Javascript 如何判断setInterval是否是'；正在阻止应用程序退出

有没有办法知道节点必须完成多少任务，流程才会自动退出，因为没有其他事情要做？我想使用

setInterval

，但只能在应用程序繁忙时使用。我不想阻止进程自动触发退出事件：

// an app that does serveral things, then finishes

// this should only be active whilst the app is busy:
var interval = setInterval(function(){
    // some stuff

    // how to determine if the interval is the last thing to complete?
    if(process.lastThingToDo == interval)
        clearInterval(interval);
}, 2500);

---

如果您希望使用的计时器仍能像正常计时器一样工作，但不会阻止进程退出，则可以对其使用

.unref（）

// an app that does serveral things, then finishes

// this should only be active whilst the app is busy:
var interval = setInterval(function(){
    // some stuff

    // how to determine if the interval is the last thing to complete?
    if(process.lastThingToDo == interval)
        clearInterval(interval);
}, 2500);

// add this .unref() call to make it so the process will not wait for this timer
// before exiting, but the timer will otherwise work normally
interval.unref();

请参阅带有计时器的列表