How to Use Theta.js with Node.js

Learn how to integrate `Theta.js` with your Node.js applications efficiently, solving common issues like "fetch is undefined." Follow this guide for a smooth implementation! --- This video is based on the question https://stackoverflow.com/q/70409778/ asked by the user 'Mo J' ( https://stackoverflow.com/u/17690336/ ) and on the answer https://stackoverflow.com/a/70413096/ provided by the user 'Gunesh Shanbhag' ( https://stackoverflow.com/u/5235168/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Theta js. How use it with Node JS Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- How to Use Theta.js with Node.js: A Step-by-Step Guide If you're developing a Node.js application and want to incorporate Theta.js for managing Theta Token wallets and transactions, you might run into some snags—one of the most common being the error: “fetch is undefined.” This can be frustrating when you're trying to get transaction data. But not to worry! This guide will guide you through using Theta.js seamlessly with Node.js. Understanding the Issue When you try to use Theta.js in a Node.js application, the framework relies on the fetch API to make network requests. However, the fetch function is not available in the Node environment out-of-the-box; it's primarily a web-based API. Therefore, when you attempt to call a function that requires fetch, you will see an error indicating that fetch is undefined. Additionally, you may have attempted adding libraries like node-fetch to solve this problem without success. The key is to ensure that the fetch method is available in the global scope of your Node.js application. Step-by-Step Solution Step 1: Install node-fetch If you haven't already installed the node-fetch library, start by doing so. This library works similarly to the fetch API available in the browser, but is designed for use in Node.js. You can install it using npm by running the following command in your terminal: [[See Video to Reveal this Text or Code Snippet]] Step 2: Import and Assign fetch to Global Scope To make fetch available globally, you need to import node-fetch and assign it to the globalThis.fetch variable. This step is crucial because Theta.js relies on fetch being defined in the global context. Here's how you do it: [[See Video to Reveal this Text or Code Snippet]] By adding this line to your application, you ensure that any subsequent calls to Theta.js will have access to the fetch method, preventing the "fetch is undefined" error. Step 3: Using Theta.js Once you've set up fetch, you can now proceed to use Theta.js seamlessly for your wallet management and transaction queries. Here’s a brief example to illustrate how you might use Theta.js after setting up fetch: [[See Video to Reveal this Text or Code Snippet]] Conclusion Using Theta.js in your Node.js applications becomes straightforward once you resolve the fetch issue. By importing node-fetch and setting it as a global variable, you can effectively make API calls without encountering errors. This guide should help you navigate the common challenges and integrate the functionalities of Theta.js into your Node.js projects with ease. Now, you're one step closer to harnessing the full potential of Theta.js in your applications. Happy coding!