JavaScript short tutorials
Medium
In modern frontend applications, interface smoothness and browser performance are critical. Many JavaScript functions are triggered by fast, repeated user actions such as scrolling, resizing the window, or typing text. If the number of these calls is not limited, the application can gradually become slower, and interactions may start to feel heavy and unresponsive. That’s […]
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Beginner
What is a recursive function A recursive function is a function that calls itself. It keeps doing so until it reaches a specific stopping condition (known as the base case). This approach makes it possible to solve problems that involve repeating the same operation on smaller pieces of data, such as summing elements in a […]
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Beginner
What Is JSX (JavaScript XML)? JSX is a syntax extension for JavaScript that allows you to write HTML-like structures directly inside JavaScript code. It was created by the Facebook team (now Meta) in 2013 as part of the React library and has since become a standard in the frontend ecosystem. Instead of separating logic and […]
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Beginner
1. Event propagation Event propagation is the way events travel through the DOM tree. There are two directions of propagation: Example of event propagation Let’s assume we have the following HTML: And we add two event listeners: If you click on #child, you will see in the console: This happens because the event bubbles (it […]
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Beginner
Object destructuring is a syntax in JavaScript that allows you to extract values from objects and assign them to variables in a straightforward way. This enables easy access to data stored in objects without having to reference the object’s properties each time.
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If you’re reading this post then you probably have problem with slider, that don’t work correctly if occurs several times on the same page. I have a solution to you – simple jQuery slider, that you can put on page as many times, as you want and it will be work as it should.
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Infinite scroll gallery is a simple and difficult task at the same time. It all depends on how you want to display it. For start, let’s write the basic assumptions:
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Every junior front-end developer should know what hoisting is. This issue can be easily understood, so if you have not heard of it before, you can quickly catch up:
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Depending on what you currently want to achieve, you can use several solutions to check if the string contains substring:
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We have array [“javascript”, “jest”, “fajny”, 1, 2, 3]. Let’s see what’s happends, if we want to copy it and assign it do variable, and next modify it:
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