关于如何更好地提出问题的任何建议？
所以我有HTML和Javascript代码，它从用于Lab Analysis统计分析的程序数据库中获取数据。例如，你有一个电镀槽说铜，你需要找出浓度，你需要洗澡的pH值，然后将其插入程序，它会保存这些信息。在网页上，它可以直观地显示记录的内容，下次添加到期时间以及更改时间。
所以我想每隔三秒刷新一次页面，以显示倒计时到下一次测试到期为止，＆＃39;我已经用下面的代码完成了这个，但是有内存泄漏，当你可以看到我已经尝试了很多东西来试图清除记忆，但无论它构建什么直到页面冻结。任何人都可以看到内存泄漏的问题是什么？它发生在FF和IE 8+没有测试下面，在铬没有内存泄漏，但图像闪烁。
我先说，我知道这个问题太长了，所以我很抱歉，但我不知道如何以其他方式提出这个问题。我相信你们所有人都可以看到我对编写网页代码的理解有限，所以我也为此道歉。我只想了解内存构建和构建的原因。希望通过更改代码或删除或添加一些代码来修复它。
重新加载脚本。
function UnloadHandler() {
window.removeEventListener('unload', UnloadHandler, true);
}
window.addEventListener('unload', UnloadHandler, true);
jQuery(window).unload(function () { $(window).unbind('unload'); });
jQuery.ajaxSetup ({
cache: false
});
loc = window.location.pathname; // grabs page url. \\
pathName = loc.substring(49, loc.lastIndexOf('.') + 4); // parses out url except for htm file name. \\
var script = jQuery(document).ready(function() {
var test = setInterval(function(){ // Sets the data refresh cycle at 3 seconds. \\
jQuery.get(pathName, function (response) {
var source = $('<div>' + response + '</div>');
jQuery("#GroupData").empty();
(document.getElementById("GroupData")).innerHTML = "";
jQuery('#GroupData').html(source.find('#GroupData').load());
timing(); UnloadHandler();
eval(script);
});
},3*1000); // 3 equals seconds to refresh the data thriugh Ajax \\
});
HTML看起来像这样。
<div id="GroupInfo">
<table style="border:0px; border-style:solid; border-color:#FFFFFF; width:902px; height:20px; border-spacing:0px 1px;border-collapse:seperate; padding:0px; vertical-align:0;">
<tr>
<td style="background-color:#FFFFFF;color:000000;background-image: url(../Images/Blue-20x20-Button.png); background-size:30px 22px;width:26px; height:21px;"><div style="color:#000000; text-align:center; margin-bottom:-2px;font-weight:bold;"></div></td>
<td style="width:2px;"> </td>
<td style="background-color:#FFFFFF;color:000000;background-image: url(../Images/Blue-354x20-Button.png); background-size:365px 22px;width:336px; height:21px;"><div style="color:#000000; text-align:center; margin-bottom:-2px; font-weight:bold;">Process Tanks</div></td>
<!-- <td height='10' width='122' bgcolor="#0000FF" ><p align='center'><a><b>Sample</b></td>-->
<td style="width:14px;"> </td>
<td style="background-color:#FFFFFF;color:000000;background-image: url(../Images/Blue-122x20-ButtonTest.png); background-size:147px 22px;width:135px; height:21px;"><div style="color:#000000; text-align:center; margin-bottom:-2px; font-weight:bold;">Test Status</div></td>
<td style="width:15px;"> </td>
<td style="background-color:#FFFFFF;color:000000;background-image: url(../Images/Blue-122x20-ButtonTest.png); background-size:147px 22px;width:136px; height:21px;"><div style="color:#000000; text-align:center; margin-bottom:-2px; font-weight:bold;">Adds</div></td>
<td style="width:16px;"> </td>
<td style="background-color:#FFFFFF;color:000000;background-image: url(../Images/Blue-122x20-ButtonTest.png); background-size:148px 22px;width:134px; height:21px;"><div style="color:#000000; text-align:center; margin-bottom:-2px; font-weight:bold;">Corrective Action</div></td>
</tr>
</table>
</div>
<div id="GroupData" align="center">
<div id="DrawRows">
<table class="DrawRow">
<tr>
<td class="drawrows"></td>
</tr>
</table>
</div>
<SCRIPT type="text/javascript">[ItemsHTML]</script>
</div>
还有一件事你看到<SCRIPT type="text/javascript">[ItemsHTML]</script>我不确定这是如何运作的，我没有写过我只是负责改变它。 [ItemsHTML]以某种方式将数据从程序中拉出数据库并显示如下所示代替[ItemsHTML]，因此有一个带有此代码的源文件，它创建一个名为out文件的网页，并在out文件中而不是;
<SCRIPT type="text/javascript">[ItemsHTML]</script>
它变成了这个;
<SCRIPT type="text/javascript">DrawRow ("G54.HTM","0","00 Chem/Etch/Gain Calculations","","","","","","","","","42","42");
DrawRow ("G78.HTM","0","00 pH Indicators & Reagent Make-Up","","","","","","","Y","6/14/2014 10:21 AM","99","99");
