What is the best way to ensure that a React app is always displayed in full screen

I am facing an issue while developing an app with React and Material UI. I am trying to display the app in full-page mode, but unable to achieve it successfully. Currently, it appears like this: https://i.sstatic.net/Hg0CA.png

Here is my code snippet from App.js:

import 'typeface-roboto';
import './css/App.css'
import React from 'react';
import ArticlePage from "./pages/article";
import ProfilePage from "./pages/profile";
import {MuiThemeProvider} from "material-ui";
import CssBaseline from "@material-ui/core/CssBaseline";
import {BrowserRouter as Router, Switch, Route} from "react-router-dom";
import NavBar from "./components/NavBar";
import HomePage from "./pages/home";
import InboxPage from "./pages/inbox";

function App() {
    return (
        <MuiThemeProvider>
            <div className="App">
                <Router>
                    <CssBaseline/>
                    <NavBar/>
                    <Switch>
                        <Route path="/profile">
                            <ProfilePage profileName={"Denis Ivanenko"} dateTime={"2017-02-14"}
                                         userBio={"Example of User Bio. Here User can write about himself."}/>
                        </Route>
                        <Route path="/article">
                            <ArticlePage
                                imageSrc={"https://insights.dice.com/wp-content/uploads/2017/09/shutterstock_315465929.jpg"}
                                text={"...content goes here..."}
                                authorImageSrc={"...image source here..."}
                                ...more props...
                            />
                        </Route>
                        <Route path="/inbox">
                            <InboxPage name={"Denis"} surname={"Ivanenko"}
                                       messages={[{...message object 1...},
                                                 {...message object 2...}, 
                                                 {...message object 3...}]}/>
                        </Route>
                        <Route path="/">
                            <HomePage/>
                        </Route>
                    </Switch>
                </Router>
            </div>


        </MuiThemeProvider>
    );
}

export default App;

The stylesheets used are defined in App.css:

.App {
    background: #485563;
    background: -webkit-linear-gradient(to right, #29323c, #485563);
    background: linear-gradient(to right, #29323c, #485563);
    height: 100%;
    margin: 0;
    padding: 0;
}

P.S. As I'm new to front-end development, please excuse me if this question seems basic. I suspect there might be an issue with setting the background color. Can anyone assist me with this? Since I am using React router in my app, below is the code for a specific page:
Inbox.js :

import React from "react";
import Paper from "@material-ui/core/Paper";
import Container from "@material-ui/core/Container";
import '../css/Inbox.css';
import {Divider} from "@material-ui/core";
import AvatarImage from "../components/AvatarImage";


export default class InboxPage extends React.Component {
    render() {
        const name = this.props.name;
        const surname = this.props.surname;
        const messages = this.props.messages;
        return (
            <Container>
                <Paper>
                    <h1 className={"inboxHeader"}>{name}{" " + surname + "`s"} Inbox:</h1>
                    <Divider/>
                    {messages.map((message) =>
                        <Container>
                            <AvatarImage className={"AvatarImage"}/>
                            <h2>{message.author}:</h2>
                            <p>{message.text}</p>
                            <Divider/>
                        </Container>
                    )}
                </Paper>
            </Container>
        );
    }
}

Inbox.css :

.inboxHeader {
    text-align: center;
}

h2, p, img {
    display: inline-block;
}
.AvatarImage{
    display: inline-block;
}
.flexbox {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
}

Answer №1

Did you give this a shot?

.App {
  margin: 0;
  padding: 0;
  min-height: 100% //or 100vh
}

Answer №2

To enhance your style sheet (App.css), include the following code at the beginning.

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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