Generator.prototype.throw()

Baseline

20169

throw() Generator throw

generatorInstance.throw(exception)

exception: instanceof Error

2 Object

done

true
false

value

yield

TypeError

exception try...catch throw()

throw() throw exception; exception throw() throw(exception) yield try...catch

throw()

throw try...catch

function* gen() {
  while (true) {
    try {
      yield 42;
    } catch (e) {
      console.log("Error caught!");
    }
  }
}

const g = gen();
g.next();
// { value: 42, done: false }
g.throw(new Error("Something went wrong"));
// "Error caught!"
// { value: 42, done: false }


ECMAScript 2027 LanguageSpecification # sec-generator.prototype.throw

function*

MDN

MDN 2026523

GitHub

Generator
Iterator
1. Iterator()
Object/Function
1. __proto__
2. constructor