在给定的闲置时间后如何自动重新加载页面

2020/11/11 14:42 · javascript ·  · 0评论

如果在给定的时间段内没有任何活动,如何自动重新加载网页?

如果要在没有活动的情况下刷新页面,则需要弄清楚如何定义活动。假设我们每分钟刷新一次页面,除非有人按下键或移动鼠标。这使用jQuery进行事件绑定:

<script>
     var time = new Date().getTime();
     $(document.body).bind("mousemove keypress", function(e) {
         time = new Date().getTime();
     });

     function refresh() {
         if(new Date().getTime() - time >= 60000) 
             window.location.reload(true);
         else 
             setTimeout(refresh, 10000);
     }

     setTimeout(refresh, 10000);
</script>

无需JavaScript,可以使用以下元标记来完成此操作:

<meta http-equiv="refresh" content="5" >

其中content =“ 5”是页面将等待刷新的秒数。

但是您只说如果没有活动,那将是什么样的活动?

我已经建立了一个完整的javascript解决方案,并且不需要jquery。可能可以将其变成插件。我将其用于流畅的自动刷新,但看起来它可以为您提供帮助。

JSFiddle自动刷新

// Refresh Rate is how often you want to refresh the page 
// bassed off the user inactivity. 
var refresh_rate = 200; //<-- In seconds, change to your needs
var last_user_action = 0;
var has_focus = false;
var lost_focus_count = 0;
// If the user loses focus on the browser to many times 
// we want to refresh anyway even if they are typing. 
// This is so we don't get the browser locked into 
// a state where the refresh never happens.    
var focus_margin = 10; 

// Reset the Timer on users last action
function reset() {
    last_user_action = 0;
    console.log("Reset");
}

function windowHasFocus() {
    has_focus = true;
}

function windowLostFocus() {
    has_focus = false;
    lost_focus_count++;
    console.log(lost_focus_count + " <~ Lost Focus");
}

// Count Down that executes ever second
setInterval(function () {
    last_user_action++;
    refreshCheck();
}, 1000);

// The code that checks if the window needs to reload
function refreshCheck() {
    var focus = window.onfocus;
    if ((last_user_action >= refresh_rate && !has_focus && document.readyState == "complete") || lost_focus_count > focus_margin) {
        window.location.reload(); // If this is called no reset is needed
        reset(); // We want to reset just to make sure the location reload is not called.
    }

}
window.addEventListener("focus", windowHasFocus, false);
window.addEventListener("blur", windowLostFocus, false);
window.addEventListener("click", reset, false);
window.addEventListener("mousemove", reset, false);
window.addEventListener("keypress", reset, false);
window.addEventListener("scroll", reset, false);
document.addEventListener("touchMove", reset, false);
document.addEventListener("touchEnd", reset, false);
<script type="text/javascript">
  var timeout = setTimeout("location.reload(true);",600000);
  function resetTimeout() {
    clearTimeout(timeout);
    timeout = setTimeout("location.reload(true);",600000);
  }
</script>

除非调用resetTimeout(),否则上面的代码每10分钟刷新一次页面。例如:

<a href="javascript:;" onclick="resetTimeout();">clicky</a>

基于arturnt的公认答案。这是一个经过稍微优化的版本,但实际上具有相同的功能:

var time = new Date().getTime();
$(document.body).bind("mousemove keypress", function () {
    time = new Date().getTime();
});

setInterval(function() {
    if (new Date().getTime() - time >= 60000) {
        window.location.reload(true);
    }
}, 1000);

唯一的区别是此版本使用setInterval代替setTimeout,这使代码更加紧凑。

var bd = document.getElementsByTagName('body')[0];
var time = new Date().getTime();

bd.onmousemove = goLoad;
function goLoad() {
if(new Date().getTime() - time >= 1200000) {
    time = new Date().getTime();
    window.location.reload(true);
    }else{
        time = new Date().getTime();
    }
}

每次移动鼠标都会检查上一次移动鼠标的时间。如果时间间隔大于20分钟,它将重新加载页面,否则它将更新您上一次移动鼠标的时间。

自动加载您选择的目标。在这种情况下,将目标_self设置为其自身,但是您可以通过将window.open('self.location', '_self');代码更改为类似此示例的方式来更改重新加载页面window.top.location="window.open('http://www.YourPageAdress.com', '_self'";

带有一条确认警报消息:

<script language="JavaScript">
function set_interval() {
  //the interval 'timer' is set as soon as the page loads  
  var timeoutMins = 1000 * 1 * 15; // 15 seconds
  var timeout1Mins = 1000 * 1 * 13; // 13 seconds
  itimer=setInterval("auto_logout()",timeoutMins);
  atimer=setInterval("alert_idle()",timeout1Mins);

