Lovable and Zeplin integration: Step-by-Step Guide 2025

 

Creating the Zeplin Integration File

 

• Create a new folder in your Lovable project’s root called integrations.
• Inside the integrations folder, create a new file named zeplinIntegration.ts. This file will contain all TypeScript code to interact with Zeplin’s API.
• Paste the following code snippet into zeplinIntegration.ts. This code defines a helper class to fetch project data from Zeplin using your API key and project identifier:

  
  export class ZeplinIntegration {
    private apiKey: string;
    private projectId: string;
    private apiUrl: string = 'https://api.zeplin.io/v2';
  
    constructor(apiKey: string, projectId: string) {
      this.apiKey = apiKey;
      this.projectId = projectId;
    }
    public async getProjectDetails(): Promise {
      try {
        const response = await fetch(${this.apiUrl}/projects/${this.projectId}, {
          method: 'GET',
          headers: {
            'Authorization': Bearer ${this.apiKey},
            'Content-Type': 'application/json'
          }
        });
        if (!response.ok) {
          throw new Error(Zeplin API error: ${response.statusText});
        }
        return await response.json();
      } catch (error) {
        console.error('Error fetching Zeplin project details:', error);
        throw error;
      }
    }
  }
  

  
  

 

Configuring Zeplin API Credentials in Your Code

 

• Since Lovable does not support terminal installations, you need to add your Zeplin API key and project ID directly in your TypeScript code. You can create a configuration file.
• Create a new file in your project’s root named zeplinConfig.ts and add the following snippet:

  
  // Replace the placeholders with your actual Zeplin API key and project ID.
  export const ZEPPLINAPIKEY = 'YOURZEPLINAPI_KEY';
  export const ZEPPLINPROJECTID = 'YOURZEPPLINPROJECT_ID';
  

 

Integrating Zeplin Data into Your Lovable Application

 

• Open or create the main application file where you wish to use the Zeplin integration. This might be app.ts or similar depending on your project structure.
• Import the Zeplin integration and the credentials configuration. Then, instantiate the integration class and call its function. For example:

  
  import { ZeplinIntegration } from './integrations/zeplinIntegration';
  import { ZEPPLINAPIKEY, ZEPPLINPROJECTID } from './zeplinConfig';
  
  async function loadZeplinProjectData() {
    const zeplin = new ZeplinIntegration(ZEPPLINAPIKEY, ZEPPLINPROJECTID);
    try {
      const projectData = await zeplin.getProjectDetails();
      console.log('Zeplin Project Data:', projectData);
      // Integrate the project data into your Lovable UI components as needed.
    } catch (error) {
      // Handle any errors in fetching or processing the project data.
      console.error('Failed to load Zeplin project data:', error);
    }
  }
  // Call the function when your application initializes.
  loadZeplinProjectData();
  

  
  

 

Embedding Dependencies Without a Terminal

 

• Since Lovable doesn’t provide a terminal, dependencies must be inserted via code. The integration above uses the browser’s native fetch API. Ensure that your Lovable project uses an environment which supports TypeScript and the fetch API. If needed, add a TypeScript configuration file (tsconfig.json) to manage compiler settings.
• If you require polyfills for environments without native fetch support, add the polyfill script via a <script> tag in your HTML template. For example:

  
  <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/fetch.umd.min.js"></script>
  

 

Final Integration Testing and Usage

 

• Save all files and ensure that your Lovable project rebuilds or refreshes its modules automatically.
• Open the console in your application; on initialization, it should log the Zeplin project data retrieved from the API. This confirms that your integration is functioning correctly.
• If you wish to utilize the design data from Zeplin in your UI components, expand the code inside the loadZeplinProjectData function by calling functions that update your Lovable UI elements.