ende eval

ende eval executes a string of code directly from the command line without needing a file. Unlike ende run, ende eval runs with all permissions enabled by default.

Basic usage

ende eval "console.log('Hello from Ende')"

TypeScript works out of the box:

ende eval "const greeting: string = 'Hello'; console.log(greeting)"

Printing expression results

Use --print (or -p) to evaluate an expression and print its result, similar to node -p:

ende eval -p "1 + 2"
# 3

ende eval -p "Ende.version"
# { ende: "2.x.x", v8: "...", typescript: "..." }

Reading from stdin

Combine with piped input for quick data processing:

echo '{"name":"ende"}' | ende eval -p "
  const text = await new Response(Ende.stdin.readable).text();
  JSON.parse(text).name
"

Command line usage:

eval

Evaluate a script from the command line

Options

--cached-only

Require that remote dependencies are already cached.

--cert

Load certificate authority from PEM encoded file.

--check

Enable type-checking. This subcommand does not type-check by default; pass --check=all to also type-check remote modules. Alternatively, use the 'ende check' subcommand.

--config, -c

Configure different aspects of ende including TypeScript, linting, and code formatting. Typically the configuration file will be called ende.json or ende.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.

--frozen-lockfile

Error out if lockfile is out of date.

--import-map

Load import map file from local file or remote URL.

--inspect

Activate inspector on host:port [default: 127.0.0.1:9229]. Host and port are optional. Using port 0 will assign a random free port.

--inspect-brk

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

--inspect-publish-uid

--inspect-wait

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

--location

Value of globalThis.location used by some web APIs.

--lock

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

--min-dep-age

(Unstable) The age in minutes, ISO-8601 duration or RFC3339 absolute timestamp (e.g. '120' for two hours, 'P2D' for two days, '2025-09-16' for cutoff date, '2025-09-16T12:00:00+00:00' for cutoff time, '0' to disable).

--no-check

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

--no-config

Disable automatic loading of the configuration file.

--no-lock

Disable auto discovery of the lock file.

--no-remote

Do not resolve remote modules.

--preload

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

--print, -p

print result to stdout.

--reload, -r

Reload source code cache (recompile TypeScript). With no value, reloads everything. Pass a comma-separated list of specifiers to reload only those modules; jsr:@ende/http/file-server,jsr:@ende/assert/equals reloads specific modules.

--seed

Set the random number generator seed.

--unsafely-ignore-certificate-errors

DANGER: Disables verification of TLS certificates.

--v8-flags

To see a list of all available flags use --v8-flags=--help Flags can also be set via the ENDE_V8_FLAGS environment variable. Any flags set with this flag are appended after the ENDE_V8_FLAGS environment variable.

--vendor

Toggles local vendor folder usage for remote modules.