What kind of checks are we talking about? For starters, running our unit tests to make sure everything passes, building and bundling our front end to make sure the build won’t fail on production, and running our linters to enforce a standard.
At my current company, we run many checks before any code can be committed to the repository.
CI lets us run code checks automatically. Who wants to run all those commands before pushing code to the repository?
Getting Started
I’ve chosen CircleCI because of its generous free tier, GitHub because of its community, and React because it’s easy and fun to use.
Create React App
Create your React app to your liking. For simplicity’s sake, I’m using CRA.
Create GitHub Repository
Once you’re finished with CRA, push the code to your GitHub repository.
Setting Up CI With CircleCI
If you already have a CircleCI account, great! If not, create one here.
Once you’ve logged in, click on Add Projects.
Adding a Project to CircleCI
Find your repository and click Set Up Project.
Setting up a project
Now we should see some instructions.
Simple enough, let’s create a folder called .circleci, and place the config.yml inside the folder.
We specify the CircleCI version, orbs, and workflows. Orbs are shareable configuration packages for your builds. A workflow is a set of rules for defining a collection of jobs and their run order.
orbs:
react: "thefrontside/react@dev:alpha"
version: 2.1
workflows:
push:
jobs:
- react/install
- react/eslint:
requires:
- react/install
- react/test:
requires:
- react/install
- react/coverage:
requires:
- react/install
Push the Code to Your Repository
Start building
Head back to CircleCI and press Start building.
If you click on the build, you can monitor what actually happened. In this case, the welcome orb is a demo and doesn’t do much.
Setting Up CircleCI With React
Use config.yml setup to run test, lint and build checks with React.
After you’ve pushed this code, give the orb the permissions it needs.
Settings -> Security -> Yes, allow orbs
Each commit/PR now runs the workflow jobs.
Check CircleCI for the progress of the jobs. Here’s what CircleCI is doing for each commit:
- Set up the React project.
- Runs ESLint to check the formatting of the code.
- Runs unit tests.
- Runs test coverage.
All of the workflow jobs above have to succeed for the commit and build to be successful.
Each commit now has a green, red or yellow tick indicating the status! Handy.
If you’re curious to learn more about the best practices for security, scalability, and dev ops, start from this book.
Recommended Reading
☞ React Redux binding with React Hooks and Proxy
☞ Understanding React [setState](https://morioh.com/p/1250c804cabb/understanding-react-setstate "setState")
☞ Creating Micro Frontends using Web Components (with Angular and React)
☞ Aalpha Experts Are Your Choice Hire Mobile App Developers in India
☞ JavaScript Features You Should Know Before Learn React
☞ Deploy ReactJS App with AWS S3
☞ Create Your First React App In Easy Steps
#reactjs #javascript #github
