How to write Good Automated Tests
Writing good tests requires skill and consistency to effectively catch bugs and errors before they make their way into production. Writing tests is one thing, but writing good tests is another. Good…
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Opinionated JavaScript
As you write more and more code, you start realizing that there is more than one way to solve the problem. While everyone is looking for the “silver bullet” that will solve all the problems, there is no perfect way to code everything.
That said, it is healthy to form opinions on how to write code. Being “opinionated” is not a bad thing. In fact, it is very healthy to form opinions. That said, it is also just as important to understand why you have those opinions.
This post will highlight some of the stronger opinions I have developed for how I write JavaScript now and why I have those opinions.
A common check we look for in JavaScript is if we have a value or not. A clever trick that is often taken advantage of in JavaScript is that null and undefined are considered “falsy,” which lets us write code like this:
As simple as this seems now, it has a few issues. First of all, the 0 and empty strings are also falsy values, which means the above code will run for situations other than just undefined or null.
Beyond that, the longer you separate yourself from when you wrote this code, the harder this code is to read. The above code isn’t clear if myVariable is a boolean or an object or what.
You can avoid both these problems if you explicitly check for the value you want:
On a side note, if your variable potentially could be undefined, I highly recommend that you attach maybe to the front of the variable name to show that it might be undefined. For example, maybeUser would…
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