Lint JavaScript/TypeScript source code.

deno lint

deno lint myfile1.ts myfile2.js

Print result as JSON:

deno lint --json

Read from stdin:

cat file.ts | deno lint -

cat file.ts | deno lint --json -

List available rules:

deno lint --rules

To ignore specific diagnostics, you can write an ignore comment on the preceding line with a rule name (or multiple):

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

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

To ignore linting on an entire file, you can add an ignore comment at the top of the file:

// deno-lint-ignore-file

Output lint result in compact format.

Fix any linting errors for rules that support it.

Ignore linting particular source files.

Output lint result in JSON format.

List available rules.

Exclude lint rules.

Include lint rules.

Use set of rules with a tag.

Allow importing from remote hosts. Optionally specify allowed IP addresses and host names, with ports as necessary. Default value: deno.land:443,jsr.io:443,esm.sh:443,cdn.jsdelivr.net:443,raw.githubusercontent.com:443,user.githubusercontent.com:443.

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

Deny importing from remote hosts. Optionally specify denied IP addresses and host names, with ports as necessary.

Specify the file extension to lint when reading from stdin.For example, usejsx to lint JSX files ortsx 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.

Disable automatic loading of the configuration file.

Don't return an error code if no files were found.

Do not clear terminal screen when under watch mode.

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

Exclude provided files/patterns from watch mode.

// deno-lint-ignore-filefunctionfoo():any{// ...}

// deno-lint-ignore-file -- reason for ignoringfunctionfoo():any{// ...}

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license./** * Some JS doc */// deno-lint-ignore-fileimport{ bar}from"./bar.js";functionfoo():any{// ...}

// deno-lint-ignore-file no-explicit-any no-emptyfunctionfoo():any{// ...}

// This is effective// deno-lint-ignore-file no-explicit-any no-empty// But this is NOT effective// deno-lint-ignore-file no-debuggerfunctionfoo():any{debugger;// not ignored!}

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

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

// deno-lint-ignore-file ban-unused-ignore no-explicit-any// `no-explicit-any` isn't used but you'll get no diagnostics because of ignoring// `ban-unused-ignore`console.log(42);