如何防止window.onload自身重复
[英]How to prevent window.onload from repeating itself
问题描述
I am trying to execute a js action that automatically sends informations to the URL for future use with php. 
我正在尝试执行一个js操作，该操作会自动将信息发送到URL，以供将来与php一起使用。 To do so, I added a "onload" event on the window object and modified the URL in the listener. 为此，我在窗口对象上添加了“ onload”事件，并在侦听器中修改了URL。 This is what it looks like so far: 到目前为止是这样的：
window.addEventListener("load", function() {
window.location = "?test=test";
}, false);
When I load the page, the URL changes, but this is repeated over and over until the browser crashes. 当我加载页面时，URL会更改，但是会不断重复直到浏览器崩溃。 I was just wondering if there was a way to only execute it once. 我只是想知道是否有一种方法只能执行一次。
6 个解决方案
解决方案1
0 2013-12-30 19:21:42
重定向之前，请检查您是否已经在该页面上。
解决方案2
0 2013-12-30 19:23:32
在URL上添加一个简单的标志，如下所示： window.location = "?test=test&second=true";
解决方案3
0 2013-12-30 19:35:38
As suggested in How can I get query string values in JavaScript? 如我如何在JavaScript中获取查询字符串值中所建议的那样？
Write a function to check get the URL params in JS GetQueryStringParams() 编写函数以检查是否在JS中获取URL参数GetQueryStringParams（）
Then as suggested by others pass a send param in while reload 然后按照其他人的建议，在重载时传递发送参数
window.location = "?test=test&second=true"; window.location =“？test = test＆second = true”;
Use the function in JS to check if you have a URL query string second and if its not there then reload the page 使用JS中的函数检查是否有第二个URL查询字符串，如果没有，则重新加载页面
解决方案4
0 已采纳 2013-12-30 19:40:12
If you don't want to use AJAX, and don't want to write JS functions to parse query strings, why not a simple: 如果您不想使用AJAX，并且不想编写JS函数来解析查询字符串，那么为什么不那么简单：
<?php if(!isset($_GET['test'])): ?>
<script>
window.addEventListener("load", function() {
window.location = "?test=test";
}, false);
</script>
<?php else: ?>
<!--No JS written on the page, so no redirect -->
<?php endif;?>
But you really should look into AJAX, try using some JS framework like jQuery to help you in the process: http://api.jquery.com/jquery.ajax/ 但是您确实应该研究AJAX，尝试使用jQuery之类的JS框架在此过程中为您提供帮助： http : //api.jquery.com/jquery.ajax/
解决方案5
0 2014-08-15 18:18:03
if you want to pass variables do this: 如果要传递变量，请执行以下操作：
<?php
if(!isset($_GET['page'])){ //this line check if the variable field is available
$a = "Blank";
}else{
$a = $_GET['page'];
}
?>
that is it. 这就对了。
解决方案6
0 2015-05-02 14:16:12
You could just erase the onLoad method once it's run, like so: 您可以在onLoad方法运行后立即将其擦除，如下所示：
<script>
function doLoadStuff()
{
doSomeStuff();
//Clear onLoad contents
body.onLoad = function() {};
}
</script>
<body onLoad="doLoadStuff();">MyContent</body>
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