[feat] tree shake namespace XXX {}

[loynoir]

Reproduce

$ npm exec -- esbuild --format=esm --bundle ./entry.mts

==> entry.mts <==
import { TypeRegistry } from './lib.mjs'

TypeRegistry.Clear()

==> lib.mts <==
export namespace TypeRegistry {
  const map = new Map<string, unknown>()
  export function Entries() {
    return new Map(map)
  }
  export function Clear() {
    return map.clear()
  }
}

Actual

// lib.mts
var TypeRegistry;
((TypeRegistry2) => {
  const map = /* @__PURE__ */ new Map();
  function Entries() {
    return new Map(map);
  }
  TypeRegistry2.Entries = Entries;
  function Clear() {
    return map.clear();
  }
  TypeRegistry2.Clear = Clear;
})(TypeRegistry || (TypeRegistry = {}));

// entry.mts
TypeRegistry.Clear();

Expected

// lib.mts
var TypeRegistry = / /* @__PURE__ */(()=>{
((TypeRegistry2) => {
  const map = /* @__PURE__ */ new Map();
  function Clear() {
    return map.clear();
  }
  TypeRegistry2.Clear = /* @__PURE__ */Clear;
})(TypeRegistry || (TypeRegistry = {}));
})()

// entry.mts
TypeRegistry.Clear();

Related

sinclairzx81/typebox#401

[loynoir]

Close in favor of #3077