Question

我对Javascript和Web编程非常陌生，目前正在学习localStorage，并且找到了一些代码，并尝试对其进行修改。我想做的是，当设置的时间到了时，我想调用另一个名为任何功能的功能。请帮忙。

注意：如果在堆栈溢出规则方面有任何问题，请告诉我。我将编辑并删除问题。

JS

var finishTime;
var timerLength = 10;
var timeoutID;
dis.innerHTML = "Time Left: " + timerLength;


if(localStorage.getItem('myTime')){
    Update();

}


$('#save').click(function () {
    localStorage.setItem('myTime', ((new Date()).getTime() + timerLength * 1000));
    if (timeoutID != undefined) window.clearTimeout(timeoutID);
    Update();

});

function Update() {
    finishTime = localStorage.getItem('myTime');
    var timeLeft = (finishTime - new Date().getTime());
    dis.innerHTML = "Time Left: " + Math.max(timeLeft/1000,0);

    if(timeLeft <= 0){
      console.log('please work');
    }else{
       timeoutID = window.setTimeout(Update, 100);
    }
}

视图

<p id="display">Time Left
    <p>
        <button id="start">Start</button>

Answer 1

没有尝试您的代码，但是这一行：

var timeLeft = (finishTime - new Date());

不应该吗？

var timeLeft = (finishTime - new Date().getTime());

添加了.getTime()

编辑： function Update() { finishTime = localStorage.getItem('myTime'); var timeLeft = (finishTime - new Date().getTime()); dis.innerHTML = "Time Left: " + Math.max(timeLeft/1000,0);

if (timeLeft <= 0){ localStorage.removeItem('myTime'); //<=remove whateversomethingfunctuin(); // console.log('Seems'); } else { //call only when needed timeoutID = window.setTimeout(Update, 100); } }

计时器和本地存储问题

1 个答案: