JavaScript short tutorials
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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By sorting an array of numbers and using the built-in sort() function, you’ll definitely notice that, by default, sorting doesn’t go from smallest to largest, but alphabetically.
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