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October 2, 2021 | Javascript

In this article, we are going to teach you, step by step, how you can create a very simple single page application. We are going to create it by showing and hiding div elements. SPA means we have single DOM page and using JavaScript we simulate multi page website by showing and hiding elements. Other option, which we are going to explore in another tutorial, is to create elements we need for a “page” and delete elements we don’t need at some point. You will need just a little knowledge of HTML, CSS, and some very basics of JavaScript. We will also embed code example, which will present this single page application and we will go through each line of code and each section so you can see exactly what we are doing. If you’ll go through the example, you will also notice some comments in the code, which will probably add another dimension for you to clarify things that are unclear. Let’s get started.

September 30, 2021 | Javascript

It is super important to understand basic concepts of JavaScript and scope is definitely one of them – you cannot work in JavaScript, if you don’t understand what scope is and this is the main reason we prepared this article.

September 21, 2021 | Javascript

JavaScript is an event-driven programming language, this is why the event is an essential part of JavaScript. In this article, you will learn what is an event, what are even handlers, and most importantly what is an eventlistener and what is an addEventListener() method.

July 9, 2021 | Javascript

This article is going to discuss the difference between passing by value vs passing by reference in JavaScript. We will look at the concept of primitive values and objects which are closely connected to the concept of passing value vs reference. How is that? Well, this almost answers the question from the headline. The main difference between passing by value and passing by reference is that the first is closely connected to primitive values or primitives, while the second takes place when assigning objects. In theory, this sounds neat, but really, let’s take a look at the examples and the concept of passing by value vs reference will be much clearer.

June 4, 2021 | Javascript

Generating random numbers, such as shuffling playing cards, rolling dice, or spinning roulette wheels are all examples of potential JavaScript projects where you could be using the JavaScript Math.random() method.

In this tutorial, we will help you understand how to generate a random number using the Math.random() method by building simple shuffling playing cards app.

May 31, 2021 | Javascript

Usually, a piece of JavaScript code is executed synchronously, this means the code runs line after line as it’s written after hoisting in one thread. However, there might be situations when you need to run a block of your code at some point later in the future – when you need to delay the execution of some instructions. This concept of telling your code to work asynchronously is called ‘scheduling a call’ – as simple as that. There are two methods in JavaScript that enable to schedule a call – (nested) setTimeout() and setInterval(). A very simple explanation would say setTimeout() runs the code once after the timeout – it fires once or it runs the call only once after an interval, while setInterval() runs the code repeatedly, with the length of the timeout between each interval – it repeats the call, it fires again and again in intervals.

In this tutorial, you’ll learn how these two methods work, what is the difference between (nested) setTimeout and setInterval and we’ll give you some practical examples to understand these concepts a bit better.

May 25, 2021 | Javascript

Sometimes it can be hard to remember the difference between substring and substr methods, but let’s make this article a quick reminder to help you out with understanding the substring and substr difference.

May 23, 2021 | Javascript

In this tutorial, we are going to create a relatively simple battle simulator project with n <= 5 battle units to fight between each other. The aim of the project is to achieve a complete and working JavaScript code. With this code, we will cover a lot of JavaScript language and coding concepts, such as object literal vs object constructor notation, functions vs. arrow functions – what’s the difference, and when and why to use each. We will also take a look at the concept of randomization and how Math.random() and Math.floor() methods can work in our favor. This will hopefully help you understand these concepts a bit better than reading about them individually. Let’s get started.

May 22, 2021 | Javascript

JavaScript is a very flexible programming language and often one problem can be solved in a few different ways. However, some ways are more appropriate and efficient for some problems than others. JavaScript is also an object-oriented programming language, which might be a bit puzzling when it comes to the creation of an object. Why?

May 15, 2021 | Javascript

Is closure a function? What is a nested function? What is a function scope? What is lexical environment and how does it work?
In this article, we’re going to answer all these questions and more – we are going to learn what functions and closures in JavaScript are, and most of all what is the main difference between functions and closures.