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Articles by Shubham Vora
Page 8 of 80
How to create asynchronous function in TypeScript?
Asynchronous programming allows us to perform multiple tasks without blocking code execution. In TypeScript, we use the async/await keywords to create asynchronous functions that handle promises elegantly. Before diving in, let's understand why asynchronous programming is essential. When fetching data from APIs or performing I/O operations, these tasks take time to complete. In single-threaded languages like TypeScript and JavaScript, synchronous code would block execution until the operation finishes, leading to poor performance. Asynchronous functions solve this by allowing other code to execute while waiting for time-consuming operations to complete. The await keyword pauses execution only within the async ...
Read MoreHow to solve too many try catch in Typescript?
We can use the try-catch statements to handle errors in TypeScript. Sometimes, we require adding more than one try-catch block in the code to handle multiple errors. When we add multiple try-catch statements in the code, the code becomes unreadable, and it becomes a headache for developers to refactor. In this tutorial, we will learn to convert too many try-catch blocks into a single try-catch block which can manage multiple errors. Syntax Users can follow the syntax below to use the single try-catch block in TypeScript. try { throw new Error("error_message"); ...
Read MoreHow to Develop Generic Classes
Generic classes in TypeScript allow you to create flexible, reusable classes that can work with multiple data types. They use type parameters enclosed in angle brackets () to represent the type of data the class will handle, making your code more versatile and type-safe. A generic class uses type parameters (commonly denoted as "T") as placeholders for actual types. When you instantiate the class, you specify the concrete type, and the class properties and methods adapt accordingly. This approach eliminates code duplication while maintaining type safety. Syntax The basic syntax for creating a generic class in TypeScript ...
Read MoreHow to Enforce the type of the indexed members of a Typescript object
TypeScript is a strongly typed, object-oriented programming language built on JavaScript. One of its powerful features is the ability to enforce types of an object's indexed members using index signatures. This allows you to define the shape of objects with dynamic properties while maintaining type safety. An index signature specifies the types for both keys and values in an object. It's particularly useful when you need objects with unknown property names but known value types. Syntax interface ObjectType { [key: string]: ValueType; } // Or inline let objectName: { [key: string]: ...
Read MoreHow to use Particle.js in JavaScript project?
Particle.js is a JavaScript library that creates stunning visual effects by adding animated particles to HTML elements. You can customize particle shapes, colors, motion, and interactions to enhance your web projects with dynamic backgrounds and visual effects. This library is perfect for creating engaging landing pages, interactive backgrounds, and modern web interfaces with floating particles that respond to user interactions. Syntax The basic syntax to initialize particles using the tsParticles library: tsParticles.load("elementId", { particles: { // Configuration options for particles ...
Read MoreHow to use Regex to get the string between curly braces using JavaScript?
We can create a regular expression to find all substrings between curly braces and use methods like exec() or match() to extract them. In this tutorial, we will learn to use regular expressions to get strings between curly braces in JavaScript. For example, from the string 'This is a {string} with {curly} braces', we need to extract "string" and "curly". Using the exec() Method with Regular Expression The exec() method finds matched substrings and returns results in array format. It returns null if no matches are found. Syntax var regex = /{([^}]+)}/g; while (match ...
Read MoreExplain the Scope and Scope Chain in JavaScript
In JavaScript, the scope defines how and in which part of our code we can access the variables and functions. In simple terms, the scope helps us improve our code's security and readability. So, we can access the variables and functions only inside its scope but not outside. We will discuss multiple types of scopes in this tutorial. Global Scope in JavaScript The variables and functions defined globally mean outside all blocks and functions with global scope. We can access all variables and functions with the global scope anywhere inside our code. Syntax Users can ...
Read MoreHow to use Selenium Web Driver and JavaScript to Login any website?
Nowadays, automation is very useful for testing applications. Many automation tools are available, and Selenium is one of them, developed in 2004. Also, it is a cross-platform tool, so we can use Selenium with most programming languages, and here we will use it with JavaScript. Users need to create a Node.js application to use the Selenium WebDriver with JavaScript. Setting Up Node.js Application Follow these steps to create a Node.js application for Selenium automation: Step 1: Initialize a new Node.js project npm init -y Step 2: Install the Selenium WebDriver package ...
Read MoreExplain the benefits of spread syntax & how it is different from rest syntax in ES6?
In the ES6 version of JavaScript, spread syntax is introduced as a very powerful feature. We can use the spread syntax to expand the array or objects into the variable of the same data type. For example, before the spread syntax was introduced in the ES6, developers were using the for loop to copy all elements of one array to another array. Can you copy all elements of one array to another by writing one linear code using the spread syntax rather than writing the 5 to 7 lines of code using the for loop? Yes, you heard right! ...
Read MoreExplain the differences in the usage of foo between function foo() {} and var foo = function() {}
In JavaScript, there are two primary ways to define functions: function declarations and function expressions. While both achieve similar results, they behave differently in terms of hoisting and evaluation timing. Function Declaration: function foo() {} Function declarations use the function keyword followed by the function name. They are hoisted to the top of their scope, meaning you can call them before they're defined in the code. Syntax function foo(parameters) { // function body } Example: Basic Function Declaration ...
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