@slorber/react-google-maps/src/components/directions/DirectionsRenderer.md

React.js Google Maps API integration

# DirectionsRenderer and DirectionsService example

```jsx
const { Component } = require('react');
const { GoogleMap, LoadScript, DirectionsService } = require("../../");
const ScriptLoaded = require("../../docs/ScriptLoaded").default;

class Directions extends Component {
  constructor (props) {
    super(props)

    this.state = {
      response: null,
      travelMode: 'DRIVING',
      origin: '',
      destination: ''
    }

    this.directionsCallback = this.directionsCallback.bind(this)
    this.checkDriving = this.checkDriving.bind(this)
    this.checkBicycling = this.checkBicycling.bind(this)
    this.checkTransit = this.checkTransit.bind(this)
    this.checkWalking = this.checkWalking.bind(this)
    this.getOrigin = this.getOrigin.bind(this)
    this.getDestination = this.getDestination.bind(this)
    this.onClick = this.onClick.bind(this)
    this.onMapClick = this.onMapClick.bind(this)
  }

  directionsCallback (response) {
    console.log(response)

    if (response !== null) {
      if (response.status === 'OK') {
        this.setState(
          () => ({
            response
          })
        )
      } else {
        console.log('response: ', response)
      }
    }
  }

  checkDriving ({ target: { checked } }) {
    checked &&
      this.setState(
        () => ({
          travelMode: 'DRIVING'
        })
      )
  }

  checkBicycling ({ target: { checked } }) {
    checked &&
      this.setState(
        () => ({
          travelMode: 'BICYCLING'
        })
      )
  }

  checkTransit ({ target: { checked } }) {
    checked &&
      this.setState(
        () => ({
          travelMode: 'TRANSIT'
        })
      )
  }

  checkWalking ({ target: { checked } }) {
    checked &&
      this.setState(
        () => ({
          travelMode: 'WALKING'
        })
      )
  }

  getOrigin (ref) {
    this.origin = ref
  }

  getDestination (ref) {
    this.destination = ref
  }

  onClick () {
    if (this.origin.value !== '' && this.destination.value !== '') {
      this.setState(
        () => ({
          origin: this.origin.value,
          destination: this.destination.value
        })
      )
    }
  }

  onMapClick (...args) {
    console.log('onClick args: ', args)
  }

  render () {
    return (
      <div className='map'>
        <div className='map-settings'>
          <hr className='mt-0 mb-3' />

          <div className='row'>
            <div className='col-md-6 col-lg-4'>
              <div className='form-group'>
                <label htmlFor='ORIGIN'>Origin</label>
                <br />
                <input id='ORIGIN' className='form-control' type='text' ref={this.getOrigin} />
              </div>
            </div>

            <div className='col-md-6 col-lg-4'>
              <div className='form-group'>
                <label htmlFor='DESTINATION'>Destination</label>
                <br />
                <input id='DESTINATION' className='form-control' type='text' ref={this.getDestination} />
              </div>
            </div>
          </div>

          <div className='d-flex flex-wrap'>
            <div className='form-group custom-control custom-radio mr-4'>
              <input
                id='DRIVING'
                className='custom-control-input'
                name='travelMode'
                type='radio'
                checked={this.state.travelMode === 'DRIVING'}
                onChange={this.checkDriving}
              />
              <label className='custom-control-label' htmlFor='DRIVING'>Driving</label>
            </div>

            <div className='form-group custom-control custom-radio mr-4'>
              <input
                id='BICYCLING'
                className='custom-control-input'
                name='travelMode'
                type='radio'
                checked={this.state.travelMode === 'BICYCLING'}
                onChange={this.checkBicycling}
              />
              <label className='custom-control-label' htmlFor='BICYCLING'>Bicycling</label>
            </div>

            <div className='form-group custom-control custom-radio mr-4'>
              <input
                id='TRANSIT'
                className='custom-control-input'
                name='travelMode'
                type='radio'
                checked={this.state.travelMode === 'TRANSIT'}
                onChange={this.checkTransit}
              />
              <label className='custom-control-label' htmlFor='TRANSIT'>Transit</label>
            </div>

            <div className='form-group custom-control custom-radio mr-4'>
              <input
                id='WALKING'
                className='custom-control-input'
                name='travelMode'
                type='radio'
                checked={this.state.travelMode === 'WALKING'}
                onChange={this.checkWalking}
              />
              <label className='custom-control-label' htmlFor='WALKING'>Walking</label>
            </div>
          </div>

          <button className='btn btn-primary' type='button' onClick={this.onClick}>
            Build Route
          </button>
        </div>

        <div className='map-container'>
          <GoogleMap
            // required
            id='direction-example'
            // required
            mapContainerStyle={{
              height: '400px',
              width: '100%'
            }}
            // required
            zoom={2}
            // required
            center={{
              lat: 0,
              lng: -180
            }}
            // optional
            onClick={this.onMapClick}
            // optional
            onLoad={map => {
              console.log('DirectionsRenderer onLoad map: ', map)
            }}
            // optional
            onUnmount={map => {
              console.log('DirectionsRenderer onUnmount map: ', map)
            }}
          >
            {
              (
                this.state.destination !== '' &&
                this.state.origin !== ''
              ) && (
                <DirectionsService
                  // required
                  options={{ // eslint-disable-line react-perf/jsx-no-new-object-as-prop
                    destination: this.state.destination,
                    origin: this.state.origin,
                    travelMode: this.state.travelMode
                  }}
                  // required
                  callback={this.directionsCallback}
                  // optional
                  onLoad={directionsService => {
                    console.log('DirectionsService onLoad directionsService: ', directionsService)
                  }}
                  // optional
                  onUnmount={directionsService => {
                    console.log('DirectionsService onUnmount directionsService: ', directionsService)
                  }}
                />
              )
            }

            {
              this.state.response !== null && (
                <DirectionsRenderer
                  // required
                  options={{ // eslint-disable-line react-perf/jsx-no-new-object-as-prop
                    directions: this.state.response
                  }}
                  // optional
                  onLoad={directionsRenderer => {
                    console.log('DirectionsRenderer onLoad directionsRenderer: ', directionsRenderer)
                  }}
                  // optional
                  onUnmount={directionsRenderer => {
                    console.log('DirectionsRenderer onUnmount directionsRenderer: ', directionsRenderer)
                  }}
                />
              )
            }
          </GoogleMap>
        </div>
      </div>
    )
  }
}

<ScriptLoaded>
  <Directions />
</ScriptLoaded>
```