Where to put theme file when using the gatsby-plugin-material-ui with gatsby?

问题

I can't seem to get my theme file to have any effect on my components in a Gatsby app. I'm using gatsby-plugin-material-ui

relevant part of gatsby-config.js

 `gatsby-plugin-netlify-cms`,
    {
      resolve: `gatsby-plugin-material-ui`,
      options: {
        pathToTheme: 'src/theme.js',
      },

theme.js

import { createMuiTheme } from '@material-ui/core/styles';

import indigo from '@material-ui/core/colors/indigo';
import pink from '@material-ui/core/colors/pink';
import red from '@material-ui/core/colors/red';

const theme = createMuiTheme({
  palette: {
    primary: indigo,
    secondary: pink,
    error: red,
  },
  spacing: {
      100
  }
})


export default theme;

within the component:

imports...
import { withStyles } from '@material-ui/core/styles';

const styles = theme => ({
  heroText: {
    color:'white',
    textAlign: 'center',
    lineHeight:7
  },
  mainBlogCopy: {
    marginTop: theme.spacing.unit,
    backgroundColor:theme.palette.primary
  },
});

export default withStyles(styles)(AboutPage);

package.json

 "dependencies": {
    "@material-ui/core": "^3.9.3",
    "gatsby": "^2.3.24",
    "gatsby-image": "^2.0.34",
    "gatsby-plugin-manifest": "^2.0.24",
    "gatsby-plugin-material-ui": "^1.2.4",

more...

How does one use a theme in another file with this plugin?

回答1:

Create a file maybe named mui-root-wrapper.js at your root directory

// mui-root-wrapper.js

import React from 'react'
import { ThemeProvider } from '@material-ui/core/styles'
import theme from './src/theme.js'

export default ({ element }) => (
  <ThemeProvider theme={theme}>
    {element}
  </ThemeProvider>
)

Then import this component to both gatsby-browser.js and gatsby-ssr.js:

// gatsby-browser.js, gatsby-ssr.js

import muiRootWrapper from "./mui-root-wrapper"
export const wrapRootElement = muiRootWrapper

来源：https://stackoverflow.com/questions/55821752/where-to-put-theme-file-when-using-the-gatsby-plugin-material-ui-with-gatsby

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