What is JavaScript?
JavaScript (JS) is a high-level, interpreted programming language mainly used to make websites interactive and dynamic. It runs inside the browser and allows you to control webpage behavior like clicking buttons, showing messages, validating forms, etc. It is one of the core technologies of the web along with: •HTML → Structure •CSS → Styling •JavaScript → Behavior Key Features of JavaScript Client-side scripting (runs in browser) •Dynamic typing (no need to declare data types) •Event-driven (responds to user actions like clicks) •Object-oriented (supports objects and classes) •Asynchronous (handles tasks like API calls) Simple JavaScript Code: <!DOCTYPE html> JavaScript Example Hello World Click Me function changeText() { document.getElementById("demo").innerHTML = "Text Changed!"; } Explanation: •button → When clicked, it calls a function •changeText() → JavaScript function •document.getElementById() → Selects HTML element •innerHTML → Changes the content
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