How can I use babel 6 with pm2 1.0?

Question

I have server code written in ES6, and I use pm2 to manage that server. A few months ago, I used the next_gen_js option and it worked magically.

However, I now tried to update pm2 to v1.0.0, and I get errors about import being an illegal token. Basically, my ES6 files are not parsed as ES6 anymore.

What can I do to use pm2 with ES6 files?

Answer 1

pm2 dropped the next_gen_js flag in v1.0.0, because it bundled babel, which was quite heavy.

You basically have four options.

1. Stop using ES6 on your backend.
2. Stick to pm2 v0.14 and use the next_gen_js flag.
3. Use the interpreter (alias of exec_interpreter ) flag and set it to babel-node . You'll need to add babel-cli as a dependency of your app. Note that the interpreter option is compatible only with the fork exec_mode , not with cluster . This option being still in beta at the time of writing, this might not be a major issue unless you have important scaling constraints.
4. Use some specific entry point that first requires babel-register . For example, you might have a server.js file that's in ES6 and the preferred entry point for ES6-compatible engines, and an index.js that only does require('babel-register'); require('./server'); require('babel-register'); require('./server'); .

Answer 2

从文档（ http://pm2.keymetrics.io/docs/usage/quick-start/ ）中，您只需使用以下解释器标签启动pm2即可：

pm2 start --interpreter babel-node server.js //(server.es6)