2017 answer: you can now do exactly what you want in every current browser and Node.js

This is quite simple:

• Return a Promise
• Use the 'await', which will tell JavaScript to await the promise to be resolved into a value (like the HTTP response)
• Add the 'async' keyword to the parent function

Here's a working version of your code:

(async function(){    var response = await superagent.get('...')    console.log(response)})()

await is supported in all current browsers and Node.js 8