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
I am going to create a simple accordion component. You can see I am having some sections and the content here. I want the functionality in such a way that when I click on section one, the content will appear and others will disappear. When I click on section two, its content will appear and … Read more
One of the most fundamental tools in programming is the for loop. You will know exactly what a for loop is, how to write one, and see practical examples. A for loop is a control structure that lets you repeat a block of code a specific number of times. If you want to execute a … Read more