Question

我确信jQuery工作正常，但由于某种原因它不适合我。我甚至无法将它放入jsFiddle，因为它不喜欢Ajax，但我的$(this).children语句根本不起作用。我没有收到任何错误......我做错了什么？

JS

$('.submitNewOrder').submit( function() {
    $(this).children('input[type=\"submit\"]').prop('disabled',true); // Doesn't work
    $(this).children('.saving').fadeIn('fast');  // Doesn't work
    $.ajax({
        url: 'scripts/submitNewOrder.php?catID=1',
        data: newOrder,
        type: 'POST',
        mode: 'abort',
        success: function(){
            $(this).children('.saving').fadeOut('fast', function() { // Doesn't work
                $(this).children('.success').fadeIn('fast'); // Doesn't work
            });
        },
        error: function(){
            $(this).children('.error').fadeIn('fast'); // Doesn't work
        }
    });
    return false;
});

HTML

<form class="submitNewOrder">
    <p>
    <input type="submit" value="Save order" />
        <span class="saving" style="display:none">Saving changes...</span>
        <span class="success" style="display:none">Saved!</span>
        <span class="error" style="display:none">There was a problem saving :(</span>
    </p>
</form>

Answer 1

尝试将children替换为find，如：

$('.submitNewOrder').submit(function () {
    var $this = $(this);
    $this.find('input[type=\"submit\"]').prop('disabled', true); 
    $this.find('.saving').fadeIn('fast'); 
    $.ajax({
        url: 'scripts/submitNewOrder.php?catID=1',
        data: newOrder,
        type: 'POST',
        mode: 'abort',
        success: function () {
            $this.find('.saving').fadeOut('fast', function () { 
                $this.find('.success').fadeIn('fast'); 
            });
        },
        error: function () {
            $this.find('.error').fadeIn('fast'); 
        }
    });
    return false;
});

Answer 2

使用ajax的context选项并使用.find()代替.children()：

$.ajax({
        url: 'scripts/submitNewOrder.php?catID=1',
        data: newOrder,
        type: 'POST',
        mode: 'abort',
        context: this, //<< HERE so in callback functions, 'this' refers to the object, not options object of ajax call
        success: function(){
            $(this).find('.saving').fadeOut('fast', function() {
                $(this).find('.success').fadeIn('fast');
            });
        },
        error: function(){
            $(this).find('.error').fadeIn('fast');
        }
    });

Answer 3

在submit this指向form元素。您要查找的元素不是form的子元素，而是<p>的子元素。将您的表达式更改为$(this).find(...)，这将在树下搜索一个以上的级别。

jQuery $（this）.children不工作？

3 个答案: