# session.Session.setEnvironment

- **Module:** session.Session
- **Package:** @libtmux/libtmux
- **Language:** TypeScript
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ts/blob/2cb93308200da38a26b59876618116850f110607/packages/libtmux/src/session.ts#L219
- **Page:** https://libtmux.org/reference/ts/session-session-setenvironment/

```
session.Session.setEnvironment(name: : string, value: : string, options: : SetEnvironmentOptions) -> Promise<void>
```

Set a variable in this session's environment.

## Example

```ts
await session.setEnvironment("EDITOR", "vim");
```