excalidraw/src/index.tsx

import React from "react";
import ReactDOM from "react-dom";
import * as Sentry from "@sentry/browser";
import * as SentryIntegrations from "@sentry/integrations";

import { EVENT } from "./constants";
import { TopErrorBoundary } from "./components/TopErrorBoundary";
import { IsMobileProvider } from "./is-mobile";
import App from "./components/App";
import { register as registerServiceWorker } from "./serviceWorker";

import "./css/styles.scss";

// On Apple mobile devices add the proprietary app icon and splashscreen markup.
// No one should have to do this manually, and eventually this annoyance will
// go away once https://bugs.webkit.org/show_bug.cgi?id=183937 is fixed.
if (
  /\b(iPad|iPhone|iPod)\b/.test(navigator.userAgent) &&
  !matchMedia("(display-mode: standalone)").matches
) {
  import(/* webpackChunkName: "pwacompat" */ "pwacompat");
}

const SentryEnvHostnameMap: { [key: string]: string } = {
  "excalidraw.com": "production",
  "now.sh": "staging",
};

const onlineEnv = Object.keys(SentryEnvHostnameMap).find(
  (item) => window.location.hostname.indexOf(item) >= 0,
);

Sentry.init({
  // Disable Sentry locally to avoid noise
  dsn: onlineEnv
    ? "https://7bfc596a5bf945eda6b660d3015a5460@sentry.io/5179260"
    : undefined,
  environment: onlineEnv ? SentryEnvHostnameMap[onlineEnv] : undefined,
  release: process.env.REACT_APP_GIT_SHA,
  ignoreErrors: [
    "undefined is not an object (evaluating 'window.__pad.performLoop')", // Only happens on Safari, but spams our servers. Doesn't break anything
  ],
  integrations: [
    new SentryIntegrations.CaptureConsole({
      levels: ["error"],
    }),
  ],
});

// Block pinch-zooming on iOS outside of the content area
document.addEventListener(
  "touchmove",
  (event) => {
    // @ts-ignore
    if (event.scale !== 1) {
      event.preventDefault();
    }
  },
  { passive: false },
);

const rootElement = document.getElementById("root");

ReactDOM.render(
  <TopErrorBoundary>
    <IsMobileProvider>
      <App />
    </IsMobileProvider>
  </TopErrorBoundary>,
  rootElement,
);

registerServiceWorker({
  onUpdate: (registration) => {
    const waitingServiceWorker = registration.waiting;
    if (waitingServiceWorker) {
      waitingServiceWorker.addEventListener(
        EVENT.STATE_CHANGE,
        (event: Event) => {
          const target = event.target as ServiceWorker;
          const state = target.state as ServiceWorkerState;
          if (state === "activated") {
            window.location.reload();
          }
        },
      );
      waitingServiceWorker.postMessage({ type: "SKIP_WAITING" });
    }
  },
});