A detailed look at what the changes are going to be and how they will affect JavaScript. — With the promotion of Type Annotations to Proposal Level 1 Stage, JavaScript is one step closer to being a more strongly typed language. Let’s dive into what the changes will mean for JavaScript. Types in JavaScript JavaScript is dynamically typed. That means that it figures out the type of something by where it…

The spread operator, or 3 dots, is an operator in JavaScript which is used by both function calls and in arrays/objects. It has a multitude of different uses, so let’s take a look at how we use the spread operator in real JavaScript code. In function calls We can use the 3 dots…

Javascript arrays can contain duplicates — which is fine most of the time, but can sometimes cause some issues. For example, if an array is supposed to only contain unique user IDs, but is taken from a data source which may contain duplicates: let userIds = [ '123-123', '123-123', '234-234'…

Arrays in JavaScript are a simple, one dimensional way to store simple sets of data. Arrays are non unique, which means they can store duplicates (unlike sets). They also follow typical prototype inheritance, as with other Javascript types. …

In Javascript, we have numerous ways to check if something is or is not a number. This is a particularly common task in Javascript, where there is dynamic typing, resulting in some unexpected things being classified as numbers. …

v-if and v-show are two ways to conditionally render content in Vue. Both are built to conditionally render content in Vue, but in slightly different ways - which can be quite confusing. Let's take a look at how they work, and when you would use each. v-if vs v-show v-if in conditional rendering…

Defining a new object in Javascript is pretty easy — but what if you want to find out if it’s empty? For example, {} is an empty object, but how do we actually test that this is the case? let myObject = {} The easiest (and best) way to do…

The Promise.all() method in Javascript is a function which accepts many promises, and then does something only after they have all been settled. From all the promises you enter into it, it creates a new promise which then waits for each promise to finish, before continuing. …

In Javascript, we have lots of different ways to manipulate DOM elements. DOM elements are the HTML elements we define when we write our scripts. Once we are targetting a particular DOM element, it’s often useful to set its contents with new HTML content, or to retrieve its HTML content…