deno_lint
A blazing fast Rust crate for linting JavaScript and TypeScript code, powering Deno's linter and usable with Node.js.
What is deno_lint?
deno_lint is a Rust crate for linting JavaScript and TypeScript code, designed to be extremely fast and easy to use. It provides a core linting engine that powers Deno's built-in linter but can also be integrated into other tools like Node.js. The project solves the problem of slow linting in large codebases by leveraging Rust's performance.
JavaScript and TypeScript developers working on performance-sensitive projects, tooling engineers building custom linters, and teams using Deno or Node.js who want faster linting.
Developers choose deno_lint for its exceptional speed, zero-config setup for recommended rules, and flexibility as a Rust crate that can be embedded in various toolchains. Its performance benchmarks show it being significantly faster than ESLint.
Overview
Blazing fast linter for JavaScript and TypeScript written in Rust
Use Cases
Best For
- Linting large JavaScript/TypeScript codebases where performance matters
- Building custom linting tools or integrating linting into other Rust applications
- Deno projects needing fast, built-in linting
- Node.js projects via the @node-rs/deno-lint bindings
- Teams wanting ESLint-compatible rules without configuration overhead
- Tooling engineers creating fast developer experience tools
Not Ideal For
- Projects requiring extensive custom ESLint rules or plugins beyond the recommended sets
- Teams with complex, existing ESLint configurations that need full compatibility and auto-fix features
- IDEs or editors that rely on ESLint's complete API for real-time linting and integration
- Environments where Rust toolchain adoption is impractical or adds unnecessary complexity
Pros & Cons
Pros
Benchmarks in the README show deno_lint is over 100x faster than ESLint on the oak codebase, with runs measured in milliseconds versus seconds.
Supports ESLint and @typescript-eslint recommended rule sets out of the box, eliminating configuration overhead for common linting needs.
Can be used as a Rust crate for Deno or custom tools, and has Node.js bindings via @node-rs/deno-lint for seamless integration into Node.js workflows.
Written in Rust, ensuring memory safety and high performance, with examples like the standalone dlint binary demonstrating low-level control.
Cons
Only includes recommended rules from ESLint and @typescript-eslint, missing many community plugins and custom rules available in ESLint's extensive ecosystem.
Using deno_lint as a crate requires Rust toolchain setup, which can be a barrier for teams not familiar with Rust or preferring JavaScript-based tooling.
Compared to ESLint, deno_lint has fewer integrations, plugins, and community support, as noted in the roadmap for future development.
Open Source Alternative To
deno_lint is an open-source alternative to the following products:
Frequently Asked Questions
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