JS Practice — Built-in Objects

Proxy get trap — append ! to key

📖 Usage Example

const p = new Proxy({}, {
  get: (target, key) => 'got ' + String(key)
})
console.log(p.foo) // → 'got foo'
console.log(p.bar) // → 'got bar'

The get trap intercepts property reads on a proxy, letting you return custom values for any key instead of actual target values.

Proxy get trap

The get trap intercepts property reads. Use it to transform the key.

Challenge: Verify that a proxy with get: (t, k) => k + '!' returns 'foo!' for p.foo.

💡 Hints (1)

• The `get` trap receives `(target, key, receiver)` — use `key` to build the return value.