捕获从setInterval内部抛出的异常

Question

捕获setInterval内部错误的最佳方法是什么？目前，从下面的代码中，抛出异常后，控件无法到达catch。

    try {

        timer = setInterval(() => {
            if (moment().diff(lastProcessTime, 'minute') >= 2) {
                // Taking too long!
                clearInterval(timer);
                throw new Error({ code: -1, message: `Taking too long to response:: ${urls[0]}` });
            }
        }, 1000);


        await c.downloadAndSaveDataFromRssUrls(configs, urls);
        clearInterval(timer);
        return Promise.resolve();
    } catch (err) {
        clearInterval(timer);
        console.log(err);
        return Promise.resolve();
    }

Answer 1

您需要将try catch移到setInterval内  ：

function greet() {
  let i = setInterval(() => {
    try {
      if (Math.random() * 100 > 5) {
        clearInterval(i);
        throw new Error("Number is greater than 5");
      }
    } catch (err) {
      console.log('Hello')
      console.log(err);
    }
  }, 1000);
}

greet();