Adding an extra element to the <MuiThemeProvider /> causes the page to display as blank with no error notifications

After incorporating Material UI into my Meteor application via npm install --save material ui

I successfully implemented the <Header /> component in my app.js file. However, when I try to add additional components, such as localhost:3000, all I see is a blank page. Here is the code snippet:

header.js

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

class Header extends Component {
  render() {
    return(
      <AppBar
        title="Header"
        titleStyle={{textAlign: "center"}}
        showMenuIconButton={false}
      /> 
   );
  }
}

export default Header;

app.js

import React from 'react';
import ReactDOM from 'react-dom';
import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider';

import Header from './components/header'; 
import NewPost from './components/new_post';

const App = () => {
  return (
    <MuiThemeProvider>
      <Header />
    </MuiThemeProvider>
  );  
};

Meteor.startup(() => {
  ReactDOM.render(<App />, document.querySelector('.render-target'));
});

The above code works well (refer to the screenshot here) https://i.sstatic.net/jFOtM.png

However, upon adding another component, the screen turns blank

header.js remains unchanged

new_post.js

import React, { Component } from 'react';
import TextField from 'material-ui/TextField';

class NewPost extends Component {
  render() {
    return (
      <TextField
      hintText="Full width"
      fullWidth={true}
      />
    );
  }
}

export default NewPost;

app.js

import React from 'react';
import ReactDOM from 'react-dom';
import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider';

import Header from './components/header'; 
import NewPost from './components/new_post';

const App = () => {
  return (
    <MuiThemeProvider>
      <Header />
      <NewPost />
    </MuiThemeProvider>
  );  
};

Meteor.startup(() => {
  ReactDOM.render(<App />, document.querySelector('.render-target'));
});

The outcome is simply a blank screen

Why does integrating one more component (<NewPost />) within <MuiThemeProvider> lead to a blank screen? I consulted the material-ui documentation and sample projects but found that their application structure differs from mine. Any guidance or suggestions on this issue? Feel free to ask for further details if needed for better clarity.

Answer №1

It may seem strange, but I was able to make it function by simply including a <div>

app.js

const App = () => {
  return (
    <MuiThemeProvider muiTheme={getMuiTheme()}>
      <div>
        <Header />
        <NewPost />
      </div>
    </MuiThemeProvider>
  );  
}
Meteor.startup(() => {
  ReactDOM.render(<App />, document.querySelector('.render-target'));
});

https://i.sstatic.net/tY7N5.png

I would really appreciate if someone could clarify why the addition of a div resolves this issue. Thank you!

Answer №2

I am curious as to why the addition of a div element is what resolves all issues

Upon closer inspection of the browser warning message, which states, "Invalid prop children of type array supplied to MuiThemeProvider, expected a single ReactElement.".

By adding a <div/> around your components, it effectively groups them and transforms them into one cohesive react element.

Answer №3

If MuiThemeProvider is rendering as null, you will need to encapsulate the children in another element such as React.Fragment

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