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NodeJS FAQ

  • 持久化 DB 存储是 NodeJS 的弱项
    • 官方 正在尝试支持集成 SQLite
    • 纯 JS 没有好的存储实现
    • SQLite 依赖 addon
    • SQLite over WASM 还不成熟
  • FFI 是 NodeJS 的弱项
    • 可以尝试 bun:ffi
    • nodejs/node#46905 ffi implementation
    • nodejs/node#46233 Reconsider adding FFI to the core
      • tinycc does not support all of the platforms that node does
  • 直接运行 typescript
    • --experimental-strip-types
  • import.meta.main

env

  • NODE_OPTIONS

Tool Chain

  • 静态项目 - ViteJS
  • 前端项目 - NextJS+trpc+NestJS - 复杂项目
    • 部分 NestJS 逻辑共用
    • 输出 standalone 模式 - 直接拷贝到容器即可
  • 后端项目 - NestJS+fastify
    • 开发: ts-node --swc --esm --transpileOnly --watch src/main.ts
      • tsx 不支持 decorator,不然可以用 tsx
    • 构建: esbuild --bundle --external=sharp src/main.ts
      • 输出一个 js 放到容器即可
      • 注意加 tsc 插件处理 decorator
  • 基础依赖
    • zod
    • valtio, zustand
    • daisyui, styled-components
    • dayjs
pnpm node --loader ts-node/esm --watch ./src/apps/ve-contract-server/main.ts
tsconfig.json
{
"ts-node": {
"transpileOnly": true,
"swc": true,
"esm": true,
"files": true,
"experimentalSpecifierResolution": "node"
}
}

Node Dev

  • ts+watch - tsx, ts-node, swc-node
    • +decorator
      • ts-node+swc
    • +tsconfig.paths
      • tsx, ts-node+tsconfig-paths
      • +esm
        • tsx
  • 目前还没有 esm+tsconfig.paths+decorator 的

选择包管理器

选择 pnpm

  • pnpm
    • 速度快
    • 使用 hardlink - 节省空间,速度快
      • 如果在 wsl 可能用不了 hardlink,回退为 softlink 或者 copy 方式
    • 意外情况比较少
    • workspace 支持完善
  • npm
    • node_modules 太大
    • 安装慢
    • 如果 pnpm 不兼容的情况可以考虑 npm
  • yarn v1
    • 比 npm 好一点 - 区别越来越小
    • 支持 workspace
  • yarn berry
    • 很多工具不支持
    • pnp 方式生态推进慢
    • 不建议使用

shebang

CJS

#!/usr/bin/env node

ESM

#!/usr/bin/env bash
":" //# comment
exec /usr/bin/env node --input-type=module - "$@" < "$0"

NodeJS 20.10+

node --experimental-default-type=module cli

performance

  • UV_THREADPOOL_SIZE=4
    • 最大 1024
  • knex
    • pool min:2, max: 10
  • fastify
  • fast-json-stringify
  • find-my-way

musl

sqlite3

# ./node_modules/sqlite3/build/Release/node_sqlite3.node
find ./node_modules/sqlite3/ -iname '*.node'

npm install sqlite3 --build-from-source

source map

import '@cspotcode/source-map-support/register';

cjs __dirname

import * as url from 'url';
const __filename = url.fileURLToPath(import.meta.url);
const __dirname = url.fileURLToPath(new URL('.', import.meta.url));

直接执行 typescript 或 esnext

  • tsx
  • ts-node
  • babel
  • tsm
# tsx
# ==========
npx tsx app.ts
node --loader tsx app.ts
node --loader @esbuild-kit/esm-loader app.ts

# ts-node
# ==========
node -r @ts-node/register app.ts
# tsconfig 里的 path 能生效
node -r @ts-node/register -r tsconfig-paths/register app.ts

# babel
# ==========
node -r @babel/register app.js

Package 'OpenEXR', required by 'vips', not found

找不到 brew 安装的 pkgconfig

PKG_CONFIG_PATH=/usr/local/opt/vips/lib/pkgconfig:/usr/local/opt/glib/lib/pkgconfig:/usr/local/opt/openexr/lib/pkgconfig:/usr/local/opt/imath/lib/pkgconfig npm i
/usr/local/include/vips/vips8:35:10: fatal error: 'glib-object.h' file not found
# export CC
export CXX="$(which g++) -I/usr/local/opt/glib/include/glib-2.0/ -I/usr/local/opt/glib/lib/glib-2.0/include/"

export CXX="$(which g++) $(pkg-config --cflags glib-2.0)"

libtool: unrecognized option -static when building

libtool:   error: unrecognised option: '-static'
brew unlink libtool
rm -rf /usr/local/bin/libtool
which libtool

# 如果添加了 /usr/local/opt/libtool/libexec/gnubin
export PATH=$(echo $PATH | sed -r 's/:[^:]*?libtool[^:]*:/:/')

require() of ES modules is not supported

尝试降级依赖

NodeJS v18 fetch proxy

  • 不支持 Agent
  • 用 node-fetch 或者 undici
const Undici = requuire('undici');
const ProxyAgent = Undici.ProxyAgent;
const setGlobalDispatcher = Undici.setGlobalDispatcher;

setGlobalDispatcher(new ProxyAgent(process.env.HTTP_PROXY));

RequestInit: duplex option is required when sending a body

TypeError: Cannot set property duplex of #<Request> which has only a getter
let init: RequestInit & Record<string, any> = {
get duplex() {
return 'half';
},
};

