Easily accessing the project root directory from any file in Typescript and Javascript

Written by Francisco Gonzalez

Published on: 2024-02-05

Setup for root directory

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Problem Statement

In TypeScript projects, consistently accessing the project’s root directory from various subdirectories can be challenging. Relative paths may vary depending on the current file’s location, leading to potential issues in path management.

Solution

We will modify the app.ts file in the root of your TypeScript project to export a basePath constant. This constant will hold the absolute path to the project’s root directory. By importing basePath in any part of the application, you can easily reference the root directory.

Step-by-Step Guide

1. Modifying the app.ts File

Open your app.ts file, which is typically in the root of your TypeScript project. Add the following line of code at the end of the file:

import path from 'path';
// Here you can play with '..' depends where you locate the following line
export const basePath: string = path.join(path.resolve(__dirname), "..");

This line exports a basePath constant, which computes the absolute path to the project’s root directory.

2. Using basePath in Your Application

You can now import the basePath variable in any TypeScript file within your project to reference the root directory. For example:

import { basePath } from './app';

// Use basePath to reference any file or directory from the project root
const someFilePath = path.join(basePath, 'path/to/your/file');

Conclusion

By adding a single line of code to the app.ts file and exporting basePath, we have created a straightforward and efficient way to access the project’s root directory from anywhere in our TypeScript application. This method enhances the manageability and readability of our code, especially when dealing with file paths.