Express.js：如何使用基于 NODE_ENV 的不同中间件？

Question

I have two middlewares, router1 for prod and router2 for test and dev. How to use different middlewares based on NODE_ENV?

How about the following codes?

if( process.env.NODE_ENV === 'prod' ) {
    app.use('/', router1);
} else {
    app.use('/', router2);
}

Any better solutions? Thanks

Answer 1

I would do something like this to have a legible set of available environments (you may need staging and test at one point), and that way you wouldn't have to modify code any time you add a new env to the object.

var routers = {
  prod: /* declare prod router */,
  dev: /* declare dev router */,
};

app.use('/', routers[process.env.NODE_ENV] || routers.dev);