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

--compact

Output lint result in compact format.

--fix

Fix any linting errors for rules that support it.

--ignore

Ignore linting particular source files.

--json

Output lint result in JSON format.

--rules

List available rules.

--rules-exclude

Exclude lint rules.

--rules-include

Include lint rules.

--rules-tags

Use set of rules with a tag.

Options

--config

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

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

Disable automatic loading of the configuration file.

File watching options

--no-clear-screen

Do not clear terminal screen when under watch mode.

--watch

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

--watch-exclude

Exclude provided files/patterns from watch mode.

Available rules

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

Ignore directives

Files

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

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 {
  // ...
}