Javascript 在firebase云函数中使用导入

我正在尝试在节点版本为12的本地计算机上运行firebase云函数，其“服务”：“firebase模拟器：启动--仅函数”。
我无法使用

.mjs

扩展名，因为如果我使用.mjs firebase将无法识别该扩展名，并导致以下错误：

require() of ES modules is not supported.
require() of /home/rumesh/IdeaProjects/firebaseapp/functions/index.js from /usr/local/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.
Instead rename index.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from /home/rumesh/IdeaProjects/firebaseapp/functions/package.json. 

错误：找不到模块“/home/rumesh/IdeaProjects/firebaseapp/functions”

无法在package.json中使用

“type”：module

，此错误为：

require() of ES modules is not supported.
require() of /home/rumesh/IdeaProjects/firebaseapp/functions/index.js from /usr/local/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.
Instead rename index.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from /home/rumesh/IdeaProjects/firebaseapp/functions/package.json. 

在这种情况下，如何在不使用require语句的情况下使用import语句？

对此提出了一个问题，因为它是受支持的运行时的一部分