For storing the data there are various types of data types present in each programming language. Data may be in the form of string, character, number, etc. For each type of data type, there is a certain limit of memory allocated to use the memory efficiently for example, the character is a small unit and an integer may be large as compared to the character so it's better to define a character different from the integers. To use the memory efficiently there are various data types created based on the memory they are going to take which leads to ... Read More

Vue JS is an open-source JavaScript framework. It is used to create single-page apps and user interfaces. The component-based architecture of Vue Js uses separated, reusable elements called components to encapsulate HTML, JavaScript, and CSS. This enables the usage of a virtual DOM to boost performance while also helping efficient and maintainable code. Vue Js’s reactivity system, which allows it to immediately refresh the user interface when the underlying data changes, is one of its distinguishing characteristics. The “v-for” directive in Vue Js renders elements from iterating over arrays or objects based on the item looped over. Depending on the ... Read More

The process of assigning URLs to components in the Vue.js app is known as routing. Installing the Vue-router library and importing it into the Vue instance are prerequisites for implementing routing. Then, the user must specify the components displayed for each route in a different router.js file after defining a set of routes. Users may specify where the components for each route should be displayed in the main Vue template using the “router-view” component, and also, the users can switch between routes using the “router-link” component. A clicked link created by the routerlink component alters the URL and modifies ... Read More

Some old versions of the browsers or old browsers themselves don’t support the newly evolved features of JavaScript. For example, if you are using a very old browser version, it doesn’t support the features of the ES10 version of JavaScript. For example, some versions of the browser don’t support Array.falt() method, introduced in the ES10 version of JavaScript, to flatten the array. In such cases, we need to implement user-defined methods to support that features by the old browser version. Here, we will implement the polyfill for the trim() method of the String object. Syntax Users can follow the ... Read More

The polyfill is a concept to extend the browser's features using user-defined methods. If the user’s browser is not updated, it can happen that browser doesn’t support the newer features of any programming language, such as JavaScript. As a developer, we require to check whether the feature is supported by the browser, and if not, we need to invoke a user-defined method. In this tutorial, we will discuss implementing the polyfill for the array.reduce() method. If any browser doesn’t support the array.reduce() method, we will invoke the userdefined reduce() method. Before we start with the tutorial, Let’s ... Read More

When we click the input element in HTML, it sets the outline for the input element, focusing on it. Sometimes, we must execute some JavaScript code when the user loses focus from the input element. For example, We can autofocus the input element when the user refreshes the web page using the HTML’s ‘autoFocus’ attribute. After that, we can execute the JavaScript function when an element loses focus to ensure that the input value is not empty. If the input value is empty, and the element loses focus, we can show the error message like ‘This field is required’. ... Read More

Image transition means changing the image and replacing one image with another. Users can see the image transition in the image slider. While developing the image slider, we should focus on the animation for image transition to make an attractive UX of the application. In this tutorial, we will learn to add fading effect using various approaches to image transition. Add class to the image to show an image with fading effect We can use CSS to add fading effect to the image transition. The transition property of CSS allows us to add any transition to the image. So, ... Read More

Before creating the project, we will first discuss REST API. REST is a software architecture style and a collection of standards that helps make online services. Representational State Transfer is the full name of REST. At the same time, Application programming interfaces (API) allow communication between two or more computer programmes. It is a software interface that gives other software programmes a service. The user must follow the rules known as a REST API based on the HTTP (Hypertext Transfer Protocol) to access web services. Conventional HTTP methods like GET, POST, PUT, and DELETE access and modify resources like ... Read More

The document.getElementById() method allows us to access any HTML element using its id in JavaScript. Every webpage can contain only a single HTML element with a single id. You can use the below example code to access any HTML element using its id. let element = document.getElementById('id'); In the above code, we used the getElementById() method of the document object and passed the id as a parameter. Now, if we require to access multiple elements using their id, it is not a good idea to use a document.getElementById(), but we can create a shorthand for it and ... Read More

Conditional statements are the most important and basic concept of any programming language. The if-else statement allows us to execute any code block conditionally. We can define the condition for the if statement in braces, and if the condition becomes true, it executes the code of the if block; Otherwise, it executes the code of the else block. Here, we have demonstrated how an if-else statement works in JavaScript. if (condition) { // code to execute when the condition becomes true } else { // ... Read More