在React中寻求浏览器权限

Question

  geoLocationOptions = {
    enableHighAccuracy: false,
    maximumAge: 0,
    timeout: 5000
  }
  
  constructor(props) {
    super(props);
    //this.currentLog = this.currentLog.bind(this);
    this.checkForGeolocation = this.checkForGeolocation.bind(this)
    this.seekGeolocationPermission = this.seekGeolocationPermission.bind(this)
  }

  checkForGeolocation () {
    if (navigator.geolocation) {
      this.setState({browserSupported: true})
      console.log('Your Browser is Supported!');
    } else {
      this.setState({browserSupported: false})
      alert("Your browser is not supported!")
    }

    return this.state.browserSupported
  }

  seekGeolocationPermission() {

    if (this.checkForGeolocation()) {
      navigator.geolocation.getCurrentPosition(function (position) {
        console.log('Latitude: ' + position.coords.latitude)
        console.log('Longitude: ' + position.coords.longitude)
        console.log('Accuracy: ' + position.coords.accuracy)
      }, function (error) {
        alert('There\'s an error: ' + error.message)
        console.log('The error: '+error.code)
      }, this.geoLocationOptions)
    } 
  }

  componentDidMount () {
    this.seekGeolocationPermission()
  }

  render() {
    return (
      <div className="permissions_app">
        <p>{this.state.browserSupported}</p>
      </div>
    );
  }

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>

这就是我写的。应该执行seekGeolocationPermission的第二部分吗？怎么了？

我应该使用componentDidMount（）还是update（）还是只在render（）内部运行它。