倒计时器不会加载 - 仅在页面刷新后才会加载。
我已经在codepen.io等上测试了代码，但是当在网站上托管时，倒计时没有出现，它只在刷新后才会出现。
当我使用setInterval()时，它可以正常工作，但是我只想倒计时一次更新倒计时，因此使用了setTimeout()。
// Set the date we're counting down to
var countDownDate = new Date("Sep 5, 2018 15:37:25").getTime();
// Update the count down every 1 second
var x = setTimeout(function() {
// Get date
var now = new Date().getTime();
// Find the distance between now an the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
// Output the result in an element with id="demo"
document.getElementById("demo").innerHTML = days + " days left ";
// If the count down is over, write some text
if (distance < 0) {
clearTimeout(x);
document.getElementById("demo").innerHTML = "EXPIRED";
}
}, 300);
答案 0 :(得分：1)
您可以创建data-attribute，即：updateCountdown。这将是仅更新倒计时一次的标志。
// Set the date we're counting down to
var countDownDate = new Date("Sep 5, 2018 15:37:25").getTime();
// Update the count down every 1 second
var x = setInterval(function() {
// Get date
var now = new Date().getTime();
// Find the distance between now an the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var demo = document.getElementById("demo");
if (!demo.dataset.updateCountdown) {
console.log('Update countdown.');
demo.dataset.updateCountdown = false;
// Output the result in an element with id="demo"
demo.innerHTML = days + " days left ";
}
console.log(x)
// If the count down is over, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("demo").innerHTML = "EXPIRED";
}
}, 2000);<span id='demo'></span>
请参阅？现在它只更新了一次。