JavaScript works by allowing developers to write code that can be executed by web browsers. When a web page is loaded, the browser reads the HTML and CSS code to create the structure and appearance of the page, and then executes any JavaScript code that is included on the page.
JavaScript code is executed on the client-side, meaning that it is executed on the user’s computer rather than on the web server. This allows for dynamic and interactive functionality to be added to web pages, such as form validation, animations, and user interface enhancements.
JavaScript code can also interact with other technologies such as HTML and CSS, as well as web APIs (Application Programming Interfaces) that allow access to data and functionality provided by web servers and other sources.
Common uses of JavaScript
JavaScript is used to enhance the functionality of web pages in a variety of ways.
Some common uses of JavaScript include:
- Form validation: JavaScript can be used to validate user input on forms to ensure that it meets certain criteria, such as a required field or a valid email address.
- User interface enhancements: JavaScript can be used to create interactive elements such as drop-down menus, sliders, and pop-up windows that make web pages more engaging and user-friendly.
- Animation and visual effects: JavaScript can be used to create animations and visual effects such as sliding panels, fading images, and scrolling text that add visual interest to web pages.
- Data manipulation: JavaScript can be used to manipulate data on web pages, such as filtering and sorting tables, or performing calculations based on user input.
