Node.js developers often lean towards Module Requiring over Dependency Injection (DI) for several reasons, which are rooted in the nature of JavaScript and the design patterns that have evolved within the Node.js ecosystem.
Simplicity and Convenience: Module Requiring is straightforward and built into Node.js via the require() function. It allows developers to easily include modules without the need for additional libraries or frameworks to manage dependencies[3][10].
Caching Mechanism: Node.js caches the required modules, so subsequent calls to require() with the same path will not reload the module but will return the cached export. This improves performance and ensures consistency across the application[3].
CommonJS Standard: Node.js uses the CommonJS module standard, which is designed around the require() function and module.exports. This standard is familiar to many JavaScript developers and is considered the traditional way to handle modularization in Node.js[11].
Functional Programming Paradigm: JavaScript has a strong inclination towards functional programming, and the use of classes and objects (which are often associated with DI) is not as central to JavaScript as it is to other languages like Java or C#. Therefore, the module pattern fits naturally with the functional style that many JavaScript developers prefer[14].
Tooling and Ecosystem: The Node.js ecosystem has a wealth of tools that work well with the Module Requiring pattern, such as bundlers and task runners. These tools have been optimized to work with the require() function, making it the path of least resistance for many developers[6][10].
Testing and Mocking Libraries: While DI is often touted for its testability benefits, Node.js has powerful testing and mocking libraries like Jest, Sinon, and proxyquire that allow developers to stub or mock dependencies without needing a DI framework. This reduces the need for DI as a means to achieve testable code[14].
Less Overhead: Using DI frameworks can introduce additional complexity and overhead. For many Node.js applications, especially smaller ones, the simplicity of Module Requiring is more appealing and sufficient for their needs[2].
JavaScript's Dynamic Nature: JavaScript's dynamic nature allows for certain patterns that can circumvent the need for DI, such as modifying the module exports or using factory functions. This flexibility can reduce the perceived benefits of DI[12].
Community Practices: The Node.js community has a...
