What Is JavaScript?

JavaScript is a popular programming language that is used to build websites. It is one of the main technologies of the World Wide Web, along with HTML and CSS. It is commonly used to define page behavior and incorporate third-party libraries. Nearly ninety percent of websites incorporate some form of JavaScript into their pages.

Client-side JavaScript

JavaScript is a scripting language that is used to create interactive web applications. It can be either server or client-side. Server-side JavaScript executes on a computer that hosts a JavaScript runtime engine. Client-side JavaScript is used in HTML pages. These pages may contain a mixture of both types of JavaScript statements.

Client-side JavaScript is embedded into HTML using event handler attributes. These attributes begin with “on.” In the table below, you’ll find the HTML tags you can apply these attributes to. You’ll also find a list of events that trigger the code. Client-side JavaScript programmers can use these attributes to add custom logic to their pages.

Client-side JavaScript is also useful for interacting with HTML forms. It provides form element objects to read and write input values. For example, an online catalog might use a form to allow visitors to place orders. In this case, JavaScript could read the input values from the form and use this information to compute shipping costs, taxes, and other fees.

It uses string and number casting

Strings and numbers are both types of data that can be represented in JavaScript. There are a variety of methods for string-to-number conversion. For instance, you can use parseFloat() to convert a string to an integer. If the string is composed of other characters, parseFloat() will return a NaN value.

Number-to-string conversion can be done in one of three ways: by using arithmetic operators. ParseInt() and parseFloat() take an argument, the base of the number. Using these operators can be extremely helpful when working with numbers. They will automatically convert a string to a number when used properly.

String-to-number conversion in JavaScript is relatively easy using the parseInt() function. This function takes a string and returns an integer of the specified base. In case of a string that doesn’t contain a number, it will return a nan (no-number).

It allows for dynamic interactivity

JavaScript is a powerful and lightweight interpreted programming language that allows for dynamic interactivity on websites. Unlike HTML, it does not require any plugins to function and is compatible with most browsers. This language enables richer interfaces and increased interactivity. However, it cannot be used for networking applications or for multi-threading, as it lacks the necessary features.

In addition to allowing for dynamic interactivity, JavaScript can also be used to create web applications. Those web applications can be run directly by a web browser, which makes them instantly accessible and as functional as standard programs. JavaScript is particularly useful for building interactive features, such as the ability to click on a street sign to see a detailed map of the area.

It is lightweight

JavaScript is a lightweight language that requires minimal resources to run. Its minimalist syntax and limited set of language constructs make it perfect for any application requirement. It uses dynamic typing, where variables are assigned their type at runtime. Because it treats everything as an object, it is simple to create applications. JavaScript also offers built-in operations and options, making it easy to create complex web applications.

JavaScript is an object-oriented scripting language developed by Netscape Communications Corporation for building web applications. It’s easy to learn, and unlike other languages, it doesn’t require a compiler or a graphical user interface to run. Its main function is to tell an application what to do. Without an application, JavaScript is a plain text script that can do nothing.

It is not polluted by JavaScript

The fact that JavaScript is now a standard language in all browsers makes it a very desirable choice for many developers. Although it is not perfect, it has many benefits over other languages and is used to build most of the web. As a language, JavaScript has evolved quite a bit, making it easier to implement new features and avoid namespace conflicts. Despite this, it is not as clean as one would like.

JavaScript uses prototypes instead of classes, which means that new objects inherit the properties and behaviors of their prototype. This approach provides efficiency and flexibility, but it also makes JavaScript vulnerable to object manipulation. This feature is easily manipulated using static methods, which means that malicious attackers can modify objects in an application.