Node.js Best Practices — Modern Features

Make our lives easier with modern technologies. Like any kind of apps, JavaScript apps also have to be written well. Otherwise, we run into all kinds of issues later on. In this article, we’ll look at some best practices we should follow when writing Node apps.

Like any kind of apps, JavaScript apps also have to be written well.

Otherwise, we run into all kinds of issues later on.

In this article, we’ll look at some best practices we should follow when writing Node apps.

Use ES2015+

E2015 and later features have been supported by Node since v4.

This means that we can use those features in very early versions.

There’s no excuse not to use them now.

We don’t need Babel to use the latest features.

Most of the stage 4 features are available.

If we aren’t sure if our version of Node supports the feature we want, we can check node.green to be sure.

Use Promises

Promises let us write async code in a clean way.

They make our lives a lot easier.

Instead of writng:

fs.readFile('./foo.json', 'utf-8', (err, data) => {
  if (err) {
    return console.log(err)
  }
  try {
    JSON.parse(data)
  } catch (ex) {
    return console.log(ex)
  }
  console.log(data.name)
})

We write:

import * as Promise from "bluebird";
const fs = Promise.promisifyAll(require("fs"));

fs.readFileAsync('./foo.json')
.then(JSON.parse)
.then((data) => {
  console.log(data.name)
})
.catch((e) => {
  console.error('error reading file', e)
})

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