javascript 确定到午夜的分钟数
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时间：2020-10-26 03:53:42 来源:igfitidea点击:
Determine minutes until midnight
提问by Pastor Bones
How would you go about determining how many minutes until midnight of the current day using javascript?
您将如何使用 javascript 确定距当天午夜的分钟数？
回答by RobG
Perhaps:
也许：
function minsToMidnight() {
var now = new Date();
var then = new Date(now);
then.setHours(24, 0, 0, 0);
return (then - now) / 6e4;
}
console.log(minsToMidnight());or
或者
function minsToMidnight() {
var msd = 8.64e7;
var now = new Date();
return (msd - (now - now.getTimezoneOffset() * 6e4) % msd) / 6e4;
}
console.log(minsToMidnight())and there is:
并且有：
function minsToMidnight(){
var d = new Date();
return (-d + d.setHours(24,0,0,0))/6e4;
}
console.log(minsToMidnight());回答by Will
function minutesUntilMidnight() {
var midnight = new Date();
midnight.setHours( 24 );
midnight.setMinutes( 0 );
midnight.setSeconds( 0 );
midnight.setMilliseconds( 0 );
return ( midnight.getTime() - new Date().getTime() ) / 1000 / 60;
}
回答by kennebec
You can get the current timestamp, set the hours to 24,
您可以获取当前时间戳，将小时数设置为 24，
and subtract the old timestamp from the new one.
并从新时间戳中减去旧时间戳。
function beforeMidnight(){
var mid= new Date(),
ts= mid.getTime();
mid.setHours(24, 0, 0, 0);
return Math.floor((mid - ts)/60000);
}
alert(beforeMidnight()+ ' minutes until midnight')
警报（beforeMidnight（）+ '分钟直到午夜'）
