What Is JavaScript Used For? — Business Guide
JavaScript is a defined scripting language on the global Internet. It is considered an interpreted language. This means that you do not need to use a compiler to write and then run various scripts, as in many other programming languages. You only need to write a script, in an html document or in a js file, and then load the page in the browser. If everything is done correctly, then you can see the result.
It is not necessary to use a server when running scripts. Various Html files with embedded js, work in the browser. Any developer can write in a text editor without first installing various additional programs. All modern browsers support the javascript programming language. It is a modern and commonly used technology that can work with a variety of mobile devices. By launching the resource on a mobile device, the user gets full access to the necessary information. All additional plugins made using js are launched, providing full blog functionality. For example, the validation process when implementing the registration process.
Site owners make the resource functional and convenient for any user and add special plugins that significantly expand the capabilities of a particular resource. For example, a gallery that opens a picture in full screen. When clicked, it expands in a pop-up window and displays a high-resolution image. This technology has not spared registration either. When filling out the form, the user will receive a message that the login is already present in the database. Also with a password and email, the js validator will automatically suggest the optimal password length and search for a similar entered mailbox.
By installing the required plugin and configuring it, all entered information will be validated on the client side, which saves the user time. You don’t have to wait for a response from the server when sending incorrectly filled fields for errors.
JavaScript cryptocurrency for webmasters and beyond
JSEcoin, which aims to provide publishers with an alternative method of monetizing their sites to banners. In essence, this project allows site or blog visitors to mine cryptocurrency using a small piece of Javascript code embedded in a web resource. The mining algorithm is not the most complicated and not demanding on resources, and the mining process itself does not require a lot of processor time (only the CPU is used in the mining process), so the personal computer remains responsive and works fine, as if the mining process is not running. All this makes the project very interesting for the owners of large sites, with a large number of users who are on the site for debt. In addition, the project will also be of interest to ordinary users, especially those who want to master cryptocurrency, since for mining JSEcoin you do not need to download a wallet and set up pools, programs and equipment for mining, the entire mining process takes place in a browser with an open window of a personal account on site.
As with any programming language, the main task of Javascript is to create a sequence of actions that will lead to a certain result. These can be “if-then” conditions, cycles that create a certain sequence of actions, mathematical calculations. The most important thing is that all these operations can be performed on web pages, in a browser window. Let’s take a look at some examples that demonstrate the capabilities you can get with Javascript.
User interactions and events
Different effects can appear on a web page, depending on what the user is doing. Dropdown menu on the site on mouse over. When you click on the button, hide or show some element on the page. A pop-up window appears when the mouse cursor moves outside the browser window. Background fading and fading effects are implemented in Javascript.
Interact with HTML elements on the page and manage their content and styles
When a certain event occurs (for example, a mouse click or any other), you can change the appearance (CSS styles) of elements on the page. This is all done programmatically. You can also add some HTML tags or attributes to them, also when a certain event occurs.
Moving to a new set of libraries and tools requires a significant investment, but they can pay off in the near future. Main advantages:
- Maintenance is simplified.
- The cost of changes is reduced.
- The process of iterating and implementing new features is accelerated.
- The number of errors is reduced, and stability and performance are improved.
Ultimately, such investments can lower the total value of the property. However, if the client is unable to invest in this project, it is necessary to look for ways to gradually improve the existing code base.
Training based on long-term projects
Some web developers are terrified of colliding with their existing codebase. They call code that they haven’t written in the near future as obsolete. However, the opposite is true. Maintaining one code in a project for several years can provide more knowledge about software development than a few short-lived, sharp-shooting, but just as quickly fading projects. First of all, developers are faced with code that I wrote many years ago. Decisions made many years ago still affect the entire system. The decisions made today determine the long-term fate of the system. But in most cases, it is very difficult to find problems with existing code: it seems that the writing logic is worth keeping, but a different structure is needed. Here are some of the major issues with JavaScript code structure.
