我的网站上有一个倒计时时钟,但如果您清除浏览器历史记录,它会重置。有没有办法阻止这种情况发生。我在网站上找到了可以从中下载的代码。清除浏览器历史记录时,我没想到会重置它。可以修改此代码,还是为我找到另一个代码更好。
由于
function getTimeRemaining(endtime) {
var t = Date.parse(endtime) - Date.parse(new Date());
var seconds = Math.floor((t / 1000) % 60);
var minutes = Math.floor((t / 1000 / 60) % 60);
var hours = Math.floor((t / (1000 * 60 * 60)) % 24);
var days = Math.floor(t / (1000 * 60 * 60 * 24));
return {
'total': t,
'days': days,
'hours': hours,
'minutes': minutes,
'seconds': seconds
};
}
function initializeClock(id, endtime) {
var clock = document.getElementById(id);
var daysSpan = clock.querySelector('.days');
var hoursSpan = clock.querySelector('.hours');
var minutesSpan = clock.querySelector('.minutes');
var secondsSpan = clock.querySelector('.seconds');
function updateClock() {
var t = getTimeRemaining(endtime);
daysSpan.innerHTML = t.days;
hoursSpan.innerHTML = ('0' + t.hours).slice(-2);
minutesSpan.innerHTML = ('0' + t.minutes).slice(-2);
secondsSpan.innerHTML = ('0' + t.seconds).slice(-2);
if (t.total <= 0) {
clearInterval(timeinterval);
}
}
updateClock();
var timeinterval = setInterval(updateClock, 1000);
}
var deadline = new Date(Date.parse(new Date()) + 15 * 24 * 60 * 60 * 1000);
initializeClock('clockdiv', deadline);
#clockdiv {
color: #ffffff;
display: inline-block;
font-size: 14px;
font-weight: 100;
text-align: center;
}
#clockdiv > div {
background: #0294cb;
border-radius: 3px;
display: inline-block;
padding: 8px;
}
#clockdiv div > span {
background: #42baff;
border-radius: 3px;
display: inline-block;
padding: 15px;
}
.smalltext {
font-size: 14px;
padding-top: 5px;
}
<div id="clockdiv">
<div>
<span class="days"></span>
<div class="smalltext">Days</div>
</div>
<div>
<span class="hours"></span>
<div class="smalltext">Hours</div>
</div>
<div>
<span class="minutes"></span>
<div class="smalltext">Minutes</div>
</div>
<div>
<span class="seconds"></span>
<div class="smalltext">Seconds</div>
</div>
</div>
答案 0 :(得分:0)
您可以将初始截止时间保存在localStorage中(但这会在删除历史记录时清除)然后使用它而不是在重新加载时重新设置它,如果您希望计时器在清除数据时不重置,则必须维持服务器端状态。
答案 1 :(得分:0)
您可以将这段代码添加到脚本的底部。您不必每次都初始化新的截止日期,而是检查截止日期是否已经初始化并存储在localStorage
中,如果是,则从中获取截止日期。如果不是,请像在原始代码中一样创建新的截止日期,并将其存储在localStorage
中。
请注意,如果要存储并稍后从JSON.stringify
检索对象,则需要使用JSON.parse
和localStorage
方法,因为它只能保存字符串和对象的默认字符串表示形式不是很有用。
此代码不会重置页面重新加载的倒计时,您也可以清除历史记录,但无法清除localStorage
(缓存文件和Cookie)以使其正常工作。
if (!localStorage.getItem('deadline')) {
const deadline = new Date(Date.parse(new Date()) + 15 * 24 * 60 * 60 * 1000);
localStorage.setItem('deadline', JSON.stringify(deadline));
initializeClock('clockdiv', deadline);
} else {
const deadline = JSON.parse(localStorage.getItem('deadline'));
initializeClock('clockdiv', deadline);
}
请参阅代码段以获取完整代码,但请注意,此处无效,因为无法在SO上访问localStorage
。您需要复制并粘贴它并在浏览器中进行测试。
function getTimeRemaining(endtime) {
var t = Date.parse(endtime) - Date.parse(new Date());
var seconds = Math.floor((t / 1000) % 60);
var minutes = Math.floor((t / 1000 / 60) % 60);
var hours = Math.floor((t / (1000 * 60 * 60)) % 24);
var days = Math.floor(t / (1000 * 60 * 60 * 24));
return {
'total': t,
'days': days,
'hours': hours,
'minutes': minutes,
'seconds': seconds
};
}
function initializeClock(id, endtime) {
var clock = document.getElementById(id);
var daysSpan = clock.querySelector('.days');
var hoursSpan = clock.querySelector('.hours');
var minutesSpan = clock.querySelector('.minutes');
var secondsSpan = clock.querySelector('.seconds');
function updateClock() {
var t = getTimeRemaining(endtime);
daysSpan.innerHTML = t.days;
hoursSpan.innerHTML = ('0' + t.hours).slice(-2);
minutesSpan.innerHTML = ('0' + t.minutes).slice(-2);
secondsSpan.innerHTML = ('0' + t.seconds).slice(-2);
if (t.total <= 0) {
clearInterval(timeinterval);
}
}
updateClock();
var timeinterval = setInterval(updateClock, 1000);
}
if (!localStorage.getItem('deadline')) {
const deadline = new Date(Date.parse(new Date()) + 15 * 24 * 60 * 60 * 1000);
localStorage.setItem('deadline', JSON.stringify(deadline));
initializeClock('clockdiv', deadline);
} else {
const deadline = JSON.parse(localStorage.getItem('deadline'));
initializeClock('clockdiv', deadline);
}
#clockdiv {
color: #ffffff;
display: inline-block;
font-size: 14px;
font-weight: 100;
text-align: center;
}
#clockdiv > div {
background: #0294cb;
border-radius: 3px;
display: inline-block;
padding: 8px;
}
#clockdiv div > span {
background: #42baff;
border-radius: 3px;
display: inline-block;
padding: 15px;
}
.smalltext {
font-size: 14px;
padding-top: 5px;
}
<div id="clockdiv">
<div>
<span class="days"></span>
<div class="smalltext">Days</div>
</div>
<div>
<span class="hours"></span>
<div class="smalltext">Hours</div>
</div>
<div>
<span class="minutes"></span>
<div class="smalltext">Minutes</div>
</div>
<div>
<span class="seconds"></span>
<div class="smalltext">Seconds</div>
</div>
</div>