviceStatus] =
+    React.useState<Types.DeviceStatusEnum>(
+      Types.DeviceStatusEnum.DEVICE_DISCONNECTED,
+    );
   const [myNodeInfo, setMyNodeInfo] = React.useState<Protobuf.MyNodeInfo>(
     Protobuf.MyNodeInfo.create(),
   );
   const [channels, setChannels] = React.useState([] as Protobuf.Channel[]);
   const [nodes, setNodes] = React.useState<Types.NodeInfoPacket[]>([]);
-  const [connection, setConnection] = React.useState<IHTTPConnection>(
-    new IHTTPConnection(),
-  );
+  const [connection, setConnection] =
+    React.useState<ISerialConnection | IHTTPConnection | IBLEConnection>();
   const [isReady, setIsReady] = React.useState<boolean>(false);
-  const [
-    lastMeshInterraction,
-    setLastMeshInterraction,
-  ] = React.useState<number>(0);
+  const [lastMeshInterraction, setLastMeshInterraction] =
+    React.useState<number>(0);
 
   const [language, setLanguage] = React.useState<LanguageEnum>(
     LanguageEnum.ENGLISH,
   );
-  const [translations, setTranslations] = React.useState<languageTemplate>(
-    Translations_English,
-  );
+  const [translations, setTranslations] =
+    React.useState<languageTemplate>(Translations_English);
   const [darkmode, setDarkmode] = React.useState<boolean>(false);
 
   React.useEffect(() => {
@@ -97,8 +95,12 @@ const App = () => {
     });
     setConnection(connection);
     SettingsManager.debugMode = Protobuf.LogRecord_Level.TRACE;
+  }, []);
 
-    const deviceStatusEvent = connection.onDeviceStatusEvent.subscribe(
+  React.useEffect(() => {
+    console.log('UPDATING');
+
+    const deviceStatusEvent = connection?.onDeviceStatusEvent.subscribe(
       (status) => {
         setDeviceStatus(status);
         if (status === Types.DeviceStatusEnum.DEVICE_CONFIGURED) {
@@ -106,11 +108,10 @@ const App = () => {
         }
       },
     );
-    const myNodeInfoEvent = connection.onMyNodeInfoEvent.subscribe(
-      setMyNodeInfo,
-    );
+    const myNodeInfoEvent =
+      connection?.onMyNodeInfoEvent.subscribe(setMyNodeInfo);
 
-    const nodeInfoPacketEvent = connection.onNodeInfoPacketEvent.subscribe(
+    const nodeInfoPacketEvent = connection?.onNodeInfoPacketEvent.subscribe(
       (node) => {
         if (
           nodes.findIndex(
@@ -128,34 +129,34 @@ const App = () => {
       },
     );
 
-    const adminPacketEvent = connection.onAdminPacketEvent.subscribe(
+    const adminPacketEvent = connection?.onAdminPacketEvent.subscribe(
       (adminMessage) => {
         switch (adminMessage.data.variant.oneofKind) {
           case 'getChannelResponse':
             if (adminMessage.data.variant.getChannelResponse) {
-              let message = adminMessage.data.variant.getChannelResponse;
+              const message = adminMessage.data.variant.getChannelResponse;
               setChannels((channels) => [...channels, message]);
             }
-
+            break;
           default:
             break;
         }
       },
     );
 
-    const meshHeartbeat = connection.onMeshHeartbeat.subscribe(
+    const meshHeartbeat = connection?.onMeshHeartbeat.subscribe(
       setLastMeshInterraction,
     );
 
     return () => {
-      deviceStatusEvent.unsubscribe();
-      myNodeInfoEvent.unsubscribe();
-      nodeInfoPacketEvent.unsubscribe();
-      adminPacketEvent.unsubscribe();
-      meshHeartbeat.unsubscribe();
-      connection.disconnect();
+      deviceStatusEvent?.unsubscribe();
+      myNodeInfoEvent?.unsubscribe();
+      nodeInfoPacketEvent?.unsubscribe();
+      adminPacketEvent?.unsubscribe();
+      meshHeartbeat?.unsubscribe();
+      connection?.disconnect();
     };
-  }, []);
+  }, [connection, nodes]);
 
   return (
     <div className="flex flex-col h-screen w-screen">
@@ -163,6 +164,8 @@ const App = () => {
         status={deviceStatus}
         IsReady={isReady}
         LastMeshInterraction={lastMeshInterraction}
+        connection={connection}
+        setConnection={setConnection}
       />
       <Main
         isReady={isReady}

