我想在网页上自动设置时间,所以我有带id属性的HTML代码:
<div id="demo">
</div>
和JS函数为用户腾出时间:
function tellTime() {
var now = new Date();
var theHr = now.getHours();
var theMin = now.getMinutes();
document.write("time: " + theHr + ":" + theMin);
}
document.getElementById("demo").innerHTML = tellTime();
因此,当页面重新加载时,似乎是时间,但用户muss重新加载页面以查看当前时间。
我们如何设置功能,无需重新加载以查看当前时间是什么?
感谢
答案 0 :(得分:0)
<!DOCTYPE html>
<html>
<body>
<p>A script on this page starts this clock:</p>
<p id="demo"></p>
<button onclick="clearInterval(myVar)">Stop time</button>
<script>
var myVar = setInterval(myTimer ,1000);
function myTimer() {
var d = new Date();
document.getElementById("demo").innerHTML = d.toLocaleTimeString();
}
</script>
</body>
</html>
http://www.w3schools.com/js/tryit.asp?filename=tryjs_setinterval3
答案 1 :(得分:0)
function tellTime()
{
var now = new Date(),
hrs = now.getHours(),
min = now.getMinutes(),
sec = now.getSeconds();
document.getElementById("demo").innerHTML = ("time: " + hrs + ":" + min + ':' + sec);
}
window.setInterval(tellTime, 1000);
答案 2 :(得分:0)
你可以使用setTimeout自动刷新它或者发一个事件(例如点击事件)来重新加载时间,使用setTimeout你可以像这样每秒刷新时间:
function tellTime() {
var now = new Date();
var theHr = now.getHours();
var theMin = now.getMinutes();
return "time: " + theHr + ":" + theMin;
}
function printTime() {
document.getElementById("demo").innerHTML = tellTime();
setTimeout(printTime, 1000); // Run this function again after a second
}
答案 3 :(得分:0)
您需要使用setInterval
。
function tellTime() {
var now = new Date();
var theHr = now.getHours();
var theMin = now.getMinutes();
var theSec = now.getSeconds();
return "time: " + theHr + ":" + theMin + ":" + theSec;
}
setInterval(function() {
document.getElementById("demo").innerHTML = tellTime();
}, 1000);
<div id="demo">
</div>