Interactions happen through a public interface (API). Objects are building blocks of applications and interact with one another. In OOP objects are self-contained pieces/blocks of code like small applications on their own. By using objects, we pack all the data and the corresponding behavior into one big block. Objects may contain data (properties) and also code (methods). We use objects to model (describe) aspects of the real world, like a user or a to-do list item, or even more abstract features like an HTML component or some kind of data structure. And paradigm simply means the style of the code, how we write and organize code. Object-Oriented Programming(OOP) is a programming paradigm based on the concept of objects. In this article, we'll explain the concept, and look at technologies that make it possible, such as XMLHttpRequest and the Fetch API.Photo by Markus Spiske on Unsplash What Is Object-Oriented Programming? This seemingly small detail has had a huge impact on the performance and behavior of sites. Fetching data from the serverĪnother very common task in modern websites and applications is retrieving individual data items from the server to update sections of a webpage without having to load an entirely new page. In this article, we'll look at how to use the DOM in detail, along with some other interesting APIs that can alter your environment in interesting ways. This is usually done by using the Document Object Model (DOM), a set of APIs for controlling HTML and styling information that makes heavy use of the Document object. When writing web pages and apps, one of the most common things you'll want to do is manipulate web documents in some way. Solve common problems in your JavaScript codeįirst up, we'll start by looking at APIs from a high level - what are they, how do they work, how do you use them in your code, and how are they structured? We'll also take a look at what the different main classes of APIs are, and what kind of uses they have.Express Tutorial Part 7: Deploying to production.Express Tutorial Part 6: Working with forms.Express Tutorial Part 5: Displaying library data.
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