如何在发送之前清空ajax数据?

时间:2018-05-24 10:34:05

标签: javascript ajax

我有一个表单,当我提交它时会创建一个ajax函数,然后在成功中从数据中创建一个表。但是知道我的页面是动态的(没有重新加载页面我多次调用ajax函数),但每次成功中的数据在生成更多数据之前都不会被删除。这是正常的吗?如何在发送ajax之前清空成功数据变量?

功能:

function submitForm() {

        if ($.fn.DataTable.isDataTable("#table")) {
            $('#table').DataTable().clear();
            $('#table').DataTable().destroy();
            $('#table').empty();
        }

        url = $("#form").serialize();
        console.log(url);
        $(document).ready(function() {
            $.ajax({
                type: "GET",
                dataType: "json",
                url: '/api/test?'+url,
                'beforeSend': function (request) {
                    data = {}; // like this maybe?
                },
                success: function (data) {
                    //Getting data variable containing
                    data = data.data;
                    //the second time I call the function, data contains the new and old stuff at the same time
                }
        });
}

表格:

<form method="GET" action="" class="form-horizontal" id="form" onsubmit="return false;">

    <button type="submit" onclick="submitForm();">Update table</button>

</form>

表:

<table class="table table-striped display nowrap col-md-12" id="achats_table">
    <thead>
        <tr style="border-bottom:2px dashed #ccc"></tr>
    </thead>

    <tbody></tbody>

    <tfoot align="right">
        <tr></tr>
    </tfoot>
</table>

1 个答案:

答案 0 :(得分:0)

您必须在beforeSend中清空表格,

function submitForm() {
        url = $("#form").serialize();
        console.log(url);
        $(document).ready(function() {
            $.ajax({
                type: "GET",
                dataType: "json",
                url: '/api/test?'+url,
                'beforeSend': function (request) {
                    if ($.fn.DataTable.isDataTable("#achats_table")) {
                       $('#table').DataTable().clear();
                       $('#table').DataTable().destroy();
                       $('#table').empty();
                    }
                },
                success: function (data) {
                    //Getting data variable containing
                    data = data.data;
                    //the second time I call the function, data contains the new and old stuff at the same time
                }
        });
}