JS Practice — Built-in Objects

Symbol.toPrimitive — string hint

📖 Usage Example

const tag = {
  [Symbol.toPrimitive](hint: string) {
    return hint === 'string' ? 'Hello' : 0
  }
}
`${tag}`   // → 'Hello'

Template literals trigger the 'string' hint, calling [Symbol.toPrimitive] with hint === 'string'.

Custom Coercion with String Hint

Template literals trigger the 'string' hint when an object has [Symbol.toPrimitive].

Challenge: Verify that template literal coercion triggers the string hint.

💡 Hints (1)