Search⌘ K
AI Features
Home
Courses
Learn JavaScript

Quiz: Create a Smart Button

Explore how to combine variables and conditional logic inside button clicks to create interactive, responsive behavior. This quiz helps reinforce your understanding before applying these skills in a mini project.

We'll cover the following...
...
Technical Quiz
1.

Which line of code will correctly respond when a light is ON?

let lightOn = true;
document.getElementById("switch").addEventListener("click", function() {
  // Which of the following lines correctly checks if the light is ON?
  // A, B, C, or D?
});
A.

if ("true") { alert("Light is on!"); }

B.

if (lightOn) { alert("Light is on!"); }

C.

if (lightOn === "true") { alert("Light is on!"); }

D.

if (true) { alert("Light is on!"); }

1 / 3
...