TypeScript: How to Properly Define a Recursive Type for Nested Objects Without Causing Stack Overflow Errors
I've looked through the documentation and I'm still confused about I'm stuck trying to I've been struggling with this for a few days now and could really use some help....... I'm trying to define a recursive type in TypeScript for a nested object structure that represents categories and subcategories, but I keep running into a Stack Overflow error during type checking. Here is a simplified version of what I'm trying to accomplish: ```typescript interface Category { id: number; name: string; subcategories?: Category[]; } ``` When I use this structure, I attempt to create a nested object like this: ```typescript const categories: Category = { id: 1, name: 'Electronics', subcategories: [ { id: 2, name: 'Computers', subcategories: [] }, { id: 3, name: 'Cameras', subcategories: [ { id: 4, name: 'DSLRs', subcategories: [] } ] } ] }; ``` The compiler seems to be able to handle this definition at first, but when I try to use this structure in a function that traverses the categories and logs their names, I get a runtime error that says "Maximum call stack size exceeded". Here’s the function I’m using: ```typescript function logCategoryNames(category: Category) { console.log(category.name); if (category.subcategories) { category.subcategories.forEach(logCategoryNames); } } ``` When I call this function: ```typescript logCategoryNames(categories); ``` it works fine for a flat structure, but when the depth of subcategories increases, it triggers the stack overflow error. I've also tried increasing the stack size in Node.js but that didn't help. Is there a better way to handle this recursion in TypeScript or a pattern I might be missing? Should I consider an alternative way to traverse nested objects without hitting this limitation? Any assistance would be greatly appreciated! My development environment is macOS. Any ideas what could be causing this? Any pointers in the right direction? For context: I'm using Typescript on Debian. Could this be a known issue? For reference, this is a production CLI tool. I'd really appreciate any guidance on this.