Props and JSX in React
React interview exercise on Components & JSX, difficulty 1 of 3. Solve it in the editor beside a worked example, or cold in Interview mode with the example hidden; the tests run the moment you do.
Write Greeting: props `name` (required) and `excited` (default false). Render <p className="greeting"> reading "Hello, <name>!" when excited and "Hello, <name>." otherwise.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Interview mode hides the example: solve it from memory, without the hint or the solution, and it counts as solved cold. Progress is saved in your browser, and in your account if you sign in.