Critical dependency: require function is used in a way in which dependencies cannot be statically extracted

检查下是不是 import 路径错误,可能因为 IDE 自动导入,指向了错误路径。

Undefined variable module_name in binding.gyp while trying to load binding.gyp

可能 npm 问题,使用 pnpm 构建没问题

Custom ESM Loaders is an experimental feature. This feature could change at any time

目前无法 supress 警告, 只能通过 require 注入避免

node --require suppress-experimental.cjs --loader tsx app.ts
suppress-experimental.cjs
'use strict';
// When using the ESM loader Node.js prints either of the following warnings
//
// - ExperimentalWarning: --experimental-loader is an experimental feature. This feature could change at any time
// - ExperimentalWarning: Custom ESM Loaders is an experimental feature. This feature could change at any time
//
// Having this warning show up once is "fine" but it's also printed
// for each Worker that is created so it ends up spamming stderr.
// Since that doesn't provide any value we suppress the warning.
const originalEmit = process.emit;
// @ts-expect-error - TS complains about the return type of originalEmit.apply
process.emit = function (name, data, ...args) {
if (
name === `warning` &&
typeof data === `object` &&
data.name === `ExperimentalWarning` &&
(data.message.includes(`--experimental-loader`) ||
data.message.includes(`Custom ESM Loaders is an experimental feature`))
)
return false;

// return originalEmit.apply(process, arguments as unknown as Parameters<typeof process.emit>);
return originalEmit.apply(process, arguments);
};

Reached heap limit Allocation failed - JavaScript heap out of memory

NODE_OPTIONS="--max-old-space-size=8192" eslint --fix
  • DEBUG=*
  • DEBUG=typescript-eslint
  • TIMING=1

Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

  • 可增加
node -e 'console.log(v8.getHeapStatistics().heap_size_limit/(1024*1024))'
NODE_OPTIONS="--max-old-space-size=8192" node -e 'console.log(v8.getHeapStatistics().heap_size_limit/(1024*1024))'

Can't resolve 'pg-native'

// webpack
export default {
resolve: {
alias: {
'pg-native': path.join(__dirname, 'pg-native'),
},
},
};

pg-native

{
"name": "pg-native",
"private": true,
"main": "index.js"
}
{
"name": "your-module",
"private": true,
"dependencies": {
"pg": "^8.3.3",
"pg-native": "file:./modules/pg-native"
}
}
module.exports = null;

REPL load

node -i -e "$(< rc.js)"

error:0308010C:digital envelope routines::unsupported

export NODE_OPTIONS=--openssl-legacy-provider

snapshot

  • 使用 snapshot 加速启动
    • 例如: main.mjs 10mb, main.mjs.map 20mb
      • --enable-source-maps 启动 40s
      • enable-source-maps 启动 2s
  • NODE_COMPILE_CACHE
    • v22.1.0+
    • 支持 cjs & esm
echo "globalThis.foo = 'I am from the snapshot'" > snapshot.js
node --snapshot-blob snapshot.blob --build-snapshot snapshot.js
echo "console.log(globalThis.foo)" > index.js
node --snapshot-blob snapshot.blob index.js

echo "require('v8').startupSnapshot.setDeserializeMainFunction(() => console.log('I am from the snapshot'))" > snapshot.js
node --snapshot-blob snapshot.blob --build-snapshot snapshot.js
node --snapshot-blob snapshot.blob

fastify vs express

  • fastify
    • 更快
      • fast-json-stringify
    • 模块化
    • 更易用
  • express
    • 更成熟?
    • monolithic
    • 生态更大 - 功能更多

import npm global

export NODE_PATH=$(npm root --quiet -g)

ERR_OSSL_EVP_UNSUPPORTED

Error: error:0308010C:digital envelope routines::unsupported
at new Hash (node:internal/crypto/hash:71:19)
at Object.createHash (node:crypto:133:10)
at BulkUpdateDecorator.hashFactory (~/node_modules/.pnpm/[email protected][email protected]/node_modules/webpack/lib/util/createHash.js:145:18)
  • pnpm 安装有问题,换 npm 后好了

getaddrinfo ENOTFOUND undefined

fetch(`http://example.com`);

命令行获取 package 所在目录

pnpm pwd
pnpm node -e 'process.stdout.write(path.resolve(__dirname))'
PKG_ROOT ?= $(shell pnpm node -e 'process.stdout.write(path.resolve(__dirname))')

ioredis vs redis

⚠️ ioredis 在被 redis 收编后不在怎么维护

The operation failed for an operation-specific reason: Cipher job failed

Failed to execute 'digest' on 'SubtleCrypto': 2nd argument is not instance of ArrayBuffer, Buffer, TypedArray, or DataView.

多半是传入了 undefined

detect runtime

  • bun 也会设置 process.versions.node
console.log(process.release.name); // 总是 node

// bun
if (process.versions.bun) {
}
if (typeof Bun !== 'undefined') {
}

unhandled

  • uncaughtException
process
.on('unhandledRejection', (reason, p) => {
console.error('Unhandled Rejection at Promise', reason, p);
})
.on('uncaughtException', (err, origin) => {
fs.writeSync(process.stderr.fd, `Caught exception: ${err}\n` + `Exception origin: ${origin}\n`);
console.log(`ERROR`, err);
process.exit(1);
});

The "windows-1252" encoding is not supported

Throug

new TextDecoder('latin1');
# icu-data-en 不够
# 11.53 MB / 29.38 MB
apk add icu-data-full