How do I enable the Deno extension in VS Code?

After installing the extension and Deno CLI, use the command palette (Ctrl+Shift+P) to run 'Deno: Enable' or set 'deno.enable' to true in settings. You may also need to configure the Deno path if it's not in your environment.

Deno VS Code extension vs built-in TypeScript support: which is better?

The Deno extension is better for Deno projects because it aligns with the CLI for module resolution and tooling, while VS Code's built-in support is optimized for Node.js or generic TypeScript. For mixed projects, you might need to toggle settings carefully.

Why isn't my Deno extension working in VS Code?

Common issues include not having Deno CLI installed, version incompatibilities per the compatibility table, or misconfigured paths in the 'deno.path' setting. Check the language server status via the 'Deno: Language Server Status' command for diagnostics.

How to configure Deno formatter in VS Code?

Set 'editor.defaultFormatter' to 'denoland.vscode-deno' in your settings.json, and ensure 'deno.enable' is true. The formatter respects your deno.json config, but note it doesn't support format-on-paste or format-on-type.

Can I use the Deno extension with Node.js projects?

It's not recommended, as enabling it disables VS Code's built-in services and uses Deno's module resolution, which can break Node.js-specific imports and tooling. Use it only for Deno-based workspaces or configure per-folder settings.

Does the Deno extension support import maps?

Yes, you can specify import maps via the 'deno.importMap' setting or in deno.json files, allowing module relocation as per Deno's standards, similar to using --import-map on the CLI.

Open-Awesome

vscode-deno

MITTypeScript3.53.0

Official Visual Studio Code extension for Deno, providing language server integration, type checking, linting, and formatting.

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1.5k stars169 forks0 contributors

What is vscode-deno?

Deno for Visual Studio Code is the official VS Code extension that adds comprehensive support for the Deno runtime. It enables developers to write, test, and debug Deno applications directly in VS Code with features like type checking, linting, formatting, and module resolution aligned with the Deno CLI.

Target Audience

Developers using Deno for JavaScript or TypeScript projects who want integrated tooling within Visual Studio Code.

Value Proposition

It provides a seamless, consistent development experience by leveraging Deno's native language server, ensuring editor behavior matches the Deno CLI and eliminating configuration conflicts with other TypeScript tooling.

Overview

Visual Studio Code plugin for Deno

Use Cases

Best For

Developing Deno applications in Visual Studio Code
Ensuring consistent type checking and linting with Deno CLI
Automatically caching remote dependencies during development
Running and debugging Deno tests directly from the editor
Formatting JavaScript, TypeScript, and JSON files with Deno's formatter
Using import maps and Deno configuration files in VS Code

Not Ideal For

Teams working on Node.js or browser-based JavaScript projects without Deno integration
Developers using editors other than Visual Studio Code
Projects requiring format-on-paste or format-on-type capabilities, as the README notes these are unsupported
Environments where installing or updating the Deno CLI executable is restricted or impractical

Pros & Cons

Pros

Seamless CLI Alignment

It replaces VS Code's built-in TypeScript/JavaScript services with Deno's language server, ensuring editor behavior matches the Deno CLI exactly, which eliminates toolchain inconsistencies.

Integrated Tooling Suite

The extension bundles Deno's linting, formatting, and module resolution directly into VS Code, providing a cohesive development experience without external configuration.

Efficient Dependency Management

It caches remote modules using Deno's strategy and offers quick fixes to fetch dependencies, streamlining development by reducing manual cache commands.

Enhanced Testing Workflow

With Testing Code Lens, developers can run Deno tests inline from the editor, boosting productivity by avoiding context switches to the terminal.

Cons

Mandatory Deno Installation

The extension requires Deno CLI v1.13.0 or later to be installed and accessible, adding setup complexity and dependency management overhead for users.

Incomplete Formatting Features

As admitted in the README, it lacks format-on-paste and format-on-type capabilities, which can hinder workflows relying on real-time code formatting.

Version Compatibility Hassles

The compatibility table shows strict version matching between Deno CLI and the extension, risking broken features or instability if versions are mismatched.

Potential Tooling Conflicts

Enabling the extension disables VS Code's built-in JavaScript/TypeScript services, which can disrupt mixed projects or lead to confusion in non-Deno workspaces.

Frequently Asked Questions

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