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The deno check command type-checks TypeScript and JavaScript files without executing them.

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Usage

deno check [OPTIONS] [FILES]...

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Description

Download and type-check files without execution. Unless --reload is specified, this command will not re-download already cached dependencies.

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Flags

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--all
boolean
Type-check all code, including remote modules and npm packages
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--doc
boolean
Type-check code blocks in JSDoc as well as actual code
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--doc-only
boolean
Type-check code blocks in JSDoc and Markdown only
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--check-js
boolean
Enable type-checking of JavaScript files (equivalent to compilerOptions.checkJs: true)
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--import-map
string
Load import map file
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--lock
string
Check the specified lock file
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--node-modules-dir
boolean
Enables or disables the use of a local node_modules folder for npm packages
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--no-remote
boolean
Do not resolve remote modules
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--no-npm
boolean
Do not resolve npm modules
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--reload
boolean | string
Reload source code cache (recompile TypeScript)
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--config
string
Specify the configuration file
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--no-config
boolean
Disable automatic loading of the configuration file
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--allow-import
string
Allow importing from specified hosts
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--deny-import
string
Deny importing from specified hosts

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Examples

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Type-check a file

deno check main.ts

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Type-check current directory

When no files are specified, checks the current directory: 
deno check

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Type-check with all dependencies

Include remote modules and npm packages: 
deno check --all main.ts

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Type-check JavaScript files

deno check --check-js script.js

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Type-check JSDoc comments

Check type annotations in JSDoc: 
deno check --doc main.ts

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Type-check only documentation

Check code blocks in JSDoc and Markdown without checking the actual source: 
deno check --doc-only README.md

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Type-check multiple files

deno check src/main.ts src/utils.ts

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Type-check with import map

deno check --import-map=import_map.json main.ts

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