Use when configuring environment variables, using .env files, creating custom modes, or debugging env variable issues. Prevents exposing secrets by omitting the VITE_ prefix and misconfiguring .env file precedence. Covers import.meta.env built-ins, .env file loading order, VITE_ prefix requirement,
Use when configuring environment variables, using .env files, creating custom modes, or debugging env variable issues. Prevents exposing secrets by omitting the VITE_ prefix and misconfiguring .env file precedence. Covers import.meta.env built-ins, .env file loading order, VITE_ prefix requirement, dotenv-expand, custom modes, NODE_ENV vs mode, ImportMetaEnv TypeScript, HTML %VAR%, and loadEnv().