```js
// @noErrors
import { defineEnvVars } from '@sveltejs/kit/env';
```

## defineEnvVars

Utility for defining [environment variables](/docs/kit/environment-variables),
which are made available via `$app/env/public` and `$app/env/private`.

```js
// @errors: 7031
import { defineEnvVars } from '@sveltejs/kit/env';
import * as v from 'valibot';

export const variables = defineEnvVars({
	API_URL: {
		schema: v.pipe(v.string(), v.url())
	},
	PORT: {
		schema: (value) => {
			if (value === undefined) return 3000;
			const port = Number(value);
			if (!Number.isInteger(port)) throw new Error('PORT must be an integer');
			return port;
		}
	}
});
```

<div class="ts-block">

```dts
function defineEnvVars<
	T extends Record<string, EnvVarConfig<any>>
>(variables: T): DefinedEnvVars<T>;
```

</div>