DrawRow ("G55.HTM","6","01 Aurolectroless SMT 520 ENIG","6/9/2014 5:00 AM","6/9/2014 5:00 AM","6/15/2014 5:00 AM","6/15/2014 10:30 AM","","","Y","6/14/2014 7:59 AM","82","99");
DrawRow ("G56.HTM","127","02 Circuposit™ 3000-1 Process","6/6/2014 9:00 AM","6/6/2014 9:00 AM","6/13/2014 9:00 AM","6/14/2014 12:30 AM","","","Y","6/14/2014 1:56 AM","61","60");
DrawRow ("G57.HTM","36","03 Circubond™ 2200 Alternative Oxide","6/9/2014 5:00 AM","6/9/2014 5:00 AM","6/14/2014 5:00 AM","6/14/2014 11:01 AM","","","Y","6/15/2014 3:59 AM","12","9");
DrawRow ("G58.HTM","2","04 Cupulse™ Acid Copper","6/9/2014 6:00 AM","6/9/2014 6:00 AM","6/13/2014 6:00 AM","6/14/2014 9:25 PM","","","","","6","6");
DrawRow ("G59.HTM","0","05 Electroposit™ 1000 Acid Copper","","","","","","","","","16","16");
DrawRow ("G60.HTM","0","06 Electroposit™ 1100 Acid Copper","","","","","","","","","8","8");
DrawRow ("G61.HTM","36","07 EnviroStrip™ Tin Strippers","6/9/2014 5:00 AM","6/9/2014 5:00 AM","6/12/2014 11:00 AM","6/14/2014 9:30 PM","","","","","9","9");
这不是一个已发布的网站，它都是通过打开＆＃34; out＆＃34;文件并让它在显示器上运行，以便员工可以看到制造过程发生了什么。
计时功能显示页面的更新时间..显示上次更改的时间。它还显示当前时间
function timing(){ // Function for setting time formats for Current and Updated Time \\
var mydate=new Date()
var Time = "Current Time: ";
var Text = "Last Updated: ";
var build = Date.parse('[LastBuild]');
var build2 = dateFormat(build,"dddd m/dd/yy h:MM:ss TT"); // Format for updated time. \\
var build3 = Date.parse(mydate)
var build4 = dateFormat(build3, "dddd m/dd/yy h:MM:ss TT");
document.getElementById('time').innerHTML = Time+" "+ build4; // Sets the current time to chosen format. \\
document.getElementById('time2').innerHTML= Text + " " + build2; // Sets the updated time to format chosen for build2. \\
}
我也有这个时间来刷新页面。这几乎解决了问题，清除了大量已分配的内存，但它并没有释放所有内存。因此，如果您查看图形上的内存，它会上升一分钟，然后下降，但30分钟后内存不会一直下降，使用的内存增加了一倍。请参阅下面的刷新，没有滚动到顶部。
function refreshPage() { // Sets the page refresh to not scroll in IE \\
var page_y = document.documentElement.scrollTop;
var page_x = document.documentElement.scrollLeft;
window.location.href = window.location.href.split('?')[0] + '?page_y=' + page_y + "&page_x=" + page_x;
}
window.onload = function () {
timing();
UnloadHandler();
setTimeout(refreshPage, 1*60*1000); // Change fist number in equation, the first number represents minutes \\
var match = window.location.href.split('?')[1].split("&");
if (window.location.href.indexOf('page_y') != -1) {
document.documentElement.scrollTop = match[0].split("=")[1];
}
if (window.location.href.indexOf('page_x') != -1) {
document.documentElement.scrollLeft = match[1].split("=")[1];
}
}
答案 0 :(得分：0)
观看：http://www.w3schools.com/jsref/met_win_clearinterval.asp
我认为你的内存泄漏来自你不使用的clearInterval。每次使用带间隔的递归函数时，都必须清除预览调用（以避免内存泄漏）。
祝你好运
答案 1 :(得分：0)
我们将按步骤执行此操作：）
删除eval（脚本）; （不得使用eval，检查stackoverflow讨论：Why is using the JavaScript eval function a bad idea?）
相反，只需调用声明的函数即可。以下是您修改的代码：
var timer = '';
jQuery.ajaxSetup ({
cache: false
});
loc = window.location.pathname;// grabs page url. \\
pathName = loc.substring(49, loc.lastIndexOf('.') + 4); // parses out url except for htm file name. \\
function script(){
timer = setInterval(function(){// Sets the data refresh cycle at 3 seconds. \\
clearInterval(timer);
jQuery.get(pathName, function (response) {
var source = $('<div>' + response + '</div>');
jQuery("#GroupData").empty();
(document.getElementById("GroupData")).innerHTML = "";
jQuery('#GroupData').html(source.find('#GroupData').load());
timing();
$(window).unbind('unload');
script();
});
},3*1000); // 3 equals seconds to refresh the data thriugh Ajax \\
}
jQuery(document).ready(function() {
script();
});
修改后，“timing（）”函数有什么作用？你可以通过你的代码吗？也许该函数也会造成内存泄漏。