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My first time using React 16.0

letsbsocial1 profile image Maria Campbell ・2 min read

Yesterday I started working on a new React project which I am calling for the time being React Universal Blog. I set up my basic workflow, directory structure, and files. I set up for Jest testing, initially mocking out stylesheets and images to make sure everything was working properly. Later I'll switch over to mocking CSS Modules, because I use them with POSTCSS. It's not necessary to do that unless you intend to use Jest Snapshot Testing, and I do! I really want to check it out, and it just makes sense when you do use CSS Modules in development.

But that's not why I am writing this post. I started this new project yesterday. And guess what big event took place yesterday! React 16.0 was released! And guess what happened in my project. I installed React 16.0.

Before I realized all this, I decided to make sure that my Jest configuration was working, so today I typed npm run test in Terminal. This is what was printed out to the console:

> react-universal-blog-app@1.0.0 test /Users/mariacam/Development/react-universal-blog-app
> jest

PASS  src/sum.test.js
PASS  src/App.test.js
  ● Console

    console.error node_modules/fbjs/lib/warning.js:33
      Warning: React depends on requestAnimationFrame. Make sure that you load a polyfill in older browsers. http://fb.me/react-polyfills


Test Suites: 2 passed, 2 total
Tests:       2 passed, 2 total
Snapshots:   0 total
Time:        1.669s
Ran all test suites.

Notice something different?

console.error node_modules/fbjs/lib/warning.js:33
  Warning: React depends on requestAnimationFrame. Make sure that you load a polyfill in older browsers. http://fb.me/react-polyfills

That's what reminded me that React 16.0 was released yesterday, and that my project must be using it! I wonder what other new goodies I will encounter!

Happy coding!

Discussion

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Ben Halpern

As someone who's familiar with the React API/ecosystem but hasn't actually followed in a while, what are the latest features and trends with this release and in general?

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Maria Campbell Author

Very good question Ben! Your question prompted me to go into the official documentation and find out. There is ALOT that is changing with v16.0. I can't even begin to summarize it in a comment, as I haven't studied it very closely. I however, have written a second article regarding next steps I took to make my React app version 16 compatible, and it covers a good portion of what needs to take place in order for your React App to return no errors or warnings in Terminal/console. I will posting my second article shortly. And here is the link to the official docs for React v16.0: facebook.github.io/react/blog/2017...

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Ben Halpern

Oh cool, all looks good. I like improved server-render support and library size reduction.

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Jose Ross Barredo

Thanks for this! Haven't been updated with React in a while. Is it a full release?

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Maria Campbell Author

Very much so. I just published another article about what I had to add to my package.json/workflow just based on running npm run test in Terminal. I am working on a new project that I started yesterday and inadvertently installed React 16. I will be writing posts about my experiences building it with React 16. That's how I will be approaching going over the new features/upgrades/downgrades/deprecations etc. Glad you enjoyed it and perhaps even got something out of it. Thanks!