Nodejs异步设置function

Question

I am currently switching from Nodejs v12 to v14 and it seems that v14 does not wait for the setup function to resolve anymore. I use Nodejs combined with Express. My code looks like this (simplified):

setup().then(context => {
    // app setup based on context 

    app.listen(8080)
})

Is there a prefered way to use an async setup function before initializing the rest of the application?

The setup function connects the database and return a single promise like so:

function setup() {
    // This is a postgres library that return a promise
    return db.connect(this.config);
}

On Node v12 it seems to await the promise and start listening on the specified port after it is done. However when I switch to version 14 it does not await the promise and gives a clean exit.

Answer 1

Did you try using async/await?

Try modifying function as shown below

async function setup() {
  
  await db.connect(this.config);
  
  app.listen(8080)

}