Promisebeginner

Promise — instanceof

📖 Usage Example

const p = new Promise((resolve, reject) => {
  setTimeout(() => resolve(42), 100)
})
p.then(v => console.log(v))  // → 42

The Promise constructor takes an executor function with resolve and reject callbacks to create a new promise.

Promise Constructor

new Promise((res) => res(1)) instanceof Promise is true.

Challenge: Verify the instanceof check.

💡 Hints (1)

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