Question

i have a rails 3.1rc4 app and i would like to update a div in my index.html.erb file after every 10sec. I dont no if this can be done via jquery? there use to be a update method but i dont no if it is for only prototype. any sample would be great

Answer 1

Breaking down your question into sub-tasks, here’s what you have to deal with:

1. retrieve (HTTP GET) html
2. update a div with the retrieved html
3. Repeat steps 1 and 2 every 10 seconds

For 1, check out jquery’s .get

Description: Load data from the server using a HTTP GET request.

For 2, check out jquery’s .html

Get the HTML contents ... or set the HTML contents of every matched element.

For 3, check out the setInterval

Summary
Calls a function or executes a code snippet repeatedly, with a fixed time 
delay between each call to that function. Returns an intervalID.

Final solution,

HTML Code:

<div id="divToChange"></div>

Javascript code

  function update()
  { 
     $.get('/', function(data) 
     {
         $('#divToChange').html(data);
     });
  }
$(document).ready(function($){
  window.setInterval('update()', 10*1000);
});