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https://github.com/xavierlefevre/shared-react-components-example

An example of a mono-repository of shared React components libraries!
https://github.com/xavierlefevre/shared-react-components-example

atomic-design design-system design-systems lerna libraries library mono-repo monorepo react react-component react-components reactjs share shared shared-library sharing storybook ui ui-components yeoman

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An example of a mono-repository of shared React components libraries!

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# ⚙ Shared Components: Project example of shared React components



⚠️ This repository is a pure example, not a boilerplate (as we did not update its dependencies in a while)



🔍 Here you'll discover:

- [Specific tips to make you accelerate](https://github.com/shared-components/shared-react-components-example#key-learnings)

- [A playground: You can copy paste the repo entirely to reuse it as is](https://github.com/shared-components/shared-react-components-example#locally-start-the-project)







## Key learnings!



### **0. ⁉️ Should you develop such a project?**



From our experience, we proved in which condition it is valuable to share components between apps: [find out more with this article](https://medium.com/theodo/when-and-how-to-share-ui-components-between-apps-a44a44382de1).



### **1. 🧐 Use a mono-repository**



Split your responsibilities and domains in different packages, but have them all in one place for a smoother developer experience. We use [Lerna](https://github.com/lerna/lerna) for managing our mono-repo.



### **2. ⚛️ Follow "Atomic Design" principles**



An atom is a very small dumb and highly reusable component, while an organism is a full grown one-page business connected feature. It all comes from [Brad Frost Atomic Design principles](http://bradfrost.com/blog/post/atomic-web-design/). You can find diagrams of the project architecture [here](documentation/technical-standards/architecture.md).



### **3. 🎪 Display it all in one unique showroom: Storybook**



We use [Storybook](https://storybook.js.org/) to develop and showcase our components! One central and unbiased place, forcing any contributor to always think reusability. To try it, [install the project](documentation/how-to-contribute/2-getting-started.md) and run `yarn start`.



### **4. 🔨 Simplify your packages versioning and beware of breaking changes**



Use automatic versionning ([commitizen](http://commitizen.github.io/cz-cli/)), changelogs and type systems ([Flow](https://flow.org/) or [TypeScript](https://www.typescriptlang.org/)) to prevent messy bugs because of unanticipated breaking changes.



### **5. 🏭 Create new components/libraries with a "generator"**



Make sure that any new component follow the same design choices by using a "generator" like Yeoman.



### **6. 💄 Define your customisation strategy**



We used Styled Components themes and an additionnal service of ours to define how our components can be customised. [Find here more details](documentation/development/how-to-style-a-component.md).



### **7. 🌬 Make your packages light**



By building your packages as [ES6 modules](http://exploringjs.com/es6/ch_modules.html), your users will just bundle what they need. You can [find out how we did here](documentation/6-make-light-packages.md)



### **8. 👮‍ Control what components and features enter the repo**



Developing on "Shared components" is heavier than on a normal project, hence taking the decision to create a new component should be well thought. We recommend to plan at least 3 reuses of the component to make it worthwile. Here is [our decision tree](documentation/how-to-contribute/1-decision-making.md) to help us make that decision.



### **9. 🛣 Define a strict feature branch Git flow**



For us, all feature branches start from Master. PRs are first merged on Develop. Then on Master.

Regularly, we automatically merge Master in Develop to keep them aligned.



### **10. ♻️ Regularly update your dependencies**



More than any other project, "Shared components" has to be aligned with the latest standards, as new projects might launch and need to be compatible with it.



### **11. 👩‍💻👨‍💻 Dedicate a core team**



Just as an open source project, have a dedicated tech and business team focused on making "Shared components" a success. Without a core team, you won't have the focus and ownership necessary to handle such a project, hence the complexity and debt will accumulate and your developers will end up losing more time than winning, in the long run. We will be more specific in a dedicated article later on.



### **12. 🔗 Ease the Yarn Link pain**



If you want to locally test your component on your host project, you'll have to use "Yarn Link", we learned how [to deal with it](documentation/how-to-contribute/4.1-yarn-link.md).








## Locally start the project



If you want to try the project out and at first launch the local Storybook: follow the [installation steps here](documentation/how-to-contribute/2-getting-started.md)!








## The stack



![stack flow](documentation/presentation/stack-flow.png)

![stack list](documentation/presentation/stack-list.png)








## Roadmap



- [x] Finish the MVP: main readme + global article + basic Storybook running locally

- [x] Share online to see if it interests people

- [ ] Have an up and running project with working CI and hosted Storybook

- [ ] Deep dive on key learnings with further articles and project improvement

- [ ] Update of the repository basis to make it a boilerplate



## Contributors



|   [
Aurélien Le Masson](https://github.com/Ojisama)
    | [
Michel Parreno](https://github.com/michel-p)
 | [
Hugo Lime](https://github.com/HugoLime)
 | [
Justine Mignot](https://github.com/justinemignot)
 | [
Surya Ambrose](https://github.com/suryaambrose)
 | [
Ivan Poiraudeau](https://github.com/ivanosevitch)
 | [
Xavier Lefèvre](https://github.com/xavierlefevre)
 |

| :------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :---------------------------------------------------------------------------------------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------------------------------------------------------------------: | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------: |

| [
Albéric Trancart](https://github.com/AlbericTrancart)
 | [
Darya Talanina](https://github.com/invfo)
 |



## Powered by



| [
Theodo
](https://www.theodo.fr) |

| :--------------------------------------------------------------------------------------------------------: |



## License



Shared Components is [MIT licensed](LICENSE.md).