jasbir23 / reactivewars Goto Github PK

Hi,

I'm trying to run your demo application, but there are warnings and errors.

1. The warnings:

Compiled with warnings.

./src/components/ReactiveWars.js
Line 47: Expected to return a value in arrow function array-callback-return
Line 56: Expected to return a value in arrow function array-callback-return
Line 57: Expected a default case default-case
Line 84: Do not mutate state directly. Use setState() react/no-direct-mutation-state

2. The errors:

TypeError: Cannot read property 'pref' of undefined
SafeSubscriber._next
C:/Users/User/Downloads/ReactiveWars-master/ReactiveWars-master/src/components/ReactiveWars.js:137
134 | )
135 | .subscribe(val => {
136 | this.setState({

137 | data: {
138 | ...this.state.data,
139 | [val.value.pref]: {
140 | count: val.value.res.count,

How can I fix it?