TypeError: Cannot read property 'block' of undefined

[artemarta]

Everything has been done according to official docs.
But I've got an error.
I think it's because in https://github.com/trufflesuite/drizzle-react/blob/master/src/DrizzleProvider.js on line 29 there is no check whether web3 property exists on options object.

I have the following code:

import Token from './contracts/StandardToken.json';

export const drizzleOptions = {
    contracts: [Token],
};

import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import { DrizzleProvider } from 'drizzle-react';
import { initializeIcons } from '@uifabric/icons';
import { Fabric } from 'office-ui-fabric-react/lib/Fabric';
import { store } from './store';
import { AppRouter } from './router';
import { unregister as unregisterServiceWorker } from './registerServiceWorker';
import { drizzleOptions } from './drizzleOptions';

import './index.css';

initializeIcons();

const withProvider = WrappedComponent => (
    <Fabric>
        <DrizzleProvider options={drizzleOptions}>
            <Provider store={store}>
                <WrappedComponent />
            </Provider>
        </DrizzleProvider>
    </Fabric>
);

ReactDOM.render(withProvider(AppRouter), document.getElementById('root'));
unregisterServiceWorker();

[sliptype]

Same issue here, got it working thanks to @artemarta by adding web3.block to my options:

web3: {
    block: false
}

I'm not sure what the use-case is for block and I couldn't find anything in the docs about it, but I'm thinking web3 should be null checked

[wangki]

@sklingler93 That doesn't work for me. My option
web3: { block: false, fallback: { type: "ws", url: "ws://127.0.0.1:7545" } }

[wangki]

add polls: {}, works perfect. what happened here?

Refer to : trufflesuite/drizzle#32

[OnlyOneJMJQ]

This is caused by a combination of things that have now been patched:

• The options checks were assuming some key existence, now drizzle comes with sensible default options as of release v1.1.4.
• The block options this is checking for was vestigial and should have been removed, it now is as of drizzle-react release v1.1.1.