Table of Contents for
Server Side development with Node.js and Koa.js Quick Start Guide

Version ebook / Retour

Cover image for bash Cookbook, 2nd Edition Server Side development with Node.js and Koa.js Quick Start Guide by Olayinka Omole Published by Packt Publishing, 2018
  1. Server Side Development with Node.js and Koa.js Quick Start Guide
  2. Title Page
  3. Copyright and Credits
  4. Server Side Development with Node.js and Koa.js Quick Start Guide
  5. About Packt
  6. Why subscribe?
  7. Packt.com
  8. Contributors
  9. About the author
  10. About the reviewer
  11. Packt is searching for authors like you
  12. Table of Contents
  13. Preface
  14. Who this book is for
  15. What this book covers
  16. To get the most out of this book
  17. Download the example code files
  18. Download the color images
  19. Code in action
  20. Conventions used
  21. Get in touch
  22. Reviews
  23. Introducing Koa
  24. Technical requirements
  25. What is Koa?
  26. What can you do with Koa?
  27. Why choose Koa?
  28. When you should not use Koa
  29. Koa versus Express
  30. How can this book help you understand Koa better?
  31. Summary
  32. Getting Started with Koa
  33. Technical requirements
  34. Modern JavaScript
  35. A primer on Node
  36. What is async… await?
  37. The promise class
  38. Introducing async
  39. Introducing await
  40. Installing Koa
  41. Using Babel
  42. Starting a server in Koa
  43. Summary
  44. Koa Core Concepts
  45. Technical requirements
  46. The application object
  47. Useful application methods
  48. Settings
  49. The context object
  50. Context object API
  51. Aliases
  52. The request object
  53. Content negotiation
  54. The response object
  55. Middleware
  56. Cascading in Koa
  57. Defining middleware
  58. Registering middleware
  59. Common middleware
  60. Summary
  61. Handling Errors in Koa
  62. Technical requirements
  63. Catching errors in Koa
  64. Koa's default error handler
  65. Emitting errors
  66. Error event listener
  67. Throwing HTTP errors
  68. Writing error handlers
  69. Summary
  70. Building an API in Koa
  71. Technical requirements
  72. Project setup
  73. Initialization
  74. Installing dependencies
  75. Structure
  76. Building the application
  77. Starting the server
  78. Using Nodemon
  79. Connecting to a database
  80. Creating data models
  81. Setting up the router
  82. Setting up a logger
  83. Creating contact endpoints and controller actions
  84. Retrieving all contacts
  85. Storing new contacts
  86. Retrieving a single contact
  87. Updating a contact
  88. Deleting a contact
  89. Validating requests
  90. Useful notes
  91. Summary
  92. Building an Application in Koa
  93. Technical requirements
  94. About the application
  95. Setting up a project
  96. Installing dependencies
  97. Project structure
  98. Building the application
  99. Starting the server
  100. Connecting to the database
  101. Creating data models
  102. The user model
  103. The post model
  104. Setting up the router
  105. Setting up the views
  106. Using partials
  107. Setting up sessions
  108. Handling authentication
  109. User registration and login
  110. Authentication middleware
  111. Creating controller functions
  112. Summary
  113. Other Books You May Enjoy
  114. Leave a review - let other readers know what you think

Introducing Koa

Node.js, which was introduced in 2009, has become very popular for building applications and APIs on the web. One of the major factors that influenced its increase in popularity is the fact that developers can now use a single language for developing their applications, both on the server side and client side. JavaScript developers who usually only worked on client-side applications in the past could now work on server-side applications with the same development stack. This increase in popularity and adoption has led to a lot of community enthusiasm and support, which by extension has caused a lot of frameworks and plugins being developed to optimize scripting and software development in Node.js.

Many of these frameworks are focused on different ideologies and functionalities. Express.js, with over four million weekly downloads as at the time of writing, is one of the more popular frameworks for Node.js. It was built to be a very simple and unopinionated framework for quickly building out web applications in Node.js. Koa.js was built to be an improvement on Express.js, with the same underlying philosophy.

Since its introduction, JavaScript has continually evolved and every iteration brings with it advantages and upgrades. Koa leverages on a lot of new and shiny things in the newer JavaScript versions, such as the async... await syntax. These features are part of what makes Koa a fast and easy-to-use web development tool.

The topics that will be covered in this chapter are the following:

  • What is Koa?
  • What can you do with Koa?
  • Why choose Koa?
  • When you should not use Koa
  • Introducing Koa2
  • Koa versus Express
  • How can this book help you understand Koa better?