src/Main.tsx

@@ -1,7 +1,9 @@
 import React, { useState } from 'react';
 
 import type {
+  IBLEConnection,
   IHTTPConnection,
+  ISerialConnection,
   Protobuf,
   Types,
 } from '@meshtastic/meshtasticjs';
@@ -12,7 +14,7 @@ import MessageBox from './components/MessageBox';
 import Sidebar from './components/Sidebar';
 
 interface MainProps {
-  connection: IHTTPConnection;
+  connection?: ISerialConnection | IHTTPConnection | IBLEConnection;
   myNodeInfo: Protobuf.MyNodeInfo;
   nodes: Types.NodeInfoPacket[];
   channels: Protobuf.Channel[];
@@ -24,14 +26,14 @@ interface MainProps {
   setDarkmode: React.Dispatch<React.SetStateAction<boolean>>;
 }
 
-const Main = (props: MainProps) => {
+const Main = (props: MainProps): JSX.Element => {
   const [messages, setMessages] = React.useState<
     { message: Types.TextPacket; ack: boolean }[]
   >([]);
   const [sidebarOpen, setSidebarOpen] = useState<boolean>(false);
 
   React.useEffect(() => {
-    const textPacketEvent = props.connection.onTextPacketEvent.subscribe(
+    const textPacketEvent = props.connection?.onTextPacketEvent.subscribe(
       (message) => {
         setMessages((messages) => [
           ...messages,
@@ -39,11 +41,11 @@ const Main = (props: MainProps) => {
         ]);
       },
     );
-    return () => textPacketEvent.unsubscribe();
+    return () => textPacketEvent?.unsubscribe();
   }, [props.connection]);
 
   React.useEffect(() => {
-    const routingPacketEvent = props.connection.onRoutingPacketEvent.subscribe(
+    const routingPacketEvent = props.connection?.onRoutingPacketEvent.subscribe(
       (routingPacket) => {
         setMessages(
           messages.map((message) => {
@@ -60,7 +62,7 @@ const Main = (props: MainProps) => {
         );
       },
     );
-    return () => routingPacketEvent.unsubscribe();
+    return () => routingPacketEvent?.unsubscribe();
   }, [props.connection, messages]);
 
   return (

src/components/ChatMessage.tsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import React, { useState } from 'react';
 
 import {
   CheckCircleIcon,
@@ -13,7 +13,16 @@ interface ChatMessageProps {
   nodes: Types.NodeInfoPacket[];
 }
 
-const ChatMessage = (props: ChatMessageProps) => {
+const ChatMessage = (props: ChatMessageProps): JSX.Element => {
+  const [node, setNode] = useState<Types.NodeInfoPacket>();
+
+  React.useEffect(() => {
+    setNode(
+      props.nodes.find(
+        (node) => node.data.num === props.message.message.packet.from,
+      ),
+    );
+  }, [props.nodes, props.message]);
   return (
     <div className="flex items-end">
       <div
@@ -35,11 +44,7 @@ const ChatMessage = (props: ChatMessageProps) => {
         >
           <div className="flex text-xs text-gray-500 space-x-1">
             <div className="font-medium">
-              {/* {
-                props.nodes.find(
-                  (node) => node.data.num === props.message.message.packet.from,
-                ).data.user.longName
-              } */}
+              {node?.data.user?.longName ?? 'UNK'}
             </div>
             <p>-</p>
             <div className="underline">

src/components/Header.tsx

@@ -1,11 +1,19 @@
 import React from 'react';
 
 import {
+  ChipIcon,
   DeviceMobileIcon,
+  RssIcon,
   StatusOfflineIcon,
   StatusOnlineIcon,
+  WifiIcon,
 } from '@heroicons/react/outline';
-import { Types } from '@meshtastic/meshtasticjs';
+import {
+  IBLEConnection,
+  IHTTPConnection,
+  ISerialConnection,
+  Types,
+} from '@meshtastic/meshtasticjs';
 
 import Logo from './logo';
 
@@ -13,17 +21,75 @@ interface HeaderProps {
   status: Types.DeviceStatusEnum;
   IsReady: boolean;
   LastMeshInterraction: number;
+  connection?: IHTTPConnection | ISerialConnection | IBLEConnection;
+  setConnection: React.Dispatch<
+    React.SetStateAction<
+      IHTTPConnection | ISerialConnection | IBLEConnection | undefined
+    >
+  >;
 }
 
