# server.Server.setEnvironment

- **Module:** server
- **Package:** libtmux
- **Language:** TypeScript
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ts/blob/073b9d7dedad900bff6f5ec0ea47794e40225870/packages/libtmux/src/server.ts#L1246
- **Page:** https://libtmux.org/en/ts/latest/reference/server-server-setenvironment/

```
setEnvironment(
  name: string,
  value: string,
  options?: SetEnvironmentOptions,
): Promise<void>
```

Set a variable in the server's global environment.

## Examples

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

## Parameters

- `name` (`string`)
- `value` (`string`)
- `options?` (`SetEnvironmentOptions`)

## tmux command

The tmux commands behind `setEnvironment`.

- [`set-environment`](/en/tmux/latest/manual/set-environment/)

## tmux C API

The C declarations in tmux that implement these commands.

- [`cmd_set_environment_entry`](/en/tmux/latest/reference/c-variable-cmd_set_environment_entry/) (attribute)
- [`cmd_set_environment_exec`](/en/tmux/latest/reference/c-function-cmd-set-environment-c-cmd_set_environment_exec/) (function)

## Guides

Pages that discuss `setEnvironment`.

- [Environment](/en/ts/latest/topics/environment/)

## In other ports

Set a variable in the server's environment

| Language | Equivalent |
| --- | --- |
| Python | [`libtmux.Server.set_environment`](/en/py/latest/reference/libtmux-server-set_environment/) (method) |
| Ruby | [`LibTmux::Server#set_environment`](/en/ruby/latest/reference/libtmux-server-set_environment/) (method) |
| Lua | [`libtmux.Server:set_environment`](/en/lua/latest/reference/libtmux-server-set_environment/) (method) |
| Rust | [`server.Server.set_environment`](/en/rs/latest/reference/server-server-set_environment/) (method) |
| Go | [`tmux.Server.SetEnvironment`](/en/go/latest/reference/tmux-server-setenvironment/) (method) |
| Java | no equivalent on `Server` |
| C# | no equivalent on `Server` |
| C++ | no equivalent on `Server` |
| Swift | [`Server.setEnvironment(_:to:in:)`](/en/swift/latest/reference/server-setenvironment(_-to-in-)/) (method) |

No equivalent is recorded in PowerShell, Julia, Elixir, Kotlin, Scala or F#.