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Convert ejs to React

Converting EJS (Embedded JavaScript) templates to React components involves rewriting the template logic and structure to JSX syntax, which is used in React. EJS is a templating language often used in server-side rendering (SSR) environments, while react is a JavaScript library for building user interfaces. Here's a high-level overview of the process:

Understand the EJS Template:

Familiarize yourself with the structure and logic of the EJS template you want to convert. Identify the dynamic parts of the template, such as variables, loops, conditionals, and HTML rendering.

Create React Components:

Break down your EJS template into smaller reusable React components. Each component should encapsulate a specific piece of UI and its associated logic.

Rewrite EJS Logic in JSX:

Convert the dynamic parts of the EJS template into JSX syntax. For example, replace EJS variable interpolations (<%= variable %>) with JSX curly braces ({variable}), loops, and conditionals can be converted to JavaScript expressions within JSX.

Use React State and Props:

Incorporate React state and props to manage the dynamic data and component interactions. EJS templates often use data passed from the server, while in React, you'll use props to pass data down the component tree and state to manage component-specific data.

Handle Events and Interactivity:

Implement event handling using React event system. Replace any EJS-based event handling with appropriate React event handlers.


Rewrite CSS styles to use React approach to styling. You can use inline styles, CSS modules, or third-party styling libraries like styled-components.

Testing and Debugging:

Thoroughly test your converted React components to ensure they render as expected and handle dynamic data correctly. Use tools like React DevTools and browser developer tools for debugging.

Refactor and Optimize:

Refactor your React components to follow best practices and improve performance. Consider breaking down complex components further, using React hooks, and optimizing re-renders.


Integrate your new React components into your existing React application or build a new one if needed. Ensure proper routing, component hierarchy, and data flow.

Handling Data:

In EJS, data is often passed from the server to the template during server-side rendering. In React, you'll typically fetch and manage data on the client side using techniques like AJAX requests, Fetch API, or libraries like Axios. Consider using React's built-in useState and useEffect hooks to manage data fetching and rendering.

Conditional Rendering:

EJS templates often contain conditional rendering based on server-side variables. In React, you can achieve similar conditional rendering using JavaScript expressions within JSX or by using the ternary operator (condition ? trueRender : falseRender).

Loops and Iteration:

Replace EJS loops (such as <% for (let item of items) { %>) with JavaScript map() function or other array iteration methods in JSX.

Layouts and Partials:

EJS templates sometimes use layouts and partials to achieve a consistent structure. In React, you can use component composition to achieve a similar result. Break down your UI into reusable components and assemble them to form the desired layout.

Transferring Helpers and Utilities:

If your EJS templates use utility functions or custom helpers, you might need to adapt or rewrite them for use in React. Consider creating standalone utility functions or integrating them as part of your React components.

Localization and Internationalization:

If your EJS templates handle localization and internationalization, you'll need to implement similar functionality in React. Consider using libraries like react-intl to handle language-specific content.

Form Handling:

EJS templates may include forms for user input. In React, you can create controlled forms by maintaining form state using the useState hook and handling form submissions with event handlers.

External Libraries and Plugins:

If your EJS templates rely on external JavaScript libraries or plugins, you'll need to find equivalent React-compatible libraries or components to achieve the same functionality.


Write tests for your React components using testing libraries like Jest and React Testing Library. Test various scenarios, including rendering, data handling, and user interactions.

Performance Optimization:

Use React's performance optimization tools like React.memo, useMemo, and useCallback to optimize re-renders and improve the overall performance of your application.

Learning and Resources:

If you're new to React, take some time to learn the basics of JSX syntax, component lifecycle, state management, and hooks. There are plenty of online tutorials, documentation, and courses available to help you get started. If you're new to React, take some time to learn the basics of JSX syntax, component lifecycle, state management, and hooks. There are plenty of online tutorials, documentation, and courses available to help you get started.


EJS templates might be part of a multi-page application with different routes. In React, you can use a routing library like React Router to handle navigation and rendering different components based on URL paths.

Context API and State Management:

For global state management, consider using React's Context API or a state management library like Redux. This allows you to share states across components without the need for excessive prop drilling.

Error Handling:

Plan how you will handle errors and edge cases in your React application. Use try-catch blocks for error handling, and consider implementing error boundaries to prevent crashes from affecting the entire application.

Migrating Step-by-Step:

If your application is large, consider migrating gradually. You can start by converting one or a few pages to React, integrating them with the existing EJS-based pages. This approach allows you to maintain functionality while incrementally converting the application.

Documentation and Communication:

Document the conversion process, decisions made, and any challenges faced. This will be helpful for your team and future developers working on the project. Communicate with your team to ensure a smooth transition and to address any questions or concerns.

Performance Testing:

As you complete the conversion, perform thorough performance testing to ensure that your React application performs as expected, especially in terms of loading times and responsiveness.

Cross-Browser Compatibility:

Test your React application across different browsers to ensure cross-browser compatibility. React typically supports modern browsers, but you might need to make adjustments for older ones.

User Experience and Responsiveness:

While converting, pay attention to the user experience and responsiveness of your application. Ensure that the converted React components provide a smooth and consistent user interface.

Code Review:

Conduct thorough code reviews to catch any issues or inconsistencies introduced during the conversion process. This will help maintain code quality and ensure that best practices are followed.


Update your deployment process to accommodate the new React-based code. Make sure your build scripts, deployment pipelines, and server configurations are adjusted as needed.

Training and Support:

If your team is new to React, provide training and support to help them understand React concepts and best practices. Share resources, tutorials, and guidelines to facilitate a smooth transition.

Third-Party Integrations:

If your EJS application integrates with third-party services or APIs, ensure that those integrations are adapted and tested in your new React application. Adjust any API calls, authentication mechanisms, or data processing as needed.

SEO Considerations:

When transitioning from server-side rendering (SSR) in EJS to React, consider SEO implications. React applications can be rendered on the server using tools like Next.js or Gatsby to ensure that search engines can index your content effectively.

Code Style and Guidelines:

Establish consistent code style and guidelines for your React project. This helps maintain readability, consistency, and collaboration among developers.

Continuous Integration and Deployment (CI/CD):

Update your CI/CD pipelines to include the new React-based build process. Ensure that automated tests, linting, and deployment procedures are set up for the React codebase.

Version Control:

Properly manage version control during the transition. Consider creating a new branch for the React conversion to keep the existing EJS-based code intact while you work on the migration.

User Acceptance Testing (UAT):

Before fully deploying the converted React application, conduct user acceptance testing to ensure that all functionality is working as expected and that the user experience meets requirements.

Monitor and Optimize:

After deploying the React application, continuously monitor its performance, user engagement, and any potential issues. Use tools like performance monitoring, error tracking, and analytics to optimize the application over time.

Documentation Updates:

Update your project documentation, including user guides, API documentation, and any other relevant resources, to reflect the changes made during the conversion process.

Remember, converting from EJS to React is not just a technical process; it involves understanding the fundamental differences between the two technologies and adapting your approach to building user interfaces. With careful planning, thorough testing, and effective communication, you can successfully convert your EJS-based application to a modern and dynamic React-based application.

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