web/pages/_app.tsx

/**
 * Copyright 2021 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import DateFnsUtils from "@date-io/date-fns";
import { CssBaseline, Toolbar } from "@material-ui/core";
import { MuiPickersUtilsProvider } from "@material-ui/pickers";
import { AppProps } from "next/app";
import { useEffect } from "react";

import Header from "../components/Header";
import { usePageView } from "../hooks/usePageView";

const App: React.FC<AppProps> = ({ Component, pageProps }) => {
  usePageView();

  useEffect(() => {
    const jssStyles = document.querySelector("#jss-server-side");
    if (jssStyles && jssStyles.parentElement) {
      jssStyles.parentElement.removeChild(jssStyles);
    }
  }, []);

  return (
    <>
      <CssBaseline />
      <Header />
      <Toolbar />
      <MuiPickersUtilsProvider utils={DateFnsUtils}>
        <Component {...pageProps} />
      </MuiPickersUtilsProvider>
    </>
  );
};

export default App;