Node.js - wait for multiple async calls

Question

I\'m trying to make multiple MongoDB queries before I render a Jade template, but I can\'t quite figure out how to wait until all the Mongo Queries are completed before rend

Answer 1

This seems like the least lines of code using await:

var async = require("async"); //include async module
...
async function getData() { //make sure to use async function
  var NYlakes = await db.collection('lakes').find(filterNY); //can append additional logic after the find() 
  var NJlakes = await db.collection('lakes').find(filterNJ);

  res.json({"NYLakes": NYLakes, "NJLakes": NJLakes}); //render response
}

getData();

Side note: In this case await is serving as a Promise.all() be careful not to abuse the await function.