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  • 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;
    
    
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  • 原文地址:https://www.cnblogs.com/smart-girl/p/10796478.html
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