Great user experience on the web comes from being able to provide users with exactly what they want in the most seamless way possible. Behind the scenes, some user actions may take more time to process than others. For example, showing or hiding an HTML element is a quick operation whereas making an XHR request to get data from an external API is a slower operation. JavaScript provides us with a way to handle them all without giving up that instant delight users naturally expect.

A constructor is a special function that creates and initializes an object instance of a class. In JavaScript, a constructor gets called when an object is created using the new keyword. The purpose of a constructor is to create a new object and set values for any existing object properties.

A constructor is a special function that creates and initializes an object instance of a class. In JavaScript, a constructor gets called when an object is created using the new keyword. The purpose of a constructor is to create a new object and set values for any existing object properties.

The TypeError: Cannot read property of undefined is one of the most common type errors in JavaScript. It occurs when a property is read or a function is called on an undefined variable. Error message: Error Type.

Congratulations on getting to part 4 of the “A beginner’s guide to test automation with Javascript (Nighwatch.js)” blog series! This part will help you to improve your test script (and make it cooler). We’ll explain different style suggestions and the overall script structure that we follow in Loadero to bring your script to a new level.

Imagine that a customer reports an error on one of your websites. When you check the logs or tracking tool, it just says script error and nothing else. Does it sound familiar? Such errors are difficult to debug because they do not contain additional information about what and where they went wrong.

JavaScript is an awesome language to create fantastic client-side apps. You can use it to drive interactive elements and create engaging single-page applications to woo your customers. More importantly, most developers are familiar with JavaScript and can provide you top expertise for your project. Most of the JavaScript developers at hiring platforms like Reintech are adept at crafting innovative solutions for your unique business problems.

When you do calculations with money, every penny needs to be accounted for. Unfortunately, JS's Number type isn't up to the task. In this article, Julio Sampaio shows us why and teaches us how to do currency calculations the right way in JavaScript.

The latest release of Klocwork features the launch of JavaScript, which greatly enhances the static analysis and SAST tool’s offerings. In addition, the release includes a number of other significant improvements that greatly enhance the tool’s performance and functionality. Here, we provide an overview of the new analysis engine.

No matter what you’re coding, there’s always room to optimize your code and improve performance. This can be a painstaking process, and if you’re going over your code line by line you’d better cancel all your plans and forget about getting any sleep! Fortunately, there are better ways to examine and optimize your code. A JS profiler is an efficient tool to help you understand your code better – effectively finding, pinpointing and optimizing bottlenecks in your code.