I cannot use material-ui components after update to material-ui@0.15.0-beta.1

Question

I got this message in my console:

Failed Context Types: Required context muiTheme was not specified in AppBar

AppBar.js:158 Uncaught TypeError: Cannot read property 'prepareStyles' of undefined

I just have an AppBar in my Component I think it should work but... here my very simple code:

import React from 'react';
import {AppBar} from 'material-ui';


    export class MyComponent extends React.Component {

        render() {
            return (
                <div>
                    <AppBar
                        title="Title"
                    />

                </div>
            );
        }

    }

thanks for helping...

Answer 1

With material-ui@0.15.0.beta-1 a few things were changed.

You can have a look on the link below for more details. https://github.com/callemall/material-ui/blob/master/CHANGELOG.md

Therefore with those changes your code becomes:

    import React from 'react';
    import AppBar from 'material-ui/AppBar';
    import baseTheme from 'material-ui/styles/baseThemes/lightBaseTheme';
    import getMuiTheme from 'material-ui/styles/getMuiTheme';

        export class MyComponent extends React.Component {

            getChildContext() {
                return { muiTheme: getMuiTheme(baseTheme) };
            }

            render() {
                return (
                    <div>
                        <AppBar
                            title="Title"
                        />

                    </div>
                );
            }        
        }

        MyComponent.childContextTypes = {
            muiTheme: React.PropTypes.object.isRequired,
        };

Answer 2

now in the 0.15.0 you can use muiThemeProvider:

...

import getMuiTheme from 'material-ui/styles/getMuiTheme';
import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider';
import MyAwesomeReactComponent from './MyAwesomeReactComponent';

const App = () => (
 <MuiThemeProvider muiTheme={getMuiTheme()}>
    <MyAwesomeReactComponent />
 </MuiThemeProvider>
)

...

So you do not have to provide context to childrens manualy. More info in documentation.

Answer 3

Import MuiThemeProvider and then wrap the material-ui component AppBar with MuiThemeProvider.

import React, { Component } from 'react';
import AppBar from 'material-ui/AppBar';
import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider';
import './App.css';

class App extends Component {

  render() {

    return ( 
      <MuiThemeProvider>
        <div>
          <AppBar title = "Title" />
        </div> 
      </MuiThemeProvider>
    );
  }
}

export default App;