}

function reset_interval() {
  var timeoutMins = 1000 * 1 * 15; // 15 seconds 
  var timeout1Mins = 1000 * 1 * 13; // 13 seconds
  //resets the timer. The timer is reset on each of the below events:
  // 1. mousemove   2. mouseclick   3. key press 4. scrolling
  //first step: clear the existing timer
  clearInterval(itimer);
  clearInterval(atimer);
  //second step: implement the timer again
  itimer=setInterval("auto_logout()",timeoutMins);
  atimer=setInterval("alert_idle()",timeout1Mins);
}

function alert_idle() {
    var answer = confirm("Session About To Timeout\n\n       You will be automatically logged out.\n       Confirm to remain logged in.")
    if (answer){

        reset_interval();
    }
    else{
        auto_logout();
    }
}

function auto_logout() {
  //this function will redirect the user to the logout script
  window.open('self.location', '_self');
}
</script>

没有确认警报:

<script language="JavaScript">
function set_interval() {
  //the interval 'timer' is set as soon as the page loads  
  var timeoutMins = 1000 * 1 * 15; // 15 seconds
  var timeout1Mins = 1000 * 1 * 13; // 13 seconds
  itimer=setInterval("auto_logout()",timeoutMins);

}

function reset_interval() {
  var timeoutMins = 1000 * 1 * 15; // 15 seconds 
  var timeout1Mins = 1000 * 1 * 13; // 13 seconds
  //resets the timer. The timer is reset on each of the below events:
  // 1. mousemove   2. mouseclick   3. key press 4. scrolling
  //first step: clear the existing timer
  clearInterval(itimer);
  clearInterval(atimer);
  //second step: implement the timer again
  itimer=setInterval("auto_logout()",timeoutMins);
}


function auto_logout() {
  //this function will redirect the user to the logout script
  window.open('self.location', '_self');
}
</script>

两种解决方案的主体代码相同:

<body onLoad="set_interval(); document.form1.exp_dat.focus();" onKeyPress="reset_interval();" onmousemove="reset_interval();" onclick="reset_interval();" onscroll="reset_interval();">

使用JavaScriptsetInterval方法:

setInterval(function(){ location.reload(); }, 3000);

是的,亲爱的,那么您必须使用Ajax技术。更改特定html标签的内容:

 <html>
    <head>
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
        <title>Ajax Page</title>
        <script>
        setInterval(function () { autoloadpage(); }, 30000); // it will call the function autoload() after each 30 seconds. 
        function autoloadpage() {
            $.ajax({
                url: "URL of the destination page",
                type: "POST",
                success: function(data) {
                    $("div#wrapper").html(data); // here the wrapper is main div
                }
            });
        }
        </script>
    </head>
    <body>
    <div id="wrapper">
    contents will be changed automatically. 
    </div>
 </body>
 </html>

我会考虑activity是否用户专注于窗口。例如,当您从一个窗口单击到另一个窗口(例如,从Internet浏览器中的Google Chrome浏览器到iTunes,或从选项卡1到选项卡2)时,网页可以发送一个回调,说“我不在焦点!”。或“聚焦”!可以使用jQuery来解决这种可能缺乏活动的情况,以完成他们想要的任何事情。如果我在你的位置,我将使用以下代码每5秒检查一次焦点,以此类推,如果没有焦点,则重新加载。

var window_focus;
$(window).focus(function() {
    window_focus = true;
}).blur(function() {
    window_focus = false;
});
function checkReload(){
    if(!window_focus){
        location.reload();  // if not focused, reload
    }
}
setInterval(checkReload, 5000);  // check if not focused, every 5 seconds

最后是最简单的解决方案:

带有警报确认:

<script type="text/javascript">
    // Set timeout variables.
    var timoutWarning = 3000; // Display warning in 1Mins.
    var timoutNow = 4000; // Timeout in 2 mins.

    var warningTimer;
    var timeoutTimer;

    // Start timers.
    function StartTimers() {
        warningTimer = setTimeout("IdleWarning()", timoutWarning);
        timeoutTimer = setTimeout("IdleTimeout()", timoutNow);
    }

    // Reset timers.
    function ResetTimers() {
        clearTimeout(warningTimer);
        clearTimeout(timeoutTimer);
        StartTimers();
        $("#timeout").dialog('close');
    }

    // Show idle timeout warning dialog.
    function IdleWarning() {
        var answer = confirm("Session About To Timeout\n\n       You will be automatically logged out.\n       Confirm to remain logged in.")
            if (answer){

                ResetTimers();
            }
            else{
                IdleTimeout();
            }
    }       

    // Logout the user and auto reload or use this window.open('http://www.YourPageAdress.com', '_self'); to auto load a page.
    function IdleTimeout() {
        window.open(self.location,'_top');
    }
</script>

没有警报确认:

<script type="text/javascript">
    // Set timeout variables.
    var timoutWarning = 3000; // Display warning in 1Mins.
    var timoutNow = 4000; // Timeout in 2 mins.

    var warningTimer;
    var timeoutTimer;

    // Start timers.
    function StartTimers() {
        warningTimer = setTimeout(timoutWarning);
        timeoutTimer = setTimeout("IdleTimeout()", timoutNow);
    }

