"未找到模块：无法解析“material-ui\/styles\/colors”"

Question

I have the following code, that does not compiled:

import React from 'react';
import { AppBar, Toolbar } from 'material-ui';
import { Typography } from 'material-ui';
import { MuiThemeProvider, createMuiTheme } from 'material-ui/styles';
import {cyan, red} from 'material-ui/colors';
import { red400 } from 'material-ui/styles/colors';


const theme = createMuiTheme({
  palette: {
    primary: red400,
    secondary: cyan, 
  },
});

const View = (props) => (
  <MuiThemeProvider theme={theme}>
    <AppBar position="static">
      <Toolbar>
      <Typography variant="title">
        {props.title}
      </Typography>          
      </Toolbar>
    </AppBar>
  </MuiThemeProvider>
);
export default View;

It says:

Failed to compile
./src/Dashboard/AppBar/Views/View.js
Module not found: Can't resolve 'material-ui/styles/colors' in '/home/developer/Desktop/react-reason/example/src/Dashboard/AppBar/Views'  

What am I doing wrong?

Answer 1

Moving the discussion in the comments here:

Make sure you install the next version of material-ui:

npm install material-ui@next

This import statement is incorrect:

import { red400 } from 'material-ui/styles/colors'

It needs to be like:

import red from 'material-ui/colors/red';

Here, red is what the docs call a 'color object'. You can then use it in to create your theme object like this:

const theme = createMuiTheme({
  palette: {
    primary: {
      main: red[500], //OR red['A400'] for the accent range
      contrastText: '#fff', // The text color to use
      // You can also specify light, dark variants to use (it's autocomputed otherwise)
    }
    //You can also just assign the color object if the defaults work for you
    secondary: red,
    error: red
    //tonalOffset
    //contrastThreshold

  },
});

In the above code, the keys primary secondary and error accept either a color object OR a 'palette intention' which is an object which looks like this:

interface PaletteIntention {
  light?: string;
  main: string;
  dark?: string;
  contrastText?: string;
};

The only required key there is main . The rest are auto computed from the value of main if it's not provided.

Reference:

The docs have a detail section on themes which explains all of this in detail .

Answer 2

试试这个

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

Answer 3

In my case i downloaded a template Material Dashboard Pro and was running npm install to install the dependencies but it was showing the same error so i fixed it with

npm install material-ui@next --force

by adding --force flag solved my issue. posting this because it may be helpful for someone.