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edward18_1

help with this code

in Using jQuery • 11 years ago

Hi...I am from venezuela. so that my english is not so good...but here I go :D...

I got this code

$(document).ready(function() {
$("#todos_actualizar").load("response.php");
var refreshId = setInterval(function() {
$("#todos_actualizar").load('response.php?randval=<? echo rand();?>');
}, 10000);
$.ajaxSetup({ cache: false });
})

my problem is that this code refreshes the div #todos_actualizar every 10 seconds...and also when there is not changes....so I would like to change the data shown in the div #todos_actualizar, only when there´s some thing new to show.

I hope you to understand things I wrote....thanks for your help :D

Replies(4)

kerry.kim..

Re: help with this code

11 years ago

You'll have to look up sockets and long polling. I don't know much about either but node.js is a project that might be able to help you out. You might even want to consider flash for this.

charlietfl

Re: help with this code

11 years ago

another method would be to send the data in JSON and have server determine if update of page required

Example using "status=1" for "do update", "status=0" for no update

{"status": 1,"html":"<div>Html string of updates</div>"}

{"status": 0}

$.getJSON( url, function(data){
      if( data.status){
            $("#todos_actualizar").html( data.html);
      }

})

edward18_1

Re: Re: help with this code

11 years ago

oh! OK...I cant make it to work but..some one told me that I can use $.ajax() and into the function delegate for success (onreadystatechange) compare it with a "If "..the data response and refresh in case it to be diferent......so now...how can I implement what I said in my code....as you can see..I dont´n know too much bout Jquery...i'm going to begin a course but into one month.......thanks you at all :D

charlietfl

Re: help with this code

11 years ago

load() is a wrapper for $.ajax() as is $.getJSON()
http://api.jquery.com/category/ajax/

if you want to use the JSON method I suggested you would need to return JSON from server in similar way that I showed

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