目前,我的代码中有这个JavaScript
function startTimer(duration, display) {
var timer = duration,
minutes, seconds;
setInterval(function() {
minutes = parseInt(timer / 60, 10);
seconds = parseInt(timer % 60, 10);
minutes = minutes < 10 ? "0" + minutes : minutes;
seconds = seconds < 10 ? "0" + seconds : seconds;
display.textContent = minutes + ":" + seconds;
if (--timer < 0) {
timer = 0;
}
}, 1000);
}
window.onload = function() {
var fiveMinutes = 60 * 0.18,
display = document.querySelector('#time');
startTimer(fiveMinutes, display); //`enter code here`
};
<div id="time"></div>
刷新时如何保持计时器运行?使用饼干是唯一的方法吗?
这只是关于如何制作cookie的指示,这是工作代码。在这里查看小提琴:https://jsfiddle.net/edencorbin/hht4yqka/1/您需要调整计时器,我将其设置为 10:00。
<script>
var minutes = 0;
var seconds = 0;
function startTimer(duration, display) {
var timer = duration,
minutes, seconds;
setInterval(function() {
minutes = parseInt(timer / 60, 10);
seconds = parseInt(timer % 60, 10);
minutes = minutes < 10 ? "0" + minutes : minutes;
seconds = seconds < 10 ? "0" + seconds : seconds;
display.textContent = minutes + ":" + seconds;
setCookie("minutes", minutes.toString(), 1);
setCookie("seconds", seconds.toString(), 1);
if (--timer < 0) {
timer = 0;
}
}, 1000);
}
window.onload = function() {
var minutes_data = getCookie("minutes");
var seconds_data = getCookie("seconds");
var timer_amount = (60*10); //default
if (!minutes_data || !seconds_data){
//no cookie found use default
}
else{
timer_amount = parseInt(minutes_data*60)+parseInt(seconds_data)
}
var fiveMinutes = timer_amount,
display = document.querySelector('#time');
startTimer(fiveMinutes, display); //`enter code here`
};
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays*24*60*60*1000));
var expires = "expires="+d.toUTCString();
document.cookie = cname + "=" + cvalue + "; " + expires;
}
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i=0; i<ca.length; i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1);
if (c.indexOf(name) == 0) return c.substring(name.length,c.length);
}
return "";
}
</script>
<div id="time"></div>
我认为如果你的服务器端没有数据库之类的东西和/或用户没有登录,cookie 是你最好的选择:
这可能有助于您入门,定义设置并获取每个cookie函数
设置
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays*24*60*60*1000));
var expires = "expires="+d.toUTCString();
document.cookie = cname + "=" + cvalue + "; " + expires;
}
获取
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i=0; i<ca.length; i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1);
if (c.indexOf(name) == 0) return c.substring(name.length,c.length);
}
return "";
}
在文档中的某个位置,也许在您的计时器中,将 cookie 设置为如下所示:
setCookie("minutes", minutes.toString(), 1);
setCookie("seconds", seconds.toString(), 1);
然后在加载事件中的某个地方通过 get 函数设置变量,如下所示:
minutes = getCookie("minutes");
seconds = getCookie("seconds");
在此处阅读更多内容 http://www.w3schools.com/js/js_cookies.asp