Assembly Cloud using JavaScript
Try our API using this user interface will give a sample output. Moreover, it will also help you to evaluate the results.
Building an automatic cloud-based solution using Vanilla JavaScript, specifically with XMLHttpRequest and the Fetch API, to assemble spreadsheet files with external datasource inputs like JSON, XML, or other structured formats, offers a streamlined and accessible approach to data integration within modern software workflows. This solution is ideal for lightweight web applications, client-side integrations, and environments where minimizing dependencies is essential. Spreadsheet files often need to be enriched with external data-such as reference tables, lookup values, or dynamic datasets-to support analytics, reporting, or machine learning pipelines. By leveraging native JavaScript capabilities, developers can create a responsive, browser-compatible system that merges spreadsheet content in real time, without relying on external libraries or server-heavy logic.
In essence, this Vanilla JavaScript solution provides a nimble, cloud-compatible method for automating the assembly of spreadsheet files with datasource inputs. It empowers developers to build fast, secure, and scalable data workflows using only native browser technologies. Whether embedded in a web portal, integrated into a SaaS platform, or used as a standalone tool, this system ensures that spreadsheet data is enriched, consistent, and ready for action-without the manual effort.
Key Features
A key feature of this automatic cloud solution is its use of Vanilla JavaScript, specifically XMLHttpRequest and the Fetch API, to interact directly with remote APIs-without relying on wrappers, SDKs, or third-party drivers. This approach ensures lightweight, browser-native execution that's easy to embed into any web-based workflow. With Fetch, developers can send spreadsheet and datasource files as Blob or FormData objects to cloud endpoints for assembly, then handle the response asynchronously using Promises or async/await. For environments requiring legacy support or synchronous control, XMLHttpRequest provides a robust alternative, allowing fine-grained control over request headers, response types, and event listeners. This dual capability ensures compatibility across modern and older platforms while maintaining full transparency over how data is transmitted and received.
The solution supports a wide range of spreadsheet formats-including CSV, TSV, Excel, and Apple Numbers-by routing each file type through a tailored processing pipeline. Datasource files such as JSON or XML are parsed and mapped to spreadsheet structures using native JavaScript logic. For complex formats like Excel and Numbers, the system calls cloud-based transformation APIs to convert them into intermediate formats, enabling seamless merging with external data. This modular design allows the system to handle diverse formats without installing external libraries or drivers. Combined with real-time feedback, secure file validation, and seamless integration into broader workflows, the solution offers a fast, scalable, and dependency-free method for automating spreadsheet assembly.
Live Demos
You can try the API using the Javascript app
