js使用yield

function* generatorFunction() {
  yield 1;
  yield 2;
  yield 3;
}

const generator = generatorFunction();

function* simpleGenerator() {
  yield 'Hello';
  yield 'World';
}

const gen = simpleGenerator();

console.log(gen.next()); // { value: 'Hello', done: false }
console.log(gen.next()); // { value: 'World', done: false }
console.log(gen.next()); // { value: undefined, done: true }

function* errorHandlingGenerator() {
  try {
    yield 'Start';
    throw new Error('Something went wrong');
    yield 'End'; // 这行代码不会被执行
  } catch (e) {
    console.error(e.message); // 输出: Something went wrong
    yield 'Recovered';
  }
}

const errorGen = errorHandlingGenerator();

console.log(errorGen.next()); // { value: 'Start', done: false }
console.log(errorGen.next()); // 抛出错误并捕获: Something went wrong
console.log(errorGen.next()); // { value: 'Recovered', done: false }
console.log(errorGen.next()); // { value: undefined, done: true }