fetch.js

import React, { PureComponent } from 'react';

class App extends PureComponent {
  componentWillMount() {
    const url = 'api.openweathermap.org/data/2.5/weather?q=München,DE&appid=382aa7ad3501c6d4a564022372982343';

    fetch(url).then((res) => {

      if (res.status !== 200) {
        console.log('Looks like there was a problem. Status Code: ' + res.status);
        return;
      }
      
      
      
      
      console.log(res)
      
    }).catch((err) => {
      console.log('Fetch Error :-S', err);
    })
  }
  render() {
    return (
      <div className="app" />
    );
  }
}

export default App;