Book Image

Node.js 6.x Blueprints

By : Fernando Monteiro
Book Image

Node.js 6.x Blueprints

By: Fernando Monteiro

Overview of this book

Node.js is the most popular framework to create server-side applications today. Be it web, desktop, or mobile, Node.js comes to your rescue to create stunning real-time applications. Node.js 6.x Blueprints will teach you to build these types of projects in an easy-to-understand manner. The key to any Node.js project is a strong foundation on the concepts that will be a part of every project. The book will first teach you the MVC design pattern while developing a Twitter-like application using Express.js. In the next chapters, you will learn to create a website and applications such as streaming, photography, and a store locator using MongoDB, MySQL, and Firebase. Once you’re warmed up, we’ll move on to more complex projects such as a consumer feedback app, a real-time chat app, and a blog using Node.js with frameworks such as loopback.io and socket.io. Finally, we’ll explore front-end build processes, Docker, and continuous delivery. By the end of book, you will be comfortable working with Node.js applications and will know the best tools and frameworks to build highly scalable desktop and cloud applications.
Table of Contents (16 chapters)
Node.js 6.x Blueprints
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Using the Geolocation HTML5 API


We can use various resources to get the user's position, so we are using the HTML5 API in this example. We will use an external JavaScript file to create a map with the exact location of the user:

  1. Create a file called getCurrentPosition.js and save it within the public/js folder.

  2. Place the following code in getCurrentPosition.js:

          function getCurrentPosition() { 
              // Check boreswer/navigator support 
          if (navigator.geolocation) { 
          var options = { 
            enableHighAccuracy : true, 
            timeout : Infinity, 
            maximumAge : 0 
          }; 
            navigator.geolocation.watchPosition(getUserPosition, trackError,
            options); 
          }
          else { 
            alert('Ops; Geolocation is not supported'); 
          } 
             // Get user position and place a icon on map 
          function getUserPosition(position) { 
                // Check longitude and latitude 
          console.log(position.coords.latitude); 
          console.log(position.coords...