react-native-background-timer, null is not an object - reactjs

Question

I've got an error using react-native-background-timer. I would be appreciate it if you could help me solve this problem.
I'm developing a mobile app on Expo Snack, and I now want to realize the auto-delete-account function: when an account is created and not being verified for 5 minutes, it will be deleted automatically.
So, I searched about background timer and I found the library below.
https://github.com/ocetnik/react-native-background-timer
However, I wasn't able to achieve it because of the error below
(3:2693) null is not an object (evaluating 'o.setTimeout')
and this is my code
import React, { Component } from 'react';
import { View, Text, TouchableOpacity, Platform } from 'react-native';
import BackgroundTimer from 'react-native-background-timer';
let counter = 0;
let timer = null;
export default class App extends Component {
constructor(props) {
super(props);
this.state = {
second: 0,
};
}
_interval: any;
onStart = () => {
if (Platform.OS == 'ios') {
BackgroundTimer.start();
}
this._interval = BackgroundTimer.setInterval(() => {
this.setState({
second: this.state.second + 1,
});
}, 1000);
};
onPause = () => {
BackgroundTimer.clearInterval(this._interval);
};
onReset = () => {
this.setState({
second: 0,
});
BackgroundTimer.clearInterval(this._interval);
};
render() {
return (
<View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
<TouchableOpacity onPress={this.onStart}>
<Text>start</Text>
</TouchableOpacity>
<TouchableOpacity onPress={this.onPause}>
<Text>pause</Text>
</TouchableOpacity>
<TouchableOpacity onPress={this.onReset}>
<Text>reset</Text>
</TouchableOpacity>
<Text>{this.state.second}</Text>
</View>
);
}
}
I followed a tutorial of this guy
https://medium.com/#loons.create/how-to-setup-react-native-background-timer-22263d655847
The equipped function, setInterval of javascript and etc. of course works fine as a timer, but actually they don't work behind in react native.
What am I missing, or is this an issue inside this library( I suppose so )? If so, please tell me an available version of this library; I use the latest version, 2.2.0, and React v35.0.0
Thank you

Answer 1

You cannot use "react-native-background-timer" with Expo on managed workflow. This library needs to compile some native code.
Instead, you should take a took to Expo BackgroundFetch which is doing almost the same thing.
https://docs.expo.io/versions/latest/sdk/background-fetch/
Using Expo components, you don't need to eject or compile additional native code.