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/Deno 2

deno eval

Command line usage:

deno eval [OPTIONS] [CODE_ARG]...

Evaluate JavaScript from the command line.

deno eval "console.log('hello world')"

To evaluate as TypeScript:

deno eval --ext=ts "const v: string = 'hello'; console.log(v)"

This command has implicit access to all permissions.

Type checking options

`--check`

Enable type-checking. This subcommand does not type-check by default If the value of "all" is supplied, remote modules will be included. Alternatively, the 'deno check' subcommand can be used.

`--no-check`

Skip type-checking. If the value of "remote" is supplied, diagnostic errors from remote modules will be ignored.

Dependency management options

`--cached-only`

Require that remote dependencies are already cached.

`--frozen`

Error out if lockfile is out of date.

`--import-map`

Load import map file from local file or remote URL.

`--lock`

Check the specified lock file. (If value is not provided, defaults to "./deno.lock").

`--no-lock`

Disable auto discovery of the lock file.

`--no-npm`

Do not resolve npm modules.

`--no-remote`

Do not resolve remote modules.

`--node-modules-dir`

Sets the node modules management mode for npm packages.

`--reload`

Short flag: -r

Reload source code cache (recompile TypeScript) no value Reload everything jsr:@std/http/file-server,jsr:@std/assert/assert-equals Reloads specific modules npm: Reload all npm modules npm:chalk Reload specific npm module.

`--vendor`

Toggles local vendor folder usage for remote modules and a node_modules folder for npm packages.

Options

`--allow-scripts`

Allow running npm lifecycle scripts for the given packages Note: Scripts will only be executed when using a node_modules directory (--node-modules-dir).

`--cert`

Load certificate authority from PEM encoded file.

`--conditions`

Use this argument to specify custom conditions for npm package exports. You can also use DENO_CONDITIONS env var. .

`--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.

`--env-file`

Load environment variables from local file Only the first environment variable with a given key is used. Existing process environment variables are not overwritten, so if variables with the same names already exist in the environment, their values will be preserved. Where multiple declarations for the same environment variable exist in your .env file, the first one encountered is applied. This is determined by the order of the files you pass as arguments.

`--ext`

Set content type of the supplied file.

`--location`

Value of globalThis.location used by some web APIs.

`--no-config`

Disable automatic loading of the configuration file.

`--preload`

A list of files that will be executed before the main module.

`--print`

Short flag: -p

print result to stdout.

`--seed`

Set the random number generator seed.

`--v8-flags`

To see a list of all available flags use --v8-flags=--help Flags can also be set via the DENO_V8_FLAGS environment variable. Any flags set with this flag are appended after the DENO_V8_FLAGS environment variable.

Debugging options

`--inspect`

Activate inspector on host:port [default: 127.0.0.1:9229]

`--inspect-brk`

Activate inspector on host:port, wait for debugger to connect and break at the start of user script.

`--inspect-wait`

Activate inspector on host:port and wait for debugger to connect before running user code.