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jessicabetts

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React Google Maps How to use the Google Maps API with React.js

hello-class

While trying to implement the google maps API in a personal react.js project I came across a couple of examples that I found to be very complicated and confusing. So here is a brief and simple example of how I used Google Maps in my app!

First, things first!

Go to the Google maps API page, sign-up and get a token to use! You must enter a credit card number to receive your token. However, Google claims they will not charge your account without you personally upgrading your service. Proceed at your own discretion.

Once you have an API key you can start building your app!

Create your react app

npm init react-app my-app
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Install dependencies

npm install --save google-maps-react
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This is how we get the google map as a component!
Check your package.json file to make sure it is installed!

Once your initial set up is done you can start coding!

1. Import google-maps-react!

import { Map, GoogleApiWrapper } from 'google-maps-react';
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2. Add the Map Component to your render function!

render() {
    return (
        <Map
          google={this.props.google}
          zoom={8}
          style={mapStyles}
          initialCenter={{ lat: 47.444, lng: -122.176}}
        />
    );
  }
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3. Edit your export default statement

export default GoogleApiWrapper({
  apiKey: 'TOKEN HERE'
})(MapContainer);
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Make sure to insert your API key here!

4. Add styling

If you'd like you can change some style properties. I did as a constant variable outside of my class.

const mapStyles = {
  width: '100%',
  height: '100%',
};
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5. Spin up your server!

google-maps-API

Great! You did it! But honestly, what is the point of a map without any markers! So let's add some!

6. Mark it up!

import { Map, GoogleApiWrapper, Marker } from 'google-maps-react';
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Update your Map component to include a Marker Component!

render() {
    return (
        <Map
          google={this.props.google}
          zoom={8}
          style={mapStyles}
          initialCenter={{ lat: 47.444, lng: -122.176}}
        >
          <Marker position={{ lat: 48.00, lng: -122.00}} />
        </Map>
    );
  }
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Then you'll have this!

google-map-with-marker

Let's add more!

Instead of adding one marker, you can programmatically loop through the state to display places. In my example, I am displaying a few thrift stores in the area. You can also add events to them such as onClick!

export class MapContainer extends Component {
  constructor(props) {
    super(props);

    this.state = {
      stores: [{lat: 47.49855629475769, lng: -122.14184416996333},
              {latitude: 47.359423, longitude: -122.021071},
              {latitude: 47.2052192687988, longitude: -121.988426208496},
              {latitude: 47.6307081, longitude: -122.1434325},
              {latitude: 47.3084488, longitude: -122.2140121},
              {latitude: 47.5524695, longitude: -122.0425407}]
    }
  }

  displayMarkers = () => {
    return this.state.stores.map((store, index) => {
      return <Marker key={index} id={index} position={{
       lat: store.latitude,
       lng: store.longitude
     }}
     onClick={() => console.log("You clicked me!")} />
    })
  }

  render() {
    return (
        <Map
          google={this.props.google}
          zoom={8}
          style={mapStyles}
          initialCenter={{ lat: 47.444, lng: -122.176}}
        >
          {this.displayMarkers()}
        </Map>
    );
  }
}
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And that's all folks!

google-map-with-many-markers

I hope this tutorial helps in building your own app!

Top comments (45)

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titivermeesch profile image
PlayBossWar

Thanks a lot for this!
I had to do a little research for the styling since I wanted to use their custom json style files.
A little tip for those who want to do this too : save it as a defaultProps and they use it as shown above ;)

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cuzureau profile image
Christophe Uzureau

Hey ! Can you tell me more about this ? Where do you pass defaultProps ?

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titivermeesch profile image
PlayBossWar

Here is a link to the file I used it in, it will help you out I think : github.com/titivermeesch/neighbora...

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cuzureau profile image
Christophe Uzureau • Edited

Thanks a lot, it helped me !
Le Bonjour à la Belgique :)

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mqshaikh8 profile image
Mohammed Shaikh

thanks

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vitarox profile image
VitaRox

Great tutorial, thank you!

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codingmage profile image
Yusuf Kehinde Hussein

Wow this is what I have been looking forrrrrr

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mrmicrowaveoven profile image
Benjamin Zagorski

Ugh, thanks so much for making this. The examples on the Google Maps docs were confusing and dumb. Got it done in 2 minutes once I found this.

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am_stevenanongo profile image
stevenanongo

This was really helpful to me thanks a lot

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sanjayjb profile image
sanjayjb

Hey! Thanks a lot for the Maps implementation.
I was wondering how Polygon can be used from google-maps-react to mark a triangle on the map using 3 lat and long coordinates. could you please help me out with that?
thanks in advance :)

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dschulz1227 profile image
Damon Schulz

I am trying to hide my API key by putting it in a default.json in a Config folder and hiding it. it's under my 'src' folder, but when I go to import it to my Map component, it says it is outside of the project '/src' directory. I've tried numerous ways, do you have any idea what I should do?

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sarabs3 profile image
Sarabjeet Singh

Thanks a lot. It's very easy to follow and implement.

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jessicabetts profile image
jessicabetts

Glad I can help!

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sayanmondal2098 profile image
PH3N1X

Thanks for it.