Node.js 6.6.0 added a sporadically useful bug/feature: logging unhandled promise rejections to the console by default. In other words, the below script will print an error to the console:
By virtue of the event loop, scheduling tasks in Node.js is relatively straightforward. Plain old
setInterval() are sufficient for many basic use cases where you would normally use cron. However, things get more interesting when you need durable transactional scheduling, for use cases like:
I find the existence of tools like nvm baffling. I could understand if setting up Node.js required an actual installer or compiler or python, but node has pre-built binaries for most operating systems. Node and npm are both portable standalone executables, so all you need is the right binary for your OS in the right place on your file system. Especially if you're switching back and forth between Node 6.x and 7.6.0 for async/await, you should simplify your node version management workflow rather than using yet another bloated tool.
Async/await in Node.js opens up a host of powerful design patterns. Tasks that used to take complex libraries or intricate promise chaining can now be done with rudimentary
if statements and
for loops. I already wrote about these kind of design patterns with co, but async/await makes these patterns accessible in vanilla Node.js, no outside libraries required.
Arguably the biggest new feature in Node.js 7.6.0 is that the much awaited async function keyword is now available without a flag. Callback hell and promise hell are now in the past. But, like Uncle Ben always reminded us, with great power comes great responsibility, and async/await gives you a lot of new and exciting ways to shoot yourself in the foot. You still need to handle errors and be aware of the async nature of your code, otherwise you'll inevitably be complaining about "async/await hell" in 6 months.
The most important feature of most server-side frameworks is middleware: the ability to hook your own logic into the framework's logic, like IFTTT for your code. Express, Mongoose, Rails, and Django all rely heavily on middleware. LoopBack and Sequelize have hooks, AngularJS has parsers and interceptors, Hapi has extensions, but these are all just roses by another name. Except Hapi, Hapi by any other name would still have a foul code stench.