Common MFE in Micro Front Ends
Published: 2024-03-07 11:43:41

The objective of a Common Micro Frontend (MFE) in a React project is to provide a shared library of components, utilities, or services that can be used across multiple micro frontends. This is done to promote code reusability, maintain consistency, and improve development efficiency. Here are the main objectives in details : 
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1.	Promote Code Reusability: By creating a common MFE, you can write a component or utility once and reuse it across multiple micro frontends. This reduces the amount of duplicate code and can make your codebase easier to maintain.
2.	Maintain Consistency: A common MFE can help ensure that certain elements of your application are consistent across all micro frontends. This could be UI components, design elements, or even certain pieces of functionality. This helps in maintaining a consistent user experience across the application.
3.	Improve Development Efficiency: With a common MFE, developers can leverage the shared components or utilities, allowing them to focus on the unique features of their specific micro frontend. This can speed up development time and reduce complexity.
4.	Ease of Updates: When a shared component needs to be updated, it can be done in the common MFE, and all micro frontends using that component can receive the update. This centralizes the update process and makes it easier to manage.
5.	Reduce Bundle Size: By sharing common code, you can potentially reduce the overall size of your JavaScript bundles, which can lead to performance improvements.

Common Micro Frontends (MFEs) in a React project can provide several benefits:
1.	Code Reusability: Common MFEs allow you to share and reuse components across different micro frontends. This can reduce the amount of code you need to write and maintain.
2.	Consistency: By using common components, you can ensure a consistent look and feel across your application. This is particularly useful for things like branding and user interface design.
3.	Efficiency: Common MFEs can improve development efficiency. Developers can focus on building unique features for their specific micro frontend, rather than rebuilding common components.
4.	Isolation: Changes to a common MFE can be made in one place and propagated to all micro frontends that use it. This isolation can make it easier to manage and test changes.
5.	Scalability: Common MFEs can make your application more scalable. As your application grows, you can add more micro frontends that use the common components, without increasing the complexity of your codebase.
However, it's important to manage common MFEs carefully. Changes to a common MFE can potentially impact multiple micro frontends, so it's important to thoroughly test changes and manage versions carefully. Also, overuse of common MFEs can lead to tight coupling between micro frontends, which can reduce the benefits of the micro frontend architecture

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Micro Frontends (MFEs) have emerged as a popular architectural style for building modern web applications. The idea is to break down the frontend monolith into smaller, more manageable pieces, each with its own development lifecycle. This approach brings the benefits of microservices to the frontend world, such as independent deployment, technology freedom, and team autonomy. However, one challenge that arises with MFEs is the potential for code duplication and inconsistency across the different frontends. This is where Common MFEs come into play.
A Common MFE is essentially a shared library of components, utilities, or services that can be used across multiple micro frontends. The primary objective of a Common MFE is to promote code reusability, maintain consistency, and improve development efficiency.
By creating a common MFE, you can write a component or utility once and reuse it across multiple micro frontends. This reduces the amount of duplicate code and can make your codebase easier to maintain. For instance, you might have a common Button component that is used across multiple micro frontends. Instead of duplicating this component in each micro frontend, you can include it in a Common MFE and import it wherever it's needed.
A common MFE can also help ensure that certain elements of your application are consistent across all micro frontends. This could be UI components, design elements, or even certain pieces of functionality. This helps in maintaining a consistent user experience across the application. For example, if you have a specific design language or branding that needs to be consistent across your application, you can include these elements in your Common MFE.
With a common MFE, developers can leverage the shared components or utilities, allowing them to focus on the unique features of their specific micro frontend. This can speed up development time and reduce complexity. For instance, if you have a utility function for formatting dates that is used across multiple micro frontends, you can include this function in your Common MFE and import it wherever it's needed.
When a shared component needs to be updated, it can be done in the common MFE, and all micro frontends using that component can receive the update. This centralizes the update process and makes it easier to manage. However, it's important to manage these 
updates carefully to avoid breaking changes.
Micro Frontends (MFEs) have emerged as a popular architectural style for building modern web applications. The idea is to break down the frontend monolith into smaller, more manageable pieces, each with its own development lifecycle. This approach brings the benefits of microservices to the frontend world, such as independent deployment, technology freedom, and team autonomy. However, one challenge that arises with MFEs is the potential for code duplication and inconsistency across the different frontends. This is where Common MFEs come into play.
A Common MFE is essentially a shared library of components, utilities, or services that can be used across multiple micro frontends. The primary objective of a Common MFE is to promote code reusability, maintain consistency, and improve development efficiency.
By creating a common MFE, you can write a component or utility once and reuse it across multiple micro frontends. This reduces the amount of duplicate code and can make your codebase easier to maintain. For instance, you might have a common Button component that is used across multiple micro frontends. Instead of duplicating this component in each micro frontend, you can include it in a Common MFE and import it wherever it's needed.
A common MFE can also help ensure that certain elements of your application are consistent across all micro frontends. This could be UI components, design elements, or even certain pieces of functionality. This helps in maintaining a consistent user experience across the application. For example, if you have a specific design language or branding that needs to be consistent across your application, you can include these elements in your Common MFE.
With a common MFE, developers can leverage the shared components or utilities, allowing them to focus on the unique features of their specific micro frontend. This can speed up development time and reduce complexity. For instance, if you have a utility function for formatting dates that is used across multiple micro frontends, you can include this function in your Common MFE and import it wherever it's needed.
When a shared component needs to be updated, it can be done in the common MFE, and all micro frontends using that component can receive the update. This centralizes the update process and makes it easier to manage. However, it's important to manage these updates carefully to avoid breaking changes.
By sharing common code, you can potentially reduce the overall size of your JavaScript bundles, which can lead to performance improvements. However, it's important to manage your Common MFEs carefully to avoid bloating them with unnecessary code.
While Common MFEs have many benefits, they also come with their own set of challenges. One of the main challenges is managing dependencies and ensuring that changes to the Common MFE do not break the micro frontends that depend on it. This requires careful versioning and testing.
Another challenge is avoiding tight coupling between the micro frontends and the Common MFE. While it's beneficial to share common code, it's also important to maintain the independence of each micro frontend. This requires careful design and architecture.
In conclusion, Common MFEs are a powerful tool for managing code in a micro frontend architecture. They promote code reusability, maintain consistency, and improve development efficiency. However, like any tool, they need to be used wisely and managed carefully to get the most out of them.

By sharing common code, you can potentially reduce the overall size of your JavaScript bundles, which can lead to performance improvements. However, it's important to manage your Common MFEs carefully to avoid bloating them with unnecessary code.
While Common MFEs have many benefits, they also come with their own set of challenges. One of the main challenges is managing dependencies and ensuring that changes to the Common MFE do not break the micro frontends that depend on it. This requires careful versioning and testing.
Another challenge is avoiding tight coupling between the micro frontends and the Common MFE. While it's beneficial to share common code, it's also important to maintain the independence of each micro frontend. This requires careful design and architecture.
In conclusion, Common MFEs are a powerful tool for managing code in a micro frontend architecture. They promote code reusability, maintain consistency, and improve development efficiency. However, like any tool, they need to be used wisely and managed carefully to get the most out of them.


Remember, while common MFEs have these objectives, it's important to manage them carefully to avoid tight coupling between micro frontends and to ensure that changes to the common MFE do not have unintended side effects on the micro frontends that use them