I often find myself wondering about the best place to store types and interfaces related to a specific class in TypeScript. There are numerous of them used throughout the code base, and I would rather not constantly import them but have them available globally like default primitives such as string and number.
While the use of global types is not typically recommended, it is possible to implement them in a straightforward manner. Simply create a `.ts` file without any `import/export` statements (essentially making it non-module). Anything within this file will then be accessible globally in other TypeScript files.
All you need to do is include these `.ts` files in the compilation process - one method is by using the `include` property in the `tsconfig.json` file
{
"compilerOptions": {
//...
},
"include": [
"src/**/*" // or any other desired path
]
}
To make modules accessible in the global scope, you can create a type file called globals.d.ts with the following structure:
declare global {
}
Any types declared within this file will be available globally. Simply ensure that the file is included by TypeScript, as TypeScript automatically includes all files with extensions .ts, .d.ts, and .tsx.
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