详细内容如下：

1、定义一个生成器

function * gen() {
    for(let i = 1; i <= 5; i++) {
        yield i;
    }
}

2、手动判断状态(setInterval)

const g = gen();
const timer = setInterval(() => {
    var v = g.next();
    if (v.done) {
        console.log('done');
        clearInterval(timer);
    } else {
        console.log('[value]', v.value);
    }
}, 1000);

3、自动判断状态(setTimeout)

(async  () => {
    const g = gen();
    for(const v of g) {
        await new Promise(resolve => {
            setTimeout(() => {
                resolve();
                console.log(v);
            }, 1000);
        });
    }
})();

4、示例1

const btn = {
  btnOk: {
    elem: getElem('btnOk'),
    action(dom, e) {
      if(dom.submit) {
        return;
      }
      dom.submit = true;
      const g = gen();
      const title = dom.textContent;
      const timer = setInterval(() => {
        const v = g.next();
        if(v.done) {
          clearInterval(timer);
          dom.textContent = title;
          dom.submit = false;
        } else {
          dom.textContent = `${title} (${v.value})s`;
        }
      },1000);
    }
  }
};

['btnOk'].forEach(type => {
  btn[type].elem.addEventListener('click', e => {
    return btn[type].action(btn[type].elem, e);
  });
});

示例图例

image.png

5、示例2

const btn = {
  btnOk: {
    elem: getElem('btnOk'),
    async action(dom, e) {
      if(dom.submit) {
        return;
      }
      dom.submit = true;
      const N = 5;
      const title = dom.textContent;
      const g = gen();
        for(const v of g) {
            await new Promise(resolve => {
                setTimeout(() => {
                    dom.textContent = `${title} (${v})s`;
                    if(v === N) {
                      dom.textContent = title;
                      dom.submit = false;
                    }
                    resolve();
                }, 1000);
            });
        }
    }
  }
};

['btnOk'].forEach(type => {
  btn[type].elem.addEventListener('click', e => {
    return btn[type].action(btn[type].elem, e);
  });
});

image.png