Express4项目：Node与Nodemon差异及CommonJS迁移后脚本参数疑问

Let's unpack your questions one by one to clarify what's going on here:

1. Are --inspect --exec babel-node -e js only for Nodemon? #

Not exactly—let's break down each part:

• --inspect: This is a Node.js native flag, not exclusive to Nodemon. It enables the Node.js debugger, letting you attach tools like Chrome DevTools to debug your code. You can use it directly with node too, e.g., node --inspect ./src/server.js works perfectly fine without Nodemon.
• --exec babel-node -e js: This part is specific to Nodemon. The --exec flag tells Nodemon to use a custom executor (instead of the default node) to run your files. babel-node is Babel's CLI tool that transpiles ES6+ code on-the-fly before running it. The -e js specifies that .js files should be handled by this executor. So this combo is Nodemon-specific in how it's used, but babel-node itself is a standalone tool.

2. Do you still need these flags with Node.js 8 (no ES modules)? #

Absolutely not, and your current setup is the right call here. Here's why:

• Node.js 8 (powered by V8 engine 5.8) has excellent native support for most ES6 and ES2017 features—things like arrow functions, let/const, destructuring, Promise, class, and even async/await work out of the box without transpilation.
• The only major ES6 feature Node.js 8 doesn't support natively is ES modules (import/export). Since you've migrated to CommonJS (require/module.exports), you no longer need babel-node to transpile your code. Removing those flags eliminates the on-the-fly transpilation step, making your server run faster and more efficiently.

Final Takeaway #

Your updated start script is optimal for your current setup. You've removed unnecessary transpilation overhead, and since you're not using ES modules anymore, Node.js 8 can handle all your ES6/ES2017 code natively. The --inspect flag is still available if you ever need to debug—just add it back to your node command like NODE_ENV=development node --inspect ./src/server.js.

内容的提问来源于stack exchange，提问作者DDave