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I am using material UI with Next.js. I am running onnpm run dev. My problem is that the styling on the site completely breaks whenever I press the reloading button on the browser. Is this normal behavior? Seems like Material-UI stops working.
Here is my code.
I have an index.js and a component.
index
import React, { Component } from 'react'
import CssBaseline from '@material-ui/core/CssBaseline';
import { MuiThemeProvider, createMuiTheme } from '@material-ui/core/styles';
import AppBar from '../components/NavBar/NavBar';
const theme = createMuiTheme({
palette: {
primary: {
main: '#f28411',
},
},
});
class App extends Component {
render() {
return (
<MuiThemeProvider theme={theme}>
<React.Fragment>
<CssBaseline />
<AppBar />
</React.Fragment>
</MuiThemeProvider>
)
}
}
export default App
component
import React, { Component } from 'react'
import PropTypes from 'prop-types';
import { withStyles } from '@material-ui/core/styles';
import AppBar from '@material-ui/core/AppBar'
import Toolbar from '@material-ui/core/Toolbar'
import Typography from '@material-ui/core/Typography'
class NavBar extends Component {
render() {
const { classes } = this.props;
return(
<div>
<AppBar position="static">
<Toolbar>
<Typography variant="title" color="inherit">
Test
</Typography>
</Toolbar>
</AppBar>
</div>
);
}
}
const styles = theme => ({
title: {
color: '#FFF',
},
});
NavBar.propTypes = {
classes: PropTypes.object.isRequired,
};
export default withStyles(styles)(NavBar);
407
I had this same issue but was not using styled-components so the above answer did not apply, so I thought I would post in case this helps anyone else. To fix this, I just had to add the _document.js file under the pages/ directory included in the material-ui sample:
import React from 'react'
import Document, { Html, Head, Main, NextScript } from 'next/document'
import { ServerStyleSheets } from '@material-ui/core/styles'
import theme from '../shared/utils/theme'
export default class MyDocument extends Document {
render() {
return (
<Html lang='en'>
<Head>
<meta name='theme-color' content={theme.palette.primary.main} />
<link
rel='stylesheet'
href='https://fonts.googleapis.com/css?family=Roboto:300,400,500,700&display=swap'
/>
</Head>
<body>
<Main />
<NextScript />
</body>
</Html>
)
}
}
MyDocument.getInitialProps = async (ctx) => {
const sheets = new ServerStyleSheets()
const originalRenderPage = ctx.renderPage
ctx.renderPage = () =>
originalRenderPage({
enhanceApp: (App) => (props) => sheets.collect(<App {...props} />),
})
const initialProps = await Document.getInitialProps(ctx)
return {
...initialProps,
styles: [
...React.Children.toArray(initialProps.styles),
sheets.getStyleElement(),
],
}
}
It could be possible that you need a babel plugin for this.
In your package, add
npm install --save-dev babel-plugin-styled-components
In your .babelrc, add
{
"plugins": [
[ "styled-components", { "ssr": true, "displayName": true, "preprocess": false } ]
]
}
Let me know if this works.
23
As it turns out, you cannot use all of the third-party libraries for Next JS in the same way as you would use for React apps. You need to modify your pages/_document.js and pages/_app.js. Also, you will need theme.js for configuring Material UI colors and other default styles. You can include theme.js to any folder, in my case it is in helpers folder.
_app.js
import React from "react";
import App from "next/app";
import theme from '../helpers/theme'; // needed for Material UI
import CssBaseline from '@material-ui/core/CssBaseline';
import {ThemeProvider} from '@material-ui/core/styles';
class MyApp extends App {
static async getInitialProps({Component, ctx}) {
const pageProps = Component.getInitialProps ? await Component.getInitialProps(ctx) : {};
//Anything returned here can be accessed by the client
return {pageProps: pageProps};
}
render() {
const {Component, pageProps, router} = this.props;
return (
<ThemeProvider theme={theme}>
<CssBaseline />
{/* default by next js */}
<Component {...pageProps}/>
</ThemeProvider>
)
}
}
export default MyApp
_document.js
import Document, {Html, Head, Main, NextScript} from "next/document";
import theme from '../helpers/theme';
import { ServerStyleSheets } from '@material-ui/core/styles';
import React from "react";
export default class MyDocument extends Document {
static async getInitialProps(ctx) {
const initialProps = await Document.getInitialProps(ctx);
let props = {...initialProps};
return props;
}
render() {
return (
<Html>
<Head>
<meta name="theme-color" content={theme.palette.primary.main} />
</Head>
<body>
<Main/>
<NextScript/>
</body>
</Html>
);
}
}
MyDocument.getInitialProps = async (ctx) => {
const sheets = new ServerStyleSheets();
const originalRenderPage = ctx.renderPage;
ctx.renderPage = () =>
originalRenderPage({
enhanceApp: (App) => (props) => sheets.collect(<App {...props} />),
});
const initialProps = await Document.getInitialProps(ctx);
return {
...initialProps,
// Styles fragment is rendered after the app and register rendering finish.
styles: [...React.Children.toArray(initialProps.styles), sheets.getStyleElement()],
};
};
theme.js
import { createMuiTheme } from '@material-ui/core/styles';
import { red } from '@material-ui/core/colors';
// Create a theme instance.
const theme = createMuiTheme({
palette: {
primary: {
main: '#FFF212',
},
secondary: {
main: '#FFF212',
},
error: {
main: red.A400,
},
background: {
default: '#fff',
},
},
});
export default theme;
There is an amazing repository in Github https://github.com/vercel/next.js/tree/canary/examples There you can find a list of libraries with the correct way of using them in Next JS apps.
For your case here is the link: https://github.com/vercel/next.js/tree/canary/examples/with-material-ui.
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