Javascript is one of the most popular programming languages used in website development. It is a scripting language that allows you to add interactivity, dynamism and functionality to web pages.
Developed in 1995 by Brendan Eich, Javascript is an interpreted language, that is, it does not need to be compiled to be executed. This means that code written in Javascript is interpreted directly by the user's browser.
One of the main advantages of Javascript is its ability to manipulate the HTML and CSS of web pages. With it, you can create visual effects, validate forms, create animations, among other features.
In addition, Javascript also allows the use of libraries and frameworks, such as jQuery, React and Angular, which facilitate the development of more complex and sophisticated projects.
To use Javascript on a web page, you need to insert the code inside the <script></script> tags. These tags can be placed either in the header or in the body of the HTML document.
There are several ways to write code in Javascript, from the most basic to the most advanced. Some of the main structures of the language are:
- Variables: are used to store values and information that will be used later in the code;
- Conditional: allow the execution of a certain block of code according to a specified condition;
- Repeating loops: allow the execution of a block of code several times;
- Functions: are blocks of code that can be called in different parts of the program, allowing code reuse;
- Objects: allow the creation of more complex data structures and functionalities.
In summary, Javascript is an essential language for the development of modern and interactive websites. With it, it is possible to create functionalities and visual effects that make the user experience more pleasant and intuitive.
