I'm looking for a JavaScript solution (or whatever else) that will refresh a webpage ONLY once, after 5 seconds it has been opened. Is this possible without being stuck in a refresh loop?
5 Answers
try this:
setTimeout(function ()
{
if (self.name != '_refreshed_'){
self.name = '_refreshed_';
self.location.reload(true);
} else {
self.name = '';
}
}, 5000);

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You could do this in many different ways, but I think the easiest would be to add a query string to the url after the refresh, allowing us to tell if the refresh has already occurred:
//Function to get query string value. Source: http://www.bloggingdeveloper.com/post/JavaScript-QueryString-ParseGet-QueryString-with-Client-Side-JavaScript.aspx
function getQuerystring(key, default_){
if (default_==null) default_="";
key = key.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
var regex = new RegExp("[\\?&]"+key+"=([^&#]*)");
var qs = regex.exec(window.location.href);
if(qs == null)
return default_;
else
return qs[1];
}
//check if our query string is already set:
if(getQuerystring(r) !== 1){
setTimeout(function(){window.location.href = window.location.href + '?r=1'},5000)
}
If there is the possibility that a query string is already present, you will have to account for that and change the '?' to an '&'.

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You just need to pass some sort of data between page loads. This can be done in a multitude of ways — use a cookie, a URL query parameter, or something on the server side. Query parameter example:
if (!location.search.match(/(\?|&|^)stopRefreshing(=|&|$)/))
{
setTimeout(function ()
{
var search = location.search;
location.search = search ? search + '&stopRefreshing' : 'stopRefreshing';
}, 5000);
}
Demo: http://jsbin.com/ofawuz/edit

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Sure, if you don't mind using jquery you can do it via an ajax call after waiting 5 seconds. Just throwing you some sample code:
How to wait 5 seconds with jQuery?
$(document).ready(function() {
// Get data
$.ajax({
url : '/tommyStockExchange/Data',
dataType : 'html',
data : {
'format' : 'H',
'type' : 'E'
},
success : function(data) {
$("#executions").html(data);
},
statusCode : {
404 : function() {
alert('executions url 404 :(');
}
}
});
});

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This neither refreshes the page, nor has anything to do with avoiding a refresh loop. -1 – Matt Ball Nov 21 '11 at 18:30
Make it redirect to the same page with a different #hash and in JS only register the redirect if the hash isn't set.

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