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deno lint
, linter
Command-line Usage
deno lint [OPTIONS] [files]...
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
Linting options Jump to heading
--compact
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Output lint result in compact format.
--fix
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Fix any linting errors for rules that support it.
--ignore
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Ignore linting particular source files.
--json
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Output lint result in JSON format.
--rules
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List available rules.
--rules-exclude
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Exclude lint rules.
--rules-include
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Include lint rules.
--rules-tags
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Use set of rules with a tag.
Options Jump to heading
--config
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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
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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
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Disable automatic loading of the configuration file.
File watching options Jump to heading
--no-clear-screen
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Do not clear terminal screen when under watch mode.
--watch
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Watch for file changes and restart process automatically. Only local files from entry point module graph are watched.
--watch-exclude
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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 {
// ...
}