Book Image

Building Enterprise JavaScript Applications

By : Daniel Li
Book Image

Building Enterprise JavaScript Applications

By: Daniel Li

Overview of this book

With the over-abundance of tools in the JavaScript ecosystem, it's easy to feel lost. Build tools, package managers, loaders, bundlers, linters, compilers, transpilers, typecheckers - how do you make sense of it all? In this book, we will build a simple API and React application from scratch. We begin by setting up our development environment using Git, yarn, Babel, and ESLint. Then, we will use Express, Elasticsearch and JSON Web Tokens (JWTs) to build a stateless API service. For the front-end, we will use React, Redux, and Webpack. A central theme in the book is maintaining code quality. As such, we will enforce a Test-Driven Development (TDD) process using Selenium, Cucumber, Mocha, Sinon, and Istanbul. As we progress through the book, the focus will shift towards automation and infrastructure. You will learn to work with Continuous Integration (CI) servers like Jenkins, deploying services inside Docker containers, and run them on Kubernetes. By following this book, you would gain the skills needed to build robust, production-ready applications.
Table of Contents (26 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Free Chapter
1
The Importance of Good Code
Index

Hotfixes


The last thing we need to cover for our Git workflow is how to deal with bugs we discover in production (on our master branch). Although our code should have already been thoroughly tested before being added to master, subtle bugs are bound to slip through, and we must fix them quickly. This is call a hotfix.

Working on a hotfix branch is very similar to working on a release branch; the only difference is that we are branching off master instead of dev. Like with release branches, we'd make the changes, test it, deploy it onto a staging environment, and perform more testing, before merging it back into master, dev, and any current release branches:

So, first we make the fix:

$ git checkout -b hotfix/user-schema-incompat master
$ touch user-schema-patch.txt # Dummy hotfix
$ git add -A
$ git commit -m "Patch user schema incompatibility with social login"

Then, we merge it into master:

$ git checkout master
$ git merge --no-ff hotfix/user-schema-incompat

As we have added something new to...