Simulating Delay using jQuery and setTimeout()
Sometimes you may wish to simulate a delay of events such as simulating loading of results before showing on the page. This example uses a recursive setTimeout() to call a function which loops through an array of data which has the results of a system precheck to check for things such as JavaScript, Flash, Browser Version etc… When I get time I might code this into a jQuery plugin which will be easy just need to determine which options to provide to cater for different usage.
jQuery Code Recursive setTimeout()
//data and settings
var result = ‘
Precheck passed.
‘, //html for main result
delay = 500, //delay of sub results
data = Array(
‘
‘,
‘
‘,
‘
‘,
‘
‘,
‘
‘
);
//self executing function starting from array index 0
(function process_els(el_index) {
var el = data[el_index],
precheckUl = $(‘#precheck ul’),
loadingLi = $(‘
‘),
sysPreId = “syspre_”+el_index;
//show loading image
precheckUl.append(loadingLi.clone().attr(“id”,sysPreId));
//after simulated delay replace loading image with sub check result
setTimeout( function()
{
precheckUl.find(‘li.loading:first’).replaceWith(data[el_index]);
}, delay);
//to simulate the delay recursively call itself until all array elements have been processed
if (el_index + 1 HTML
System Check
