# Transforming Our Frontend: Navigating the Next.js and TypeScript Evolution

Our project is a web application built with **Next.js** and **TypeScript**, designed for scalability, performance, and user-friendliness. Currently, the application is transitioning from **JavaScript** to **TypeScript**, aiming for better maintainability, type safety, and error reduction. This blog series will detail our journey of addressing the challenges in migration, enhancing performance, and improving the overall architecture.

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## Current Architecture

### Frontend Framework

* **Next.js**: Provides server-side rendering, dynamic routing, and static site generation.
    
* **TypeScript**: Replacing JavaScript incrementally to enable better type safety and robust development.
    
* **React**: Used for building declarative, reusable UI components.
    

### Deployment and Infrastructure

* **Dockerized Containers**: Ensure a consistent environment for development and deployment.
    
* **Helm Charts**: Manage environment-specific deployments (dev, staging, production) with overrides.
    
* **Node.js**: Backend support for APIs and server-side rendering.
    

### Libraries and Dependencies

The project uses several key libraries to enhance functionality and developer productivity:

#### UI/UX and Components

* `@chakra-ui/react`: For building accessible, responsive UIs.
    
* `@emotion/react` and `@emotion/styled`: For custom styling.
    
* **Framer Motion**: For animations and transitions.
    
* **React Icons**: Provides a library of commonly used icons.
    

#### Data Visualization

* `@nivo/bar`, **chart.js**, and **react-chartjs-2**: For interactive charts and data visualizations.
    
* **Reactflow**: Enables building node-based visualizations like workflows and dependency trees.
    
* **Vis-network**: For creating interactive, hierarchical network visualizations.
    

#### State Management and Data

* **MobX** and **MobX React**: Lightweight, reactive state management.
    
* `@tanstack/react-table`: For building feature-rich, performant data tables.
    
* **Axios**: Handles HTTP requests with ease.
    

#### Utilities and Miscellaneous

* **Lodash**: For utility functions like deep copying, object manipulation, and array operations.
    
* **Date-fns** and **Day.js**: For date manipulation and formatting.
    
* **Html2pdf.js**: To generate PDFs from HTML.
    

#### Animations and Special Features

* **Tsparticles**: Creates interactive particle animations.
    
* **Draft.js** and **React-draft-wysiwyg**: For creating rich-text editors.
    
* **React-to-print**: Enables printing React components.
    

#### Scripting and Build Tools

* **Eslint**: For linting and enforcing coding standards.
    
* **Source-map-explorer**: Analyzes and visualizes JavaScript bundle sizes.
    
* **TypeScript**: Enhances static type-checking and scalability of the codebase.
    

### Codebase Organization

* **Mixed Codebase**: A combination of JavaScript and TypeScript files due to the ongoing migration.
    
* **Clear Directory Structure**:
    
    * `pages/`: For route-specific components and server-side rendering logic.
        
    * `components/`: For reusable React components.
        
    * `scripts/`: Contains deployment and build scripts.
        
    * `configs/`: Environment-specific overrides.
        

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## Current Challenges

1. **JavaScript-to-TypeScript Migration**:
    
    * **Status**: Approximately **30%** of the codebase remains in JavaScript.
        
    * **Challenges**: Refactoring legacy modules, external library typings, and managing dynamic imports.
        
2. **Heavy Animations**:
    
    * Drawer and modal animations feel heavy on some lower-spec systems.
        
    * Current implementations lack GPU optimization.
        
3. **Build Optimization**:
    
    * Dependencies like charting libraries increase the bundle size.
        
    * Some unused modules contribute to unnecessary overhead.
        
4. **Configuration Complexity**:
    
    * Managing overrides for multiple environments can be error-prone and time-consuming.
        

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## Upcoming Modifications

To address these challenges, we plan the following improvements:

1. **Complete TypeScript Migration**:
    
    * Migrate legacy JavaScript files while enforcing strict typing.
        
    * Refactor utilities and APIs for cleaner TypeScript integration.
        
2. **Optimize Animations**:
    
    * Rewrite heavy animations using GPU-accelerated techniques.
        
    * Simplify animation logic to reduce resource usage.
        
3. **Improve Build Performance**:
    
    * Dynamically import rarely used libraries to reduce initial bundle size.
        
    * Analyze dependencies with `source-map-explorer` and remove unused modules.
        
4. **Streamline Configurations**:
    
    * Consolidate environment-specific overrides to minimize redundancy.
        
    * Refactor Helm charts for better modularity and scalability.
        
5. **Enhance UI/UX**:
    
    * Leverage Chakra UI for improved accessibility and responsiveness.
        
    * Use `@tanstack/react-table` for performant and feature-rich data tables.
        

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## Conclusion

With a strong foundation built on modern technologies, our project is evolving to meet the needs of both users and developers. By addressing these challenges, we aim to create a robust, maintainable, and high-performing frontend application. This blog series will walk you through each step of this transformation.

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