example.js

 import pole from 'pole'
 
 this.setState({
   pollLocation: pole({interval: 
                      LOCATION_POLL_FREQUENCY}, (
                      callback) => {
     let now =  new Date()
     let data = JSON.stringify({'lat': 20, 
                'long': 20, 'time': now })
     fetch('http://localhost:8080', {
       method: 'POST',
       headers: {
         'Accept': 'application/json',
         'Content-Type': 'application/json',
       },
       body: data
     })
     this.updateTime(now)
     callback()
   })
 }) Copy-paste code here to remove the line numbers.