feat(esm): 按目录加载脚本、打包与热更新

把一个目录当脚本仓库:按路径寻址、esbuild 打包、内容变了自动重编。

  - Loader    扫目录建索引,Load(name) 给出打好包的源码和版本号
  - bundler   esbuild 的封装。ESM 格式而不是 IIFE——IIFE 会附带一整套
              CommonJS interop helper,每建一个 VM 都要重跑一遍
  - plugin    把扩展的 TS 模块变成可以 import 的虚拟模块,磁盘上没有文件
  - typings   把这些虚拟模块的类型按 node_modules 布局落盘,编辑器才认识

esbuild 原生实现了 Node 的模块解析,所以脚本能直接 import node_modules
里的第三方库。写出来的类型文件是 index.ts 而不是 index.d.ts:扩展给的是
真正的模块源码,里面可能带实现,声明文件里不允许有实现。

node_modules 不参与热更新的版本计算——依赖包是装出来的,改动总伴随显式的
安装动作,而真实的 npm 包动辄上千个文件,每次取脚本 stat 一遍太贵。
This commit is contained in:
2026-09-05 22:13:57 +08:00
parent 7fb8d0f966
commit 6ce9b483fd
34 changed files with 2403 additions and 0 deletions
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export function money(n: number): string { return "¥" + n.toFixed(2) }
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{ "name": "@fsdpf/util", "version": "1.0.0", "main": "index.ts", "types": "index.ts" }
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export function upper(s) { return String(s).toUpperCase() }
export default { upper }
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{ "name": "tinylib", "version": "1.0.0", "main": "index.js" }
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{
"name": "fsdpf-app",
"private": true,
"type": "module",
"dependencies": {
"@fsdpf/util": "^1.0.0",
"tinylib": "^1.0.0"
}
}
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export default class AsyncController {
Sync(): string { return "同步结果" }
async Async(): Promise<string> { return "异步结果" }
async AwaitSomething(): Promise<string> {
const v = await Promise.resolve("await 的结果")
return v
}
async Fails(): Promise<string> { throw new Error("异步失败") }
// 永远不会 resolve —— goja 没有事件循环,没人能让它完成
Never(): Promise<string> { return new Promise(function () {}) }
}
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export default class PkgImportController {
constructor(pkgName) { this.pkgName = pkgName; this.count = 0 }
Init() { return "PkgImport:" + this.pkgName }
Handle() { return ++this.count }
}
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// 只有命名导出,没有 default——应该整个模块当导出对象用
export function Options(): string { return "opts" }
export function Version(): string { return "v1" }
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import ResExecuter from "./ResExecuter"
import { nextId, tag } from "./shared"
export default class ResCreateController {
private ex: ResExecuter
private count = 0
constructor(private resName: string, private mode: string) {
this.ex = new ResExecuter()
}
Init(): string { return "ResCreate:" + this.resName + "/" + this.mode }
Store(cfg: string): string { this.count++; return this.ex.Store(cfg) + "#" + this.count }
Seq(): string { return tag("create:" + nextId()) }
Boom(): void { throw new Error("创建失败") }
}
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import { nextId, tag } from "./shared"
export default class ResDeleteController {
Seq(): string { return tag("delete:" + nextId()) }
}
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// 被同目录 controller import 的公共类
export default class ResExecuter {
Store(cfg: string): string { return "stored:" + cfg }
Destroy(id: string): string { return "destroyed:" + id }
}
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import { upper } from "tinylib"
import { money } from "@fsdpf/util"
import { bracket } from "@lib/format"
import ResExecuter from "./ResExecuter"
export default class ResSchemaController {
private ex = new ResExecuter()
Describe(name: string, price: number): string {
return upper(name) + " " + money(price) + " " + this.ex.Store("s")
}
// 走 tsconfig 里配的 @lib/* 路径别名
Tag(s: string): string {
return bracket(s)
}
}
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// 公共纯函数 + 一个模块级状态(用来验证状态不跨 controller 共享)
let seq = 0
export function nextId(): number { return ++seq }
export function tag(s: string): string { return "[" + s + "]" }
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// 往共享的 store 里写购物车
export default class CartController {
private ops = 0
Add(sku: string, qty: number): number {
this.ops++
const items = store.GetOr("items", {}) as Record<string, number>
items[sku] = (items[sku] || 0) + qty
store.Set("items", items)
return store.Incr("total", qty)
}
// 自己的调用计数,跟另一个 controller 无关
Ops(): number { return this.ops }
}
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// 从共享的 store 里读购物车下单
export default class OrderController {
private ops = 0
Checkout(): string {
this.ops++
const items = store.GetOr("items", {}) as Record<string, number>
const skus = Object.keys(items).sort()
return skus.join(",") + "|" + store.Get("total")
}
Ops(): number { return this.ops }
}
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// 放在 src/lib 下的公共模块,controller 通过 tsconfig 的 @lib/* 别名引用
export function bracket(s: string): string {
return "[" + s + "]"
}
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{
"compilerOptions": {
"target": "ES2017",
"module": "ESNext",
"moduleResolution": "bundler",
"strict": true,
"baseUrl": ".",
"paths": {
"@lib/*": ["./src/lib/*"]
},
"experimentalDecorators": true
},
"include": ["src/**/*"]
}
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export function only() { return "app2 专属依赖" }
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{ "name": "only2", "main": "index.js" }
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import { only } from "only2"
export default class ExtraController {
Who(): string { return "app2 独有:" + only() }
}
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// 跟 app/src 下同名,用来验证「后面的目录覆盖前面的」
export default class ResCreateController {
Init(): string { return "来自 app2 的覆盖实现" }
}
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{ "compilerOptions": { "target": "ES2017", "strict": true } }
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// 用 import 拿到 store 的类型,而不是直接用全局
import store, { Store } from "@jscriptx/store"
export default class TypedController {
Put(k: string, v: string): void {
store.Set(k, v)
}
Take(k: string): any {
return store.Get(k)
}
// 类型也导出得到
Describe(s: Store = store): number {
return s.Len()
}
}