material(一)

项目目录如下



逻辑代码

import React from 'react';
import PropTypes from 'prop-types';
import Button from '@material-ui/core/Button';
import Dialog from '@material-ui/core/Dialog';
import DialogTitle from '@material-ui/core/DialogTitle';
import DialogContent from '@material-ui/core/DialogContent';
import DialogContentText from '@material-ui/core/DialogContentText';
import DialogActions from '@material-ui/core/DialogActions';
import Typography from '@material-ui/core/Typography';
import { withStyles } from '@material-ui/core/styles';
import withRoot from '../withRoot';

const styles = theme => ({
  root: {
    textAlign: 'center',
    paddingTop: theme.spacing.unit * 20,
  },
});

class Index extends React.Component {
  state = {
    open: false,
  };

  handleClose = () => {
    this.setState({
      open: false,
    });
  };

  handleClick = () => {
    this.setState({
      open: true,
    });
  };

  render() {
    const { classes } = this.props;
    const { open } = this.state;

    return (
      <div className={classes.root}>
        <Dialog open={open} onClose={this.handleClose}>
          <DialogTitle>Super Secret Password</DialogTitle>
          <DialogContent>
            <DialogContentText>1-2-3-4-5</DialogContentText>
          </DialogContent>
          <DialogActions>
            <Button color="primary" onClick={this.handleClose}>
              OK
            </Button>
          </DialogActions>
        </Dialog>
        <Typography variant="h4" gutterBottom>
          Material-UI
        </Typography>
        <Typography variant="subtitle1" gutterBottom>
          example project
        </Typography>
        <Button variant="contained" color="secondary" onClick={this.handleClick}>
          Super Secret Password
        </Button>
      </div>
    );
  }
}

Index.propTypes = {
  classes: PropTypes.object.isRequired,
};
// 这些是什么
export default withRoot(withStyles(styles)(Index));

index.js

//serviceWorker.js
import React from 'react';
import ReactDOM from 'react-dom';
import Index from './pages/index';
import * as serviceWorker from './serviceWorker';
// 直接render的是index
ReactDOM.render(<Index />, document.querySelector('#root'));

// If you want your app to work offline and load faster, you can change
// unregister() to register() below. Note this comes with some pitfalls.
// Learn more about service workers: http://bit.ly/CRA-PWA
serviceWorker.unregister();

// This optional code is used to register a service worker.
// register() is not called by default.

// This lets the app load faster on subsequent visits in production, and gives
// it offline capabilities. However, it also means that developers (and users)
// will only see deployed updates on subsequent visits to a page, after all the
// existing tabs open on the page have been closed, since previously cached
// resources are updated in the background.

// To learn more about the benefits of this model and instructions on how to
// opt-in, read http://bit.ly/CRA-PWA

const isLocalhost = Boolean(
  window.location.hostname === 'localhost' ||
    // [::1] is the IPv6 localhost address.
    window.location.hostname === '[::1]' ||
    // 127.0.0.1/8 is considered localhost for IPv4.
    window.location.hostname.match(/^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/),
);

export function register(config) {
  if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
    // The URL constructor is available in all browsers that support SW.
    const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
    if (publicUrl.origin !== window.location.origin) {
      // Our service worker won't work if PUBLIC_URL is on a different origin
      // from what our page is served on. This might happen if a CDN is used to
      // serve assets; see https://github.com/facebook/create-react-app/issues/2374
      return;
    }

    window.addEventListener('load', () => {
      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;

      if (isLocalhost) {
        // This is running on localhost. Let's check if a service worker still exists or not.
        checkValidServiceWorker(swUrl, config);

        // Add some additional logging to localhost, pointing developers to the
        // service worker/PWA documentation.
        navigator.serviceWorker.ready.then(() => {
          console.log(
            'This web app is being served cache-first by a service ' +
              'worker. To learn more, visit http://bit.ly/CRA-PWA',
          );
        });
      } else {
        // Is not localhost. Just register service worker
        registerValidSW(swUrl, config);
      }
    });
  }
}

function registerValidSW(swUrl, config) {
  navigator.serviceWorker
    .register(swUrl)
    .then(registration => {
      registration.onupdatefound = () => {
        const installingWorker = registration.installing;
        if (installingWorker == null) {
          return;
        }
        installingWorker.onstatechange = () => {
          if (installingWorker.state === 'installed') {
            if (navigator.serviceWorker.controller) {
              // At this point, the updated precached content has been fetched,
              // but the previous service worker will still serve the older
              // content until all client tabs are closed.
              console.log(
                'New content is available and will be used when all ' +
                  'tabs for this page are closed. See http://bit.ly/CRA-PWA.',
              );

              // Execute callback
              if (config && config.onUpdate) {
                config.onUpdate(registration);
              }
            } else {
              // At this point, everything has been precached.
              // It's the perfect time to display a
              // "Content is cached for offline use." message.
              console.log('Content is cached for offline use.');

              // Execute callback
              if (config && config.onSuccess) {
                config.onSuccess(registration);
              }
            }
          }
        };
      };
    })
    .catch(error => {
      console.error('Error during service worker registration:', error);
    });
}

function checkValidServiceWorker(swUrl, config) {
  // Check if the service worker can be found. If it can't reload the page.
  fetch(swUrl)
    .then(response => {
      // Ensure service worker exists, and that we really are getting a JS file.
      const contentType = response.headers.get('content-type');
      if (
        response.status === 404 ||
        (contentType != null && contentType.indexOf('javascript') === -1)
      ) {
        // No service worker found. Probably a different app. Reload the page.
        navigator.serviceWorker.ready.then(registration => {
          registration.unregister().then(() => {
            window.location.reload();
          });
        });
      } else {
        // Service worker found. Proceed as normal.
        registerValidSW(swUrl, config);
      }
    })
    .catch(() => {
      console.log('No internet connection found. App is running in offline mode.');
    });
}

export function unregister() {
  if ('serviceWorker' in navigator) {
    navigator.serviceWorker.ready.then(registration => {
      registration.unregister();
    });
  }
}

//withRoot.js
import React from 'react';
import { MuiThemeProvider, createMuiTheme } from '@material-ui/core/styles';
import purple from '@material-ui/core/colors/purple';
import green from '@material-ui/core/colors/green';
import CssBaseline from '@material-ui/core/CssBaseline';

// A theme with custom primary and secondary color.
// It's optional.
const theme = createMuiTheme({
  palette: {
    primary: {
      light: purple[300],
      main: purple[500],
      dark: purple[700],
    },
    secondary: {
      light: green[300],
      main: green[500],
      dark: green[700],
    },
  },
  typography: {
    useNextVariants: true,
  },
});
// 类似于app
function withRoot(Component) {
  function WithRoot(props) {
    return (
      <MuiThemeProvider theme={theme}>
        {/* CssBaseline kickstart an elegant, consistent, and simple baseline to build upon. */}
        <CssBaseline />
        <Component {...props} />
      </MuiThemeProvider>
    );
  }

  return WithRoot;
}

export default withRoot;