Error handling is a very important topic, not only in JavaScript but also in development in general. Let’s face it. Even if you write the most perfect code, once you put your code outside of the local environment to users to use, chances are, your code will fail eventually. Your code can fail due to numerous reasons, for example, user can enter some erroneous data or they can have networking issues. When this happens, it is important to show the user informative and appropriate error message. Otherwise, you may cause frustration on the user end, which is something that either the programmer nor the user want. So let’s take a look at the example of how we can handle errors in JavaScript.

Testing is a crucial step in the app development cycle. The app needs to be tested before the final deployment to ensure that it has the load management capabilities and can perform the task under extreme working conditions and workload.

There is the number of open source testing tools available in java language, which are used by test engineers and Quality Assurance teams to validate and verify the developed applications before the final deployment. Let’s look at famous four java testing tools, that are widely used by test engineers and quality assurance teams.

Coding anything requires a lot more effort than many believe. The bigger the project, the more difficult to code; you have to take performance, sustainability, updatability, security and so much more into account.

Below, you can find out 7 KILLER tips for making sure your Javascript code is lean and bulletproof:

Performance

• Try to place as many scripts as you can at the bottom of your document. If you have a script that’s the only purpose is to add some sort of functionality, like when a button is clicked or a form is submitted, place it at the bottom. A website will load a Javascript file at the top before it renders the rest of the page, so it’s best to get the content to the user as quickly as possible.

JavaScript and jQuery both tend to be client-side scripting libraries employed for tasks for examples like validation checking, creating visually attractive elements such as fancy routing menus and so on. Since the objective of both the actual technologies may be the same, the option of utilizing a particular technology lies within the thinking of the programmer. However recently, jQuery is actually quickly gaining interest over JavaScript. Here we can review some of the main 3 differences between these two scripting languages.

Variables are used to store values. Variable names can have uppercase letters (A-Z), lowercase letters (a-z), digits (0-9), underscore ( _). The first character should be an alphabet or an underscore. Variables cannot have blank spaces or other punctuation marks. Variables are case sensitive. Variables names can be of any length. Variables are defined with the optional keyword var. Unlike other programming languages,JavaScript does not require you to specify the type of data contained in a variable. The same variable can hold different values such as String, Integer, Boolean, etc.,