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deno check

Type-check a program without execution.

Command Jump to heading

deno check [OPTIONS] <FILE> - Download and type-check FILE

Synopsis Jump to heading

deno check [--import-map <FILE>] [--no-remote] [-q|--quiet] [--no-npm] 
[--node-modules-dir[=<node-modules-dir>]] [--vendor[=<vendor>]]
[-c|--config <FILE>] [--no-config] [-r|--reload[=<CACHE_BLOCKLIST>...]]
[--lock [<FILE>]] [--lock-write] [--no-lock] [--cert <FILE>] [--all] <FILE>

deno check -h|--help

Description Jump to heading

Type-check without execution.

const x: string = 1 + 1n;

deno check example.ts

Arguments Jump to heading

FILE - The module entrypoint.

The module entrypoint can be a local file or a remote URL.

Options Jump to heading

  • --import-map <FILE>

    Load import map file from local file or remote URL. Docs: https://docs.deno.com/runtime/manual/basics/import_maps Specification: https://wicg.github.io/import-maps/ Examples: https://github.com/WICG/import-maps#the-import-map

  • --no-remote

    Do not resolve remote modules

  • -q, --quiet

    Suppress diagnostic output

  • --no-npm

    Do not resolve npm modules

  • --node-modules-dir[=<node-modules-dir>]

    Enables or disables the use of a local node_modules folder for npm packages

    [possible values: true, false]

  • --vendor[=<vendor>]

    UNSTABLE: Enables or disables the use of a local vendor folder for remote modules and node_modules folder for npm packages

    [possible values: true, false]

  • -c, --config <FILE>

    The configuration file can be used to 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. See https://deno.land/manual@v1.41.3/getting_started/configuration_file

  • --no-config

    Disable automatic loading of the configuration file

  • -r, --reload[=<CACHE_BLOCKLIST>...]

    Reload source code cache (recompile TypeScript).

    The CACHE_BLOCKLIST is a comma separated list of arguments passed to the --reload option. E.g. --reload=https://deno.land/std/fs/utils.ts,https://deno.land/std/fmt/colors.ts

  • --lock [<FILE>]

    Check the specified lock file. If value is not provided, defaults to "deno.lock" in the current working directory.

  • --lock-write

    Force overwriting the lock file

  • --no-lock

    Disable auto discovery of the lock file

  • --cert <FILE>

    Load the certificate from a PEM encoded file

  • --all Type-check all code, including remote modules and npm packages

    If the value of '--check=all' is supplied, diagnostic errors from remote modules will be included.

  • -h, --help

    Print help (see a summary with '-h')

Examples Jump to heading

  • Type check a local file

    deno check example.ts