Book Image

JavaScript and JSON Essentials - Second Edition

By : Bruno Joseph D'mello, Sai S Sriparasa
Book Image

JavaScript and JSON Essentials - Second Edition

By: Bruno Joseph D'mello, Sai S Sriparasa

Overview of this book

JSON is an established and standard format used to exchange data. This book shows how JSON plays different roles in full web development through examples. By the end of this book, you'll have a new perspective on providing solutions for your applications and handling their complexities. After establishing a strong basic foundation with JSON, you'll learn to build frontend apps by creating a carousel. Next, you'll learn to implement JSON with Angular 5, Node.js, template embedding, and composer.json in PHP. This book will also help you implement Hapi.js (known for its JSON-configurable architecture) for server-side scripting. You'll learn to implement JSON for real-time apps using Kafka, as well as how to implement JSON for a task runner, and for MongoDB BSON storage. The book ends with some case studies on JSON formats to help you sharpen your creativity by exploring futuristic JSON implementations. By the end of the book, you'll be up and running with all the essential features of JSON and JavaScript and able to build fast, scalable, and efficient web applications.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Inserting external JavaScript


In real-world applications, JSON can be retrieved either as a response from an asynchronous request or from a JSON feed. A website uses HTML, CSS, and JavaScript to provide a visually beautiful user interface. But there are cases where data vendors are only focused on getting data. A data feed serves their purpose; a feed is a crude way of supplying data so that others can reuse it to display the data on their websites or to ingest the data and run their algorithms on it. Such data feeds are big and cannot be directly embedded into thescripttag. Let us look at how external JavaScript files can be included in an HTML file.

The following screenshot depicts the code for the external-js.html file:

<!DOCTYPE html>
<html>
<head>
  <title>Include external javascript</title>
  <script type="text/javascript" src="example.js"></script>
  <script type="text/javascript">
    alert(x);
  </script>
</head>
<body...