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We will see what debouncing is and how we can implement it using a real world example like handling a resize event on the browser window. I have written a sort of example here in which we are having a function named reportNewWidth, and whenever this function gets called it will print a line showing … Read more

I am going to create a button which can copy the text from the website. I have a basic HTML setup with a paragraph that contains some text and an id, and a button with the label “Copy text”. When I click the button, I want the functionality that this particular text gets copied. JavaScript … Read more

Here is a small project to understand how to disable a button after a click using JavaScript. When the form gets submitted we want to disable the button so the user cannot just randomly click it again and again. We will also show a message in a paragraph element and change the button text after … Read more

We will learn how to create a shallow copy of an object in JavaScript. A basic but powerful technique every developer should know. A JavaScript shallow copy copies only the first level of properties in an object. Nested objects or arrays are not cloned – they are still referenced from the original. This is useful … Read more

I am going to show how to generate a list from an array dynamically with the help of JavaScript. We will create a simple unordered list in HTML, then populate it from a JavaScript array using forEach, document.createElement, and appendChild. Setup HTML for JavaScript Array to List     Create a starting HTML file and … Read more

I am going to build a simple JavaScript modal popup. There is a button that opens the modal, a div that shows the pop-up content, and inside it a close span with the × symbol and a paragraph that reads Simple modal pop-up. HTML for JavaScript Modal Popup     Here is the basic HTML … Read more

The most confusing part of JavaScript is the this keyword. You will understand what this really is and how its value changes, and you will see practical examples you can remember. Think of this as the owner of the function. It is a special keyword that always points to the current context. Understanding the JavaScript … Read more

We will learn about how we can take the user input with the help of the prompt method in JavaScript. Your prompt method opens a popup where the user can enter some text. One thing which is very important about prompt is that it always returns a string. If the user presses Cancel, in that … Read more

We will talk about one of the most confusing values in JavaScript: NaN. You will learn what it means, why it happens, and how we can deal with it. Handling NaN in JavaScript – What is NaN?     N stands for Not a Number. It is a special value that JavaScript returns when a … Read more

Accessing HTML elements using JavaScript is the most important and fundamental topic by which we can perform DOM manipulation and other work with JavaScript. I will show simple ways to select elements and then change their text or styles. I have some of the HTML part here. The first is a heading whose id is … Read more