Is it possible to run code after all ajax call completed under the for loop statement?

Question

I have a for loop statement, each loop will execute an ajax call.

$.each(arr, function(i, v) {
    var url = '/xml.php?id=' + v;
    $.ajax({
        url: url,
        type: 'GET',
        dataType: 'xml',
        success: function(xml) {
            if ($(xml).find('Lists').attr('total') == 1) {
                // some code here
            }
        },
        complete: function() {
            // some code here
        }
    })
})

I want to run code after all ajax call completed under the loop, I have tried to place the code below to last line, it is not executed when the ajax call completed

    if (i == arr.length - 1) {
        // some code here
    }

Therefore, if I have 10 times of loop, there are 10 times of ajax call. I want to run a code after there 10 times of ajax call completed, any ideas?

Is it better to use .ajaxComplete() or .done() to achieve it?

Thanks

Answer 1

Try using $.when()

var arr = [];
$.each(arr, function(i, v) {
    var url = '/xml.php?id=' + v;
    var xhr = $.ajax({
        url: url,
        type: 'GET',
        dataType: 'xml',
        success: function(xml) {
            if ($(xml).find('Lists').attr('total') == 1) {
                // some code here
            }
        },
        complete: function() {
            // some code here
        }
    });
    arr.push(xhr);
})

$.when.apply($, arr).then(function(){
    console.log('do')
})