React google map integration with Live Demo

Today we will learn how to integrate google map in your React Application. In this React google map integration tutorial, we would love to share each things step by step with example.

Before start integrating Google Map in your React Application, We need a React Project. If you don’t know how to create a new project. Follow this tutorial.

So, Let’s get started React google map integration

First, let’s add a placeholder for Google Map

Open App.js file and replace the render method with below html markup

render() {
    return (
    <div className="row mt-5">
        <div className="col-md-10 mx-auto">
            <h2 className="text-left">Google Map</h2>
            <div className="card mt-3">
                <div className="card-body">
                    <div ref="map" style={{'width':'100%', 'height':'400px' }}></div>
                </div>
            </div>
        </div>
    </div>
    );
}

Here, You might be notice that ref="map" attribute. The Refs are commonly assigned to an instance property when a component is constructed so they can be referenced throughout the component.

Next, Loading the Maps JavaScript API

Now, I am going to load the Maps JavaScript API in the App.js file. If you don’t want to load it globally. You can create a new component and load it.

So, open the App.js file and put the below two methods on this

renderMap = () => {

    window['initMap'] = () => {
        this.loadMap();      
    }
    if(!window.document.getElementById('google-map-script')) {
        var s = window.document.createElement("script");
        s.id = "google-map-script";
        s.type = "text/javascript";
        s.src = "https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&amp;callback=initMap";
        
        window.document.body.appendChild(s);
    } else {
        this.loadMap();
    }
}
loadMap = () => {

    var map = new window['google'].maps.Map(this.refs.map, {
        center: {lat: 22.7196, lng: 75.8577},
        zoom: 8
    });
    
    var marker = new window['google'].maps.Marker({
        position: {lat: 22.7196, lng: 75.8577},
        map: map,
        title: 'Hello World!',
        draggable: true,
        animation: window['google'].maps.Animation.DROP,
    });

    var contentString = '<div id="content">'+
    '<div id="siteNotice">'+
    '</div>'+
    '<h3 id="thirdHeading" class="thirdHeading">W3path.com</h3>'+
    '<div id="bodyContent">'+
    '<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>'+
    '</div>'+
    '</div>';

    var infowindow = new window['google'].maps.InfoWindow({
        content: contentString
    });

    marker.addListener('click', function() {
        infowindow.open(map, marker);
    });
    
}    

In order to do any kind of interaction with the Maps API, you need an API key from Google. Follow the instructions here to get that set up. After the setup complete, You need to replace YOUR_API_KEY with google map key.

You may noticed that, we have load the Google Maps JavaScript CDN under the renderMap method.

The renderMap method will check that the Google Maps JavaScript CDN is already loaded or not. If not then it will load the Google Maps JavaScript CDN. If already loaded then will call the loadMap method.

The loadMap will draw the map.

Next, We will call the renderMap method under componentDidMount method. like this

componentDidMount() {
    this.renderMap();
}

componentDidMount() is invoked immediately after a component is mounted (inserted into the tree).

After above changes our App.js file will looks like this

import React, { Component } from 'react';

class App extends Component {

    componentDidMount() {
        this.renderMap();
    }

    renderMap = () => {
  
        window['initMap'] = () => {
          this.loadMap();      
        }
        if(!window.document.getElementById('google-map-script')) {
          var s = window.document.createElement("script");
          s.id = "google-map-script";
          s.type = "text/javascript";
          s.src = "https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&amp;callback=initMap";
          
          window.document.body.appendChild(s);
        } else {
          this.loadMap();
        }
    }

    loadMap = () => {

        var map = new window['google'].maps.Map(this.refs.map, {
            center: {lat: 22.7196, lng: 75.8577},
            zoom: 8
        });
        
        var marker = new window['google'].maps.Marker({
            position: {lat: 22.7196, lng: 75.8577},
            map: map,
            title: 'Hello World!',
            draggable: true,
            animation: window['google'].maps.Animation.DROP,
        });
    
        var contentString = '<div id="content">'+
        '<div id="siteNotice">'+
        '</div>'+
        '<h3 id="thirdHeading" class="thirdHeading">W3path.com</h3>'+
        '<div id="bodyContent">'+
        '<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>'+
        '</div>'+
        '</div>';
    
        var infowindow = new window['google'].maps.InfoWindow({
            content: contentString
        });
    
        marker.addListener('click', function() {
            infowindow.open(map, marker);
        });
        
    }    
  
    render() {
  
      return (
        <div className="row mt-5">
            <div className="col-md-10 mx-auto">
                <h2 className="text-left">Google Map</h2>
                <div className="card mt-3">
                    <div className="card-body">
                        <div ref="map" style={{'width':'100%', 'height':'400px' }}></div>
                    </div>
                </div>
            </div>
        </div>
      );
    }
  }
  


export default App;

Running application:

Run application using npm start and you should see Google Map inside browser. Congrats!! See, it was easy.

One Comment

  1. Divine said:

    Great lesson. I love this…

    July 7, 2019
    Reply

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