throw在js生成器中的用法

const caughtInsideCounter = (function* () {

  let c = 0;

  while (true) {

    try {

      yield ++c;

    } catch (e) {

      console.log(e);

    }

  }

})();

caughtInsideCounter.next();    // { value: 1, done: false}

caughtIndedeCounter.throw(new Error('An error occurred!'));

// 输出 An error occurred!

// { value： 2, done: false }