There are several env vars that control how Deno behaves:

defaults to $HOME/.cache/deno but can be set to any path to control where generated and cached source code is written and read to.

NO_COLOR will turn off color output if set. See . User code can test if NO_COLOR was set without having --allow-env by using the boolean constant Deno.noColor.

You can generate completion script for your shell using the deno completions <shell> command. The command outputs to stdout so you should redirect it to an appropriate file.

The supported shells are:

• zsh
• fish
• powershell
• elvish

Example (bash):

Example (zsh without framework):

mkdir ~/.zsh # create a folder to save your completions. it can be anywhere
deno completions zsh > ~/.zsh/_deno

and restart your terminal. note that if completions are still not loading, you may need to run rm ~/.zcompdump/ to remove previously generated completions and then compinit to generate them again.

Example (zsh + oh-my-zsh) [recommended for zsh users] :

mkdir ~/.oh-my-zsh/custom/plugins/deno

After this add deno plugin under plugins tag in ~/.zshrc file. for tools like antigen path will be ~/.antigen/bundles/robbyrussell/oh-my-zsh/plugins and command will be antigen bundle deno and so on.

Example (Powershell):

This will be create a Powershell profile at $HOME\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1 by default, and it will be run whenever you launch the PowerShell.

Because Deno requires the use of file extensions for module imports and allows http imports, and most editors and language servers do not natively support this at the moment, many editors will throw errors about being unable to find files or imports having unnecessary file extensions.

The community has developed extensions for some editors to solve these issues:

VS Code

JetBrains IDEs

Support for JetBrains IDEs is available through the Deno plugin.

For more information on how to set-up your JetBrains IDE for Deno, read on YouTrack.

Vim and NeoVim

Vim works fairly well for Deno/TypeScript if you install (intellisense engine and language server protocol).

After CoC is installed, from inside Vim, run:CocInstall coc-tsserver and :CocInstall coc-deno. To get autocompletion working for Deno type definitions run :CocCommand deno.types. Optionally restart the CoC server :CocRestart. From now on, things like gd (go to definition) and gr (goto/find references) should work.

Emacs

Emacs works pretty well for a TypeScript project targeted to Deno by using a combination of which is the canonical way of using TypeScript within Emacs and typescript-deno-plugin which is what is used by the .

To use it, first make sure that tide is setup for your instance of Emacs. Next, as instructed on the typescript-deno-plugin page, first in your project (npm init -y as necessary), then add the following block to your tsconfig.json and you are off to the races!

{
    "plugins": [
      {
        "name": "typescript-deno-plugin",
        "enable": true, // default is `true`
        "importmap": "import_map.json"
      }
    ]
  }

If you don’t see your favorite IDE on this list, maybe you can develop an extension. Our can give you some pointers on where to get started.