-const Header = (props: HeaderProps) => {
+const Header = (props: HeaderProps): JSX.Element => {
+  const [activeConnection, setActiveConnection] =
+    React.useState<'http' | 'serial' | 'ble'>('http');
   return (
     <nav className="w-full shadow-md">
       <div className="flex w-full container mx-auto justify-between px-6 py-4">
         <Logo />
         <div></div>
 
-        <div className="flex items-center">
-          <div className="flex pl-4">
+        <div className="flex space-x-2 items-center">
+          <button
+            className={`rounded-md px-3 py-2 ${
+              activeConnection === 'serial' ? 'bg-green-300' : 'bg-gray-300'
+            }`}
+            onClick={() => {
+              props.connection?.disconnect();
+              const connection = new ISerialConnection();
+              connection.connect({});
+              setActiveConnection('serial');
+              props.setConnection(connection);
+            }}
+          >
+            <ChipIcon className="m-auto h-5 w-5" />
+          </button>
+          <button
+            className={`rounded-md px-3 py-2 ${
+              activeConnection === 'http' ? 'bg-green-300' : 'bg-gray-300'
+            }`}
+            onClick={() => {
+              props.connection?.disconnect();
+              const connection = new IHTTPConnection();
+              connection.connect({
+                address:
+                  import.meta.env.NODE_ENV === 'production'
+                    ? window.location.hostname
+                    : import.meta.env.SNOWPACK_PUBLIC_DEVICE_IP,
+                receiveBatchRequests: false,
+                tls: false,
+                fetchInterval: 2000,
+              });
+              setActiveConnection('http');
+              props.setConnection(connection);
+            }}
+          >
+            <WifiIcon className="m-auto h-5 w-5" />
+          </button>
+          <button
+            className={`rounded-md px-3 py-2 ${
+              activeConnection === 'ble' ? 'bg-green-300' : 'bg-gray-300'
+            }`}
+            onClick={() => {
+              props.connection?.disconnect();
+              const connection = new IBLEConnection();
+              connection.connect({});
+              setActiveConnection('ble');
+              props.setConnection(connection);
+            }}
+          >
+            <RssIcon className="m-auto h-5 w-5" />
+          </button>
+          <div className="flex pl-2">
             <div
               className={`w-5 h-5 rounded-full ${
                 new Date(props.LastMeshInterraction) <
@@ -43,7 +109,7 @@ const Header = (props: HeaderProps) => {
             )}
           </div>
 
-          <div className="flex pl-4">
+          <div className="flex pl-2">
             <div
               className={`w-5 h-5 rounded-full ${
                 props.status <= Types.DeviceStatusEnum.DEVICE_DISCONNECTED

src/components/MessageBox.tsx

@@ -1,7 +1,11 @@
 import React from 'react';
 
 import { MenuIcon, PaperAirplaneIcon } from '@heroicons/react/outline';
-import type { IHTTPConnection } from '@meshtastic/meshtasticjs';
+import type {
+  IBLEConnection,
+  IHTTPConnection,
+  ISerialConnection,
+} from '@meshtastic/meshtasticjs';
 
 import type { languageTemplate } from '../App';
 
@@ -9,15 +13,15 @@ export interface MessageBoxProps {
   translations: languageTemplate;
   sidebarOpen: boolean;
   setSidebarOpen: React.Dispatch<React.SetStateAction<boolean>>;
-  connection: IHTTPConnection;
+  connection?: ISerialConnection | IHTTPConnection | IBLEConnection;
   isReady: boolean;
 }
 
-const MessageBox = (props: MessageBoxProps) => {
+const MessageBox = (props: MessageBoxProps): JSX.Element => {
   const [currentMessage, setCurrentMessage] = React.useState('');
   const sendMessage = () => {
     if (props.isReady) {
-      props.connection.sendText(currentMessage, undefined, true);
+      props.connection?.sendText(currentMessage, undefined, true);
       setCurrentMessage('');
     }
   };

src/components/Sidebar.tsx

@@ -1,7 +1,9 @@
 import React from 'react';
 
 import type {
+  IBLEConnection,
   IHTTPConnection,
+  ISerialConnection,
   Protobuf,
   Types,
 } from '@meshtastic/meshtasticjs';
@@ -16,7 +18,7 @@ interface SidebarProps {
   isReady: boolean;
   nodes: Types.NodeInfoPacket[];
   channels: Protobuf.Channel[];
-  connection: IHTTPConnection;
+  connection?: ISerialConnection | IHTTPConnection | IBLEConnection;
   language: LanguageEnum;
   setLanguage: React.Dispatch<React.SetStateAction<LanguageEnum>>;
   translations: languageTemplate;
@@ -26,7 +28,7 @@ interface SidebarProps {
   setDarkmode: React.Dispatch<React.SetStateAction<boolean>>;
 }
 
