.env.development.local 2021 Jun 2026

The syntax is standard KEY=VALUE .

To avoid this pitfall, follow these best practices with Vite:

Enter the specific, powerful, and often misunderstood file: .

Both developers have their personalized setups, and neither interferes with the other's workflow. .env.development.local

Environment files are only read when the local server boots up. If you add a variable to .env.development.local , you must stop ( Ctrl + C ) and restart your development server.

Now your local build uses a local mock server, while the team's default uses a public test API.

(with "use client" directive):

The .env.development.local file is a local configuration file used to define environment variables exclusively for a developer's local machine during the development phase.

The primary power of .env.development.local is its ability to solve specific, localized development problems without polluting the shared codebase. Here are a few examples:

Because .env.development.local is last in the chain for local development, it is the final authority on what variables are loaded [3jop]. How to Use .env.development.local 1. Create the File The syntax is standard KEY=VALUE

One of the most specific—and often misunderstood—is .env.development.local . This post breaks down exactly what it is, why it exists, and how to use it like a pro. What Exactly is .env.development.local ?

They then edit .env.development.local with their actual local values.