我目前正在开展一个项目,该项目将根据用户当前时间显示特定时间段内剩余的时间。这是代码。
var periods = [
[ '07:45' , '08:34' ],
[ '08:38' , '09:30' ],
[ '09:34' , '10:23' ],
[ '10:27' , '11:16' ],
[ '11:20' , '12:38' ],
[ '12:42' , '15:55' ],
[ '07:00' , ]
];
updateTimePeriods();
setInterval(updateTimePeriods, 1000); // Update every second
function updateTimePeriods() {
var listEl = document.getElementById('periods');
var now = new Date();
var count = periods.length;
listEl.innerHTML='';
for (var i = 0; i < count; i++) {
if(formatTimeRemaining(timeLeft(now, periods[i][1])).charAt(0)!='–') {
child=listEl.appendChild(document.createElement('LI'));
child.innerHTML = periods[i][0] + ' — ' + periods[i][1]
+ ' => Duration: ' + formatUTCTime(duration(periods[i][0], periods[i][1]))
+ ', Remaining: ' + formatTimeRemaining(timeLeft(now, periods[i][1]));
}
}
}
function duration(start, end) {
var startTime = parseTime(start);
var endTime = parseTime(end);
return endTime.getTime() - startTime.getTime();
}
function timeLeft(now, end) {
var nowTime = parseTime(formatTime(now));
var endTime = parseTime(end);
return endTime.getTime() - nowTime.getTime();
}
function parseTime(timeStr) {
var tokens = timeStr.split(':');
return new Date(1970, 0, 1, parseInt(tokens[0], 10), parseInt(tokens[1], 10));
}
function formatUTCTime(time) {
var date = new Date(time);
return padZero(date.getUTCHours()) + ':' + padZero(date.getUTCMinutes());
}
function formatTime(time) {
var date = new Date(time);
return padZero(date.getHours()) + ':' + padZero(date.getMinutes());
}
function formatTimeRemaining(time) {
var sign = '+';
if (time < 0) { time *= -1; sign = '–'; }
var date = new Date(time);
return sign + padZero(date.getUTCHours()) + ':' + padZero(date.getUTCMinutes()) + ':' + padZero(date.getUTCSeconds());
}
function padZero(n) { return ('00' + n).substr(-2); }
body {
background-color: #A00000;
background-size: cover;
margin: 0;
padding: 0;
}
.outer-box {
border: 3px solid black;
height: true;
width: 75%;
padding: 10px;
margin: 10px auto 10px auto;
border-radius: 10px;
background-color: white;
text-align:center;
}
#periods {
border-radius: 5px;
margin: 20px auto 20px auto;
padding: 5px;
font-weight: bold;
text-align: center;
list-style-type: none;
}
<div class="outer-box">
<ul id="periods"></ul>
</div>
我的目标只是向用户显示当前时间段内剩余的时间而不是所有时间。如果它在一个时间段之间,它显示直到下一个发生的时间量。这个问题一旦发生,我需要告诉他很多时间,直到下一次开始,这发生在另一天。详细说来,目前如果所有时间段都出现,它会显示一个空白区域,因为没有任何内容可以显示,所有时间都是负数。我想显示直到下一天开始时间的时间量。
答案 0 :(得分:0)
您应该在创建新LI元素时中断for循环。这样它应该只显示实际的时间段。
for (var i = 0; i < count; i++) {
if(formatTimeRemaining(timeLeft(now, periods[i][1])).charAt(0)!='–') {
child=listEl.appendChild(document.createElement('LI'));
child.innerHTML = periods[i][0] + ' — ' + periods[i][1]
+ ' => Duration: ' + formatUTCTime(duration(periods[i][0], periods[i][1]))
+ ', Remaining: ' + formatTimeRemaining(timeLeft(now, periods[i][1]));
break;
}
}