The coding language that adds design elements to a web page is Cascading Style Sheets (CSS). CSS is used to define the layout, style, and presentation of a webpage. It allows developers to control the appearance of elements on a webpage, including fonts, colors, backgrounds, borders, and more. CSS works in conjunction with HTML, the markup language used to structure the content of a webpage, and JavaScript, the programming language used to add interactivity to a webpage.
JavaScript is event-driven because it is designed to respond to user interactions and other events that occur within a web page. When a user interacts with a webpage, such as clicking a button or hovering over an element, an event is triggered. JavaScript can be used to create event handlers that respond to these events and perform actions, such as updating the content of the page or displaying a message to the user. Because JavaScript is event-driven, it allows web developers to create dynamic and interactive user experiences on the web.
A function in JavaScript is a block of code designed to perform a specific task. All functions in JavaScript have a function name, a set of parentheses, and curly brackets that contain the code to be executed. Calling a function executes the code inside it and returns a value. To pass a function arguments means to provide values or variables to the function that it can use to perform its task. This allows for flexibility and reusability of the function. The purpose of the return keyword in functions is to specify the value that the function will return when it is called. Without a return statement, the function will execute but not provide any value back to the calling code. The return statement can also be used to terminate a function prematurely if necessary.