node 命令

常用示例

说明

node is the Node.js JavaScript and (with `--experimental-wasi`) WebAssembly runtime built on the V8 engine. It executes scripts on the server, exposing an event-driven, non-blocking I/O model and a large standard library (`fs`, `http`, `crypto`, `stream`, `child_process`, etc.). Node supports both CommonJS (`require`) and ECMAScript modules (`import`). Module type is determined by the file extension (`.cjs`/`.mjs`) or by the nearest `package.json`'s `"type"` field. Built-in modules can be imported with the `node:` specifier (e.g. `import fs from 'node:fs/promises'`). The interpreter ships with npm and npx for package management, a built-in test runner (`node --test`), worker threads for CPU-bound parallelism, and a built-in debugger and profiler accessible through `--inspect`.

参数

-e, --eval _CODE_

Evaluate _code_ as JavaScript without loading a file.

-p, --print _CODE_

Like -e but prints the result to stdout.

-r, --require _MODULE_

Preload _module_ before running the main script (CommonJS only).

--import _MODULE_

Preload an ES module before running the main script.

-c, --check

Parse the script and check for syntax errors without executing it.

-i, --interactive

Force the REPL even if stdin is not a TTY.

--inspect=_host:port_

Enable the V8 inspector on the given host/port (default 127.0.0.1:9229).

--inspect-brk=_host:port_

Like --inspect but break before user code starts.

--watch

Restart the process when watched files change. (Node.js 18+)

--watch-path _PATH_

Additional path to watch when --watch is enabled.

--enable-source-maps

Use source maps for stack traces.

--no-warnings

Silence all process warnings (including deprecations).

--max-old-space-size _MB_

Set the V8 old-generation heap size in megabytes.

--experimental-vm-modules

Enable the experimental ES module API in the `vm` module.

-v, --version

Print Node.js version.

-h, --help

Print Node.js command-line help.