Understand variable declaration and use in JavaScript, primitive and dynamic data types, and implicit conversions.

Use objects and functions, including methods, properties, this keyword, arrow functions, and callbacks.

Interact with the DOM, handle browser events, and use event listeners for dynamic responses.

Identify and fix errors using debugging tools, console, and exception handling with try/catch.

Write asynchronous code using callbacks, Promises, and async/await for non-blocking operations.

Understand the importance of testing, write unit tests, and manage the build and deployment process of JavaScript applications.