Installing Node.JS

We’ve already talked about interfaces in TypeScript, some with our discussion on Custom Data Types. However, we can go further with what they can do. So we previously had an interface that looked something like: However, we might not want, or even need, all of those properties. Therefore, we can make some of them optional,…

We’ve already seen the standard data types in JavaScript and TypeScript. However, JavaScript allows for class, and we want to therefore be able to define a custom data type within TypeScript. Since JavaScript supports classes and object-oriented programming, so does TypeScript. You can explicitly describe this object’s shape using an interface declaration. Then, to define an object…

It is common to write a function where the return data type is related to the data type(s) of the parameters passed to the functions. Let’s look at an example of this: This function will return the first element of an array. However, it uses the any data type to allow for any type of…

JavaScript, as the language has gotten more complex, has realized that it needs to have the ability to easily import and export code from other modules, while not degrading the performance of a webpage. This is because, by default, a webpage downloads a script and processes it once downloaded, all while blocking all other downloads…

People, when they come to TypeScript, might have different ideas in mind with how strict they want types checked. Some people don’t want types at all, like JavaScript currently is, and want to use other aspects of TypeScript, while others might want to be very strict. The default experience with TypeScript, where types are optional,…

Once we’ve created our first TypeScript file, we need to convert it to JavaScript if we want our browsers (or Node.JS) to run it. There are several online sandbox tools to let you write code, but they won’t convert it to JavaScript, at least none that I’ve found yet. To set it up, you will…