JS Practice — Built-in Objects

Function.prototype.apply() — basic usage

📖 Usage Example

function add(a, b) { return a + b }
add.apply(null, [3, 4])  // → 7

apply() invokes a function with a specified this and an array of arguments.

fn.apply(thisArg, argsArray)

apply() is like call() but takes arguments as an array instead of individually.

Challenge: Use add.apply(null, [2, 3]) and verify the result is 5.

💡 Hints (1)