hasEnv

The hasEnv function checks if an environment variable exists in the runtime environment.

Syntax

hasEnv(key: string): boolean;

Parameters

Name	Type	Description
key	string	The name of the environment variable to check

Returns

Type	Description
boolean	true if the environment variable exists, false otherwise

Examples

hasEnv("NODE_ENV");
// => true or false

hasEnv("INEXISTENTE");
// => false

Notes

• Supports Node.js and Deno environments.
• Useful for checking the existence of environment variables before accessing them.

References

• https://nodejs.org/api/process.html#processenv