How to read an external local JSON file in JavaScript?
In JavaScript, there are several ways to read external local JSON files. Below, I will introduce each method with specific examples.1. Using Fetch APIThe most modern and common approach is to use the Fetch API. Fetch API provides a straightforward and modern interface for asynchronously fetching resources. Assume we have a local file named ; we can read it as follows:This method is simple and compatible with modern browsers.2. Using XMLHttpRequest (Older Method)Before the Fetch API was introduced, XMLHttpRequest was the primary method for asynchronous requests. Although it is not recommended for new development, understanding it can be useful for maintaining older code:3. Using Third-Party Libraries (e.g., jQuery)If your project already uses jQuery, you can leverage it to simplify the request:This method is simple but requires the jQuery library.4. Reading Methods in Node.js EnvironmentIf you are in a Node.js environment, you can use the built-in (File System) module to read local JSON files:This is the standard approach for reading files in Node.js.SummaryIn real-world development, the choice of method depends on your specific requirements and environment. For modern browser environments, it is recommended to use the Fetch API due to its simplicity and modern API design. If working in a Node.js environment, using the module is the most common practice. I hope these examples are helpful for your project!