Category: JavaScript

Best way to find if an item is in a JavaScript array As a JavaScript developer, you may often come across situations where you need to check if a specific item exists in an array. There are several ways to accomplish this task, and in this article, we will explore some of the best methods.…

JavaScript objects are a fundamental data structure in the language, allowing developers to store and manipulate data in a key-value format. In many cases, the properties of an object are known and defined in advance. However, there may be scenarios where you need to dynamically add properties to an object with dynamically generated names. The…

How does the ‘Access-Control-Allow-Origin’ header work? When working with JavaScript, you may come across the ‘Access-Control-Allow-Origin’ header. This header is an important part of Cross-Origin Resource Sharing (CORS) and plays a crucial role in determining whether a web page or API request is allowed to access resources from a different origin. By default, web browsers…

Format JavaScript date as yyyy-mm-dd Working with dates in JavaScript can sometimes be a bit tricky, especially when it comes to formatting them in a specific way. In this blog post, we will explore different methods to format a JavaScript date as yyyy-mm-dd. Method 1: Using the toISOString() method The toISOString() method is a built-in…

What is a good regular expression to match a URL? When working with JavaScript, it is common to encounter situations where you need to validate or extract URLs from strings. Regular expressions (regex) are a powerful tool for pattern matching and can be used to solve this problem. In this article, we will explore a…

When it comes to creating a secure password, it’s important to have certain requirements in place to ensure the strength of the password. One common requirement is to have a password that contains at least eight characters, at least one number, both lower and uppercase letters, and special characters. In this blog post, we will…

How to dispatch a Redux action with a timeout? When working with Redux, there might be cases where you need to dispatch an action with a delay or after a certain period of time. This can be useful for scenarios like showing a notification for a few seconds or delaying an API call. In this…

ECMAScript 6 Arrow Function That Returns an Object ECMAScript 6 (ES6) introduced arrow functions, which provide a concise syntax for writing JavaScript functions. One of the advantages of arrow functions is that they can simplify the process of returning objects. In this blog post, we will explore how to use arrow functions to return objects…

How can I wait In Node.js (JavaScript)? I need to pause for a period of time When working with Node.js, there may be times when you need to introduce a pause or delay in your code execution. This can be useful in various scenarios, such as waiting for an API response or simulating a delay…

How to Get the Image Size (Height & Width) Using JavaScript As a web developer, you may often come across situations where you need to retrieve the dimensions (height and width) of an image using JavaScript. Whether you want to dynamically adjust the layout of your webpage or perform some calculations based on the image…