在一天中的特定时间调用 javascript 函数

例如，我想在10.00.00.00 am 调用一个 js 函数 我该怎么办？

<script type="text/javascript">


var now = new Date();


var millisTill10 = new Date(now.getFullYear(), now.getMonth(), now.getDate(), 0, 30, 0, 0) - now;


setTimeout(function{openAPage(), setInterval(openAPage, 60*1000)}, millisTill10)


function openAPage() {


var startTime = new Date().getTime();
var myWin = window.open("http://google.com","_blank")
var endTime = new Date().getTime();
var timeTaken = endTime-startTime;




document.write("<br>button pressed@</br>")
document.write(new Date(startTime));
document.write("<br>page loaded@</br>")
document.write(new Date(endTime));
document.write("<br>time taken</br>")
document.write(timeTaken);


myWin.close()


}


</script>

我期望从这个代码在0.30它会打开谷歌，然后每1分钟后，它会再次这样做？那个代码有什么问题吗？

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小开
最佳答案

You'll need setTimeout to set a timer and Date to calculate how long the timer needs to go until it triggers.

var now = new Date();
var millisTill10 = new Date(now.getFullYear(), now.getMonth(), now.getDate(), 10, 0, 0, 0) - now;
if (millisTill10 < 0) {
millisTill10 += 86400000; // it's after 10am, try 10am tomorrow.
}
setTimeout(function(){alert("It's 10am!")}, millisTill10);
小开

Assuming the code is located on a web page that will be loaded before 10:00 and will still be viewed at 10:00, you can use setTimeout() to set up a timed event. the function takes some JS statement to execute, and the number of milliseconds before it should execute. You can find this second part pretty easily with the built-in date functions.

小开

My solution for running a script at a specific time, btw no error checking for negative timeout.

//year, month 0-11, date, hour, min (can add ,sec,msec)
var eta_ms = new Date(2015, 0, 21, 17, 0).getTime() - Date.now();
var timeout = setTimeout(function(){}, eta_ms);
小开

Try this

$(document).ready(function() {
setTimeToTrigger();
});


function setTimeToTrigger(){
var dt = new Date();
var hour = dt.getHours();
var minute = dt.getMinutes() ;
var seconds = dt.getSeconds();


if(hour<10){
nexthour=9;
}else if(hour<22){
nexthour=21;
}else{
nexthour=23-hour+9;
}
delaytime=(nexthour-hour)*60*60+(59-minute)*60+(59-seconds);
alert('will be triggered in :'+ delaytime + ' seconds');
setTimeout( function() {
alert("The time is 10:00");
}, delaytime*1000);
}
<html>
<head>
<title>alert at specific time</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
</head>
<body>
<h3>Alert at at 10:00 AM and 10:PM</h3>
</body>
</html>


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