JavaScript Best Practices — Assumptions and Optimizations

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 JavaScript code.

Use the Module Pattern to Encapsulate

We can use the module pattern to encapsulate our code.

This lets us keep private variables in any JavaScript code.

For example, we can write:

(function(){
  let x = 123;
  console.log(x);
})(); /

We have the variable x that’s only available inside the function.

It’s also useful when classes or constructors don’t make sense.

If we need to refer our JavaScript code else, we should namespace them to make them easy to find.

For example, we can write:

let MyNamespace = MyNamespace || {};

MyNamespace.MyModule = () => {
    // ...
}

our namespace has properties, which include objects we use as a module.

We should scope our JavaScript if we aren’t calling it anywhere.

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