PHP jQuery trigger button on dom change - php

Question

I have this scenario:
I have a simple php file with only few html elemnts: a div called switch, another called lamp and a couple of buttons.
The two buttons are labeled On and Off.
The lamp div is empty.
The switch div is empty too, but is updated using jQuery and Ajax with the content of a txt file, that only contains one word: it could be On or Off.
What i'm traying to achieve is this: whenever the file is updated with the word On or Off i would like the On or Off button to be triggered correspondingly and the lamp div to change the background color. Is it possible?
UPDATE:
Example:
(function($){
$(document).ready(function() {
$.ajax({
url : "testfile.txt",
dataType: "text",
success : function (data) {
$("#switch").html(data);
// this doesn't seems to work...
var word = data.toLowerCase();
$('#' + word).trigger('click');
// this works
$(document).ajaxStop(function(e){
var response = $("#switch").html();
$("#" + response.toLowerCase()).trigger("click");
});
var $container = $("#switch");
var refreshId = setInterval(function()
{
$container.load('testfile.txt').html();
}, 2000);
}
});
});
})(jQuery);
<div id="switch"></div>
<div id="on" class="button">On</div>
<div id="off" class="button">Off</div>
<div id="lamp"></div>

Answer 1

Since the response is only one word. Why not try
var word = data.toLowerCase();
$('#' + word).trigger('click');
in the success callback.

Answer 2

If you have only one ajax request, you can do like this:
$(document).ajaxStop(function(e){
var response = $("#switch").text();
// do what you want with variable response here
$("#" + response.toLowerCase()).trigger("click");
});

Answer 3

Maybe this can help for what you need:
(function($){
$(document).ready(function() {
var $container = $("#switch");
$container.load("testfile.txt", function() {
setInterval(function() {
$container.load("testfile.txt");
}, 2000);
});
});
})(jQuery);
Use clearInterval() to stop the timer when needed.