deno lint, linter

deno lint [OPTIONS] [files]...

deno lint

deno lint myfile1.ts myfile2.js

deno lint --json

cat file.ts | deno lint -

cat file.ts | deno lint --json -

deno lint --rules

// deno-lint-ignore no-explicit-any

// deno-lint-ignore require-await no-empty

// deno-lint-ignore-file

Linting options Jump to heading#

--compact Jump to heading#

Output lint result in compact format.

--fix Jump to heading#

Fix any linting errors for rules that support it.

--ignore Jump to heading#

Ignore linting particular source files.

--json Jump to heading#

Output lint result in JSON format.

--rules Jump to heading#

List available rules.

--rules-exclude Jump to heading#

Exclude lint rules.

--rules-include Jump to heading#

Include lint rules.

--rules-tags Jump to heading#

Use set of rules with a tag.

Options Jump to heading#

--config Jump to heading#

Short flag: -c

Configure different aspects of deno including TypeScript, linting, and code formatting Typically the configuration file will be called deno.json or deno.jsonc and automatically detected; in that case this flag is not necessary.

--ext Jump to heading#

Specify the file extension to lint when reading from stdin.For example, use jsx to lint JSX files or tsx for TSX files.This argument is necessary because stdin input does not automatically infer the file type.Example usage: cat file.jsx | deno lint - --ext=jsx.

--no-config Jump to heading#

Disable automatic loading of the configuration file.

File watching options Jump to heading#

--no-clear-screen Jump to heading#

Do not clear terminal screen when under watch mode.

--watch Jump to heading#

Watch for file changes and restart process automatically. Only local files from entry point module graph are watched.

--watch-exclude Jump to heading#

Exclude provided files/patterns from watch mode.

Available rules Jump to heading#

For a complete list of supported rules, visit the deno_lint rule documentation.

Ignore directives Jump to heading#

Files Jump to heading#

To ignore the whole file, a // deno-lint-ignore-file directive should placed at the top of the file:

// deno-lint-ignore-file

function foo(): any {
  // ...
}

or

// deno-lint-ignore-file -- reason for ignoring

function foo(): any {
  // ...
}

The ignore directive must be placed before the first statement or declaration:

// Copyright 2020 the Deno authors. All rights reserved. MIT license.

/**
 * Some JS doc
 */

// deno-lint-ignore-file

import { bar } from "./bar.js";

function foo(): any {
  // ...
}

You can also ignore certain diagnostics in the whole file:

// deno-lint-ignore-file no-explicit-any no-empty

function foo(): any {
  // ...
}

Diagnostics Jump to heading#

To ignore certain diagnostics, the // deno-lint-ignore <rules...> directive should be placed before the targeted line. Specifying the ignored rule name is required:

// deno-lint-ignore no-explicit-any
function foo(): any {
  // ...
}

// deno-lint-ignore no-explicit-any explicit-function-return-type
function bar(a: any) {
  // ...
}

You can also specify the reason for ignoring the diagnostic:

// deno-lint-ignore no-explicit-any -- reason for ignoring
function foo(): any {
  // ...
}