    // Reset timers.
    function ResetTimers() {
        clearTimeout(warningTimer);
        clearTimeout(timeoutTimer);
        StartTimers();
        $("#timeout").dialog('close');
    }

    // Logout the user and auto reload or use this window.open('http://www.YourPageAdress.com', '_self'); to auto load a page.
    function IdleTimeout() {
        window.open(self.location,'_top');
    }
</script>

两种方法的主体代码相同

<body onload="StartTimers();" onmousemove="ResetTimers();" onKeyPress="ResetTimers();">

使用页面确认文本而不是警报

由于这是另一种在不活动时自动加载的方法,因此我给出了第二个答案。这个更简单,更容易理解。

在页面上有重新加载确认

<script language="javaScript" type="text/javascript">
<!--
var autoCloseTimer;
var timeoutObject;
var timePeriod = 5100; // 5,1 seconds
var warnPeriod = 5000; // 5 seconds
// Warning period should always be a bit shorter then time period

function promptForClose() {
autoCloseDiv.style.display = 'block';
autoCloseTimer = setTimeout("definitelyClose()", warnPeriod);
}


function autoClose() {
autoCloseDiv.style.display = 'block'; //shows message on page
autoCloseTimer = setTimeout("definitelyClose()", timePeriod); //starts countdown to closure
}

function cancelClose() {
clearTimeout(autoCloseTimer); //stops auto-close timer
autoCloseDiv.style.display = 'none'; //hides message
}

function resetTimeout() {
clearTimeout(timeoutObject); //stops timer
timeoutObject = setTimeout("promptForClose()", timePeriod); //restarts timer from 0
}


function definitelyClose() {

// If you use want targeted reload: parent.Iframe0.location.href = "https://URLHERE.com/"
// or  this: window.open('http://www.YourPageAdress.com', '_self');

// of for the same page reload use: window.top.location=self.location;
// or window.open(self.location;, '_self');

window.top.location=self.location;
}
-->
</script>

与页上确认一起使用时的确认框

<div class="leftcolNon">
<div id='autoCloseDiv' style="display:none">
<center>
<b>Inactivity warning!</b><br />
This page will Reloads automatically unless you hit 'Cancel.'</p>
<input type='button' value='Load' onclick='definitelyClose();' />
<input type='button' value='Cancel' onclick='cancelClose();' />
</center>
</div>
</div>

两者的机构代码相同

<body onmousedown="resetTimeout();" onmouseup="resetTimeout();" onmousemove="resetTimeout();" onkeydown="resetTimeout();" onload="timeoutObject=setTimeout('promptForClose()',timePeriod);">

注意:如果您不想在页面上进行确认,请使用“不进行确认”

<script language="javaScript" type="text/javascript">
<!--
var autoCloseTimer;
var timeoutObject;
var timePeriod = 5000; // 5 seconds

function resetTimeout() {
clearTimeout(timeoutObject); //stops timer
timeoutObject = setTimeout("definitelyClose()", timePeriod); //restarts timer from 0
}

function definitelyClose() {

// If you use want targeted reload: parent.Iframe0.location.href = "https://URLHERE.com/"
// or  this: window.open('http://www.YourPageAdress.com', '_self');

// of for the same page reload use: window.top.location=self.location;
// or window.open(self.location;, '_self');

window.top.location=self.location;
}
-->
</script>

使用LocalStorage跟踪上一次活动的时间,我们可以编写如下的reload函数

function reloadPage(expiryDurationMins) {
    const lastInteraction = window.localStorage.getItem('lastinteraction')
    if (!lastInteraction) return // no interaction recorded since page load
    const inactiveDurationMins = (Date.now() - Number(lastInteraction)) / 60000
    const pageExpired = inactiveDurationMins >= expiryDurationMins
    if (pageExpired) window.location.reload()
}

然后,我们创建一个箭头函数,以毫秒为单位保存上一次交互的时间(字符串)

const saveLastInteraction = () => window.localStorage.setItem('last', Date.now().toString())

我们将需要beforeunload在浏览器中监听事件以清除lastinteraction记录,这样我们就不会陷入无限的重载循环中。

window.addEventListener('beforeunload', () => window.localStorage.removeItem('lastinteraction'))

我们将需要监视的用户活动事件为mousemovekeypress当用户移动鼠标或按下键盘上的键时,我们存储最后一次交互时间

window.addEventListener('mousemove', saveLastInteraction)
window.addEventListener('keypress', saveLastInteraction)

要设置最终的侦听器,我们将使用该load事件。在页面加载时,我们使用该setInterval功能检查页面是否在一定时间后过期。

const expiryDurationMins = 1

window.addEventListener('load', setInterval.bind(null, reloadPage.bind(null, expiryDurationMins), 1000))

html标题部分中的以下代码非常容易使用此任务

<head> <meta http-equiv="refresh" content="30" /> </head>

30秒后,它将刷新您的页面。

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