-const Sidebar = (props: SidebarProps) => {
+const Sidebar = (props: SidebarProps): JSX.Element => {
   return (
     <div
       className={`${

src/components/Sidebar/Channels/Channel.tsx

@@ -8,7 +8,7 @@ export interface ChannelProps {
   channel: Protobuf.Channel;
 }
 
-const Channel = (props: ChannelProps) => {
+const Channel = (props: ChannelProps): JSX.Element => {
   return (
     <Disclosure>
       {({ open }) => (

src/components/Sidebar/Channels/Index.tsx

@@ -17,7 +17,7 @@ export interface ChannelsProps {
   translations: languageTemplate;
 }
 
-const Channels = (props: ChannelsProps) => {
+const Channels = (props: ChannelsProps): JSX.Element => {
   return (
     <Disclosure>
       {({ open }) => (

src/components/Sidebar/Device/Index.tsx

@@ -6,18 +6,22 @@ import {
   ChevronDownIcon,
   ChevronRightIcon,
 } from '@heroicons/react/outline';
-import type { IHTTPConnection } from '@meshtastic/meshtasticjs';
+import type {
+  IBLEConnection,
+  IHTTPConnection,
+  ISerialConnection,
+} from '@meshtastic/meshtasticjs';
 
 import type { languageTemplate } from '../../../App';
 import Settings from './Settings';
 
 interface DeviceProps {
   isReady: boolean;
-  connection: IHTTPConnection;
+  connection?: ISerialConnection | IHTTPConnection | IBLEConnection;
   translations: languageTemplate;
 }
 
-const Device = (props: DeviceProps) => {
+const Device = (props: DeviceProps): JSX.Element => {
   return (
     <Disclosure>
       {({ open }) => (

src/components/Sidebar/Device/Settings.tsx

@@ -1,27 +1,27 @@
 import React from 'react';
 
-import { ObservableResource, useObservableSuspense } from 'observable-hooks';
 import { useForm } from 'react-hook-form';
 import JSONPretty from 'react-json-pretty';
-import type { languageTemplate } from 'src/App';
 
 import { SaveIcon } from '@heroicons/react/outline';
-import { IHTTPConnection, Protobuf } from '@meshtastic/meshtasticjs';
+import type {
+  IBLEConnection,
+  IHTTPConnection,
+  ISerialConnection,
+} from '@meshtastic/meshtasticjs';
+import { Protobuf } from '@meshtastic/meshtasticjs';
+
+import type { languageTemplate } from '../../../../src/App';
 
 export interface SettingsProps {
   isReady: boolean;
-  connection: IHTTPConnection;
+  connection?: ISerialConnection | IHTTPConnection | IBLEConnection;
   translations: languageTemplate;
 }
 
-const Settings = (props: SettingsProps) => {
+const Settings = (props: SettingsProps): JSX.Element => {
   React.useEffect(() => {
-    const a = useObservableSuspense(
-      new ObservableResource(
-        props.connection.onAdminPacketEvent.asObservable(),
-      ),
-    );
-    const adminPacketEvent = props.connection.onAdminPacketEvent.subscribe(
+    const adminPacketEvent = props.connection?.onAdminPacketEvent.subscribe(
       (adminMessage) => {
         switch (adminMessage.data.variant.oneofKind) {
           case 'getRadioResponse':
@@ -34,35 +34,23 @@ const Settings = (props: SettingsProps) => {
       },
     );
 
-    return () => adminPacketEvent.unsubscribe();
+    return () => adminPacketEvent?.unsubscribe();
   }, []);
 
