I've seen some coworkers use this in rails
$('[data-once=true]').live('ajax:before', function(request, e) {
});
However I'm trying to use it with jquery and it doesnt work, does this event comes with the rails jquery adapter?
This 'ajax:before' isn't a useful event for .live() to handle, unless you've defined a custom event with that name.
I'm not a rails dev, so I'm not sure how rails changes this equation, but this is how I'd attach an function to the AJAX before in plain ole' JS:
$.ajax({
beforeSend: function(){
alert("Before");
},
complete: function(){
alert("after");
}
});
Note that these events are fired for all AJAX requests thereafter. You're essentially subscribing to the AJAX object.
See the jQuery AJAX Events Documentation for more info.
Yes, ajax:before is a jQuery event that rails adds/triggers, though in the latest version it's not ajax:beforeSend. In jQuery though (ajax:before was around before the JS framework agnostic changes to rails), you can just attach to this globally, using the ajaxSend global event, like this:
$(document).bind('ajaxSend', function(e, request, options) {
$('[data-once=true]').something();
});