module.syncBuiltinESMExports()

module.syncBuiltinESMExports() 方法更新内置的 ES 模块的所有实时绑定，以匹配 CommonJS 导出的属性。 它不会在 ES 模块中添加或删除导出的名称。

const fs = require('fs');
const { syncBuiltinESMExports } = require('module');

fs.readFile = null;

delete fs.readFileSync;

fs.newAPI = function newAPI() {
  // ...
};

syncBuiltinESMExports();

import('fs').then((esmFS) => {
  assert.strictEqual(esmFS.readFile, null);
  assert.strictEqual('readFileSync' in fs, true);
  assert.strictEqual(esmFS.newAPI, undefined);
});

The module.syncBuiltinESMExports() method updates all the live bindings for builtin ES Modules to match the properties of the CommonJS exports. It does not add or remove exported names from the ES Modules.

const fs = require('fs');
const { syncBuiltinESMExports } = require('module');

fs.readFile = null;

delete fs.readFileSync;

fs.newAPI = function newAPI() {
  // ...
};

syncBuiltinESMExports();

import('fs').then((esmFS) => {
  assert.strictEqual(esmFS.readFile, null);
  assert.strictEqual('readFileSync' in fs, true);
  assert.strictEqual(esmFS.newAPI, undefined);
});