-  const [
-    preferences,
-    setPreferences,
-  ] = React.useState<Protobuf.RadioConfig_UserPreferences>();
-  const {
-    register,
-    setValue,
-    handleSubmit,
-    formState: { errors },
-  } = useForm<Protobuf.RadioConfig_UserPreferences>({
-    defaultValues: preferences,
-  });
+  const [preferences, setPreferences] =
+    React.useState<Protobuf.RadioConfig_UserPreferences>();
+  const { register, handleSubmit } =
+    useForm<Protobuf.RadioConfig_UserPreferences>({
+      defaultValues: preferences,
+    });
 
   const onSubmit = handleSubmit((data) => console.log(data));
-
   return (
     <form onSubmit={onSubmit}>
       <div className="flex bg-gray-50 whitespace-nowrap p-3 justify-between border-b">
         <div className="my-auto">{props.translations.device_region_title}</div>
         <div className="flex shadow-md rounded-md ml-2">
-          <select
-            value={preferences.region ?? Protobuf.RegionCode.Unset}
-            // onChange={(e) => {
-            //   preferences.region = parseInt(e.target.value);
-            // }}
-          >
+          <select value={preferences?.region ?? Protobuf.RegionCode.Unset}>
             <option value={Protobuf.RegionCode.ANZ}>
               {Protobuf.RegionCode[Protobuf.RegionCode.ANZ]}
             </option>

src/components/Sidebar/Nodes/Index.tsx

@@ -18,7 +18,7 @@ interface NodesProps {
   myId: number;
 }
 
-const Nodes = (props: NodesProps) => {
+const Nodes = (props: NodesProps): JSX.Element => {
   return (
     <Disclosure>
       {({ open }) => (

src/components/Sidebar/Nodes/Node.tsx

@@ -17,7 +17,7 @@ export interface NodeProps {
   myId: number;
 }
 
-const Node = (props: NodeProps) => {
+const Node = (props: NodeProps): JSX.Element => {
   return (
     <Disclosure>
       {({ open }) => (

src/components/Sidebar/UI/Index.tsx

@@ -18,7 +18,7 @@ interface UIProps {
   setDarkmode: React.Dispatch<React.SetStateAction<boolean>>;
 }
 
-const UI = (props: UIProps) => {
+const UI = (props: UIProps): JSX.Element => {
   return (
     <Disclosure>
       {({ open }) => (

src/components/Sidebar/UI/Translations.tsx

@@ -5,7 +5,8 @@ import { Br, Jp, Us } from 'react-flags-select';
 import { Disclosure } from '@headlessui/react';
 import { ChevronDownIcon, ChevronRightIcon } from '@heroicons/react/outline';
 
-import { LanguageEnum, languageTemplate } from '../../../App';
+import type { languageTemplate } from '../../../App';
+import { LanguageEnum } from '../../../App';
 
 export interface TranslationsProps {
   language: LanguageEnum;
@@ -13,7 +14,7 @@ export interface TranslationsProps {
   translations: languageTemplate;
 }
 
-const Translations = (props: TranslationsProps) => {
+const Translations = (props: TranslationsProps): JSX.Element => {
   return (
     <Disclosure>
       {({ open }) => (

src/components/basic/ToggleSwitch.tsx

@@ -4,10 +4,9 @@ import { Switch } from '@headlessui/react';
 
 interface ToggleSwitchProps {
   active: boolean;
-  toggle?: Function;
 }
 
-const ToggleSwitch = (props: ToggleSwitchProps) => {
+const ToggleSwitch = (props: ToggleSwitchProps): JSX.Element => {
   const [active, setActive] = React.useState(false);
 
   React.useEffect(() => {

src/components/logo.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 
-const Logo = () => {
+const Logo = (): JSX.Element => {
   return (
     <svg
       height="30"

src/index.tsx

@@ -1,17 +1,25 @@
+/// <reference types="react/experimental" />
+/// <reference types="react-dom/experimental" />
+
+import './index.css';
+
 import React from 'react';
 import ReactDOM from 'react-dom';
+
 import App from './App';
-import './index.css';
 
-ReactDOM.render(
-  <React.StrictMode>
-    <App />
-  </React.StrictMode>,
-  document.getElementById('root'),
-);
+const element = document.getElementById('root');
+
+if (element) {
+  ReactDOM.createRoot(element).render(
+    <React.StrictMode>
+      <App />
+    </React.StrictMode>,
+  );
+}
 
 // Hot Module Replacement (HMR) - Remove this snippet to remove HMR.
-// Learn more: https://snowpack.dev/concepts/hot-module-replacement
+// Learn more: https://www.snowpack.dev/#hot-module-replacement
 if (import.meta.hot) {
   import.meta.hot.accept();
 }