Exercise 6: Toggle Class on Element
Problem Statement
Function `toggleClass(el, className)` banao jo element pe class toggle kare.
Example: toggleClass(buttonEl, "active") → class add/remove karega
Sample Output:
toggleClass(buttonEl, "active") // If class exists: removes it // If class doesn't exist: adds it
Solution
const toggleClass = (el, className) => el?.classList.toggle(className);Explanation
Overall Goal:
- Element pe class toggle karna.
Real world:
- UI states: active/inactive toggle.
- Animations: class-based animations.