JS Practice — Built-in Objects

Reflect.set() — set array element

📖 Usage Example

const obj = {}
Reflect.set(obj, 'name', 'Alice')
console.log(obj.name) // → 'Alice'
// Equivalent to: obj['name'] = 'Alice'

Reflect.set() assigns a value to a property on an object, returning true on success.

Reflect.set() on arrays

Reflect.set() can set elements on arrays using a numeric index.

Challenge: Verify that after Reflect.set(arr, 0, 'first'), arr[0] === 'first'.

💡 Hints (1)