Category: JavaScript

Convert JS object to JSON string When working with JavaScript, you may often come across the need to convert a JavaScript object into a JSON string. JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and also easy for machines to parse and generate. There…

JavaScript plus sign in front of function expression As a JavaScript developer, you may have come across the use of a plus sign (+) in front of a function expression. This unary plus operator can be a bit confusing if you’re not familiar with its purpose. In this blog post, we will explore the use…

Using HTML5/Canvas/JavaScript to take in-browser screenshots As a tech professional, you may often find yourself in need of capturing screenshots directly from within a web browser. Whether it’s for documentation, bug reporting, or simply sharing visual information, having the ability to take in-browser screenshots can be incredibly useful. In this blog post, we will explore…

How to get the browser to navigate to URL in JavaScript As a JavaScript developer, you may often need to navigate the browser to a specific URL programmatically. Whether you want to redirect the user to another page or open a new tab with a different URL, JavaScript provides several ways to achieve this. In…

Response to preflight request doesn’t pass access control check – No ‘Access-Control-Allow-Origin’ header If you have ever encountered the error message “Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header”, you are not alone. This error occurs when making a cross-origin request from a web page using JavaScript, and the server does…

Test for existence of nested JavaScript object key When working with JavaScript objects, it is common to encounter situations where you need to check if a nested key exists within the object. This can be particularly useful when you want to avoid errors or handle different scenarios based on the presence or absence of a…

Bootstrap Modal Appearing Under Background One common issue that developers face when using Bootstrap modals is that the modal appears under the background content instead of on top of it. This can be frustrating, but fortunately, there are a few solutions to this problem. Solution 1: Adjusting the z-index The z-index property determines the stacking…

Why do we need middleware for async flow in Redux? Redux is a popular JavaScript library used for managing the state of an application. It provides a predictable and centralized way to handle data flow, making it easier to develop and maintain complex applications. However, Redux itself does not support asynchronous operations out of the…