JavaScript is a programming language used to create interactive and dynamic behavior on websites. It’s one of the core technologies of web development, along with HTML (structure) and CSS (style).
What JavaScript Does
JavaScript makes websites come alive. It controls how web pages behave in response to user actions. For example:
Displaying a popup message
Showing or hiding content
Validating form input (e.g., checking if an email is entered correctly)
Loading new content without refreshing the page (like in social media feeds)
Creating animations or interactive maps