Javascript 解除绑定单击事件后jQuery开/关方法不工作

我创建了一个处理大量数据的ajax函数，因此当单击按钮时，可能需要一段时间才能得到响应。现在，当人们在网站上时，他们不停地点击，这就给我的数据库留下了重复的数据。我在谷歌上找到了jQuery的

on

和

off

事件，用于绑定和解除绑定单击事件。当函数被激发时，unbind事件起作用，但是当响应无效时，我想再次绑定click事件，而这在我的情况下不起作用

警报get已触发，因此它将到达on函数

有人能看看我的功能，看看我做错了什么吗

    $('#afrekenen').click(function(){
        $('#afrekenen').off("click");
        clearInterval(myInterval);
        var fields = $('.addressform :input');
        $.each(fields, function(field,val){
            $(val).removeClass('errorInput');
        })
        var gegevens = {};
        var adresform = $('.addressform').serializeArray();
        $.each(adresform, function(index, val){
            gegevens[this.name] = this.value;
        });
        if(!$('input[name=payment]:checked').val()){
            var betaalwijze = 0;
        }else{
            var betaalwijze = $('input[name=payment]:checked').val();
        }

        var voorwaarden = $('input[name=voorwaarden]:checked').val();

        $.ajax({
            type: 'post',
            url: '/inc/afrekenen.php',
            data: {"gegevens":gegevens ,"betaalwijze":betaalwijze,"voorwaarden":voorwaarden},
            fail: function() { 
                $('#afrekenen').on("click"); 
                $('#errormsg').html('<div class="alert alert-danger">'+
                    '<button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>Oops something went wrong. please try again</div>');
            },
            success: function(data) {
                response = jQuery.parseJSON(data)
                if(response.isValid == false){
                    alert('hoi');
                    $('#afrekenen').on("click");
                    $('#errormsg').html('<div class="alert alert-danger">'+
                    '<button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>'
                    +response.message+'</div>');

                    $.each(response.fouteVelden, function(index, object){
                        $('#'+object+'').addClass('errorInput');
                    });
                }else{

                    if(/^([a-z]([a-z]|\d|\+|-|\.)*):(\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?((\[(|(v[\da-f]{1,}\.(([a-z]|\d|-|\.|_|~)|[!\$&'\(\)\*\+,;=]|:)+))\])|((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=])*)(:\d*)?)(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*|(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)|((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)|((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)){0})(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i.test(response.message)) {
                                window.location.href = response.message;
                    } else {
                        window.location.href = 'winkelwagen.php?step=afgerond';
                    }
                }
            }
        });

$（'afrekenen'）。单击（函数（）{
$（'afrekenen'）。关闭（“单击”）；
clearInterval（myInterval）；
变量字段=$（'.addressform:input'）；
$.each（字段，函数）（字段，val）{
$（val）.removeClass（'errorInput'）；
})
var gegevens={}；
变量adresform=$（'.addressform'）.serializeArray（）；
$.each（地址形式、函数（索引、val）{
gegevens[this.name]=this.value；
});
如果（！$（'input[name=payment]：选中'）.val（））{
var betaalwijze=0；
}否则{
var betaalwijze=$（'input[name=payment]：checked'）.val（）；
}
var voorwaarden=$（'input[name=voorwaarden]：checked'）.val（）；
$.ajax({
键入：“post”，
url:“/inc/afrekenen.php”，
数据：{“gegevens”：gegevens，“Betaalwizze”：Betaalwizze，“voorwaarden”：voorwaarden}，
失败：函数（）{
$（#afrekenen'）。点击；
$（'#errormsg'）.html（''+
“×；Oops出现问题。请重试”）；
},
成功：功能（数据）{
response=jQuery.parseJSON（数据）
if（response.isValid==false）{
警报（“hoi”）；
$（#afrekenen'）。点击；
$（'#errormsg'）.html（''+
“×；”
+响应。消息+“”）；
$.each（response.fouteVelden，函数（索引，对象）{
$（'#'+object+''）.addClass（'errorInput'）；
});
}否则{
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window.location.href=response.message；
}否则{
window.location.href='winkelwagen.php？step=afgerond'；
}
}
}
});

我认为你应该把事情分开，这样更容易些

此外，您还可以创建一个命名函数作为click事件处理程序回调，并相应地绑定/解除绑定

$(function () {
    // This will toggle the click event handler on/off.
    function toggleClickHandler(toggle) {
        if (toggle === true) {
            $('#afrekenen').on('click', processMyRequest);
        } else {
            $('#afrekenen').off('click', processMyRequest);
        }
    }

    // This will process your request (AJAX call).
    var processMyRequest = function() {
        toggleClickHandler(false);
        clearInterval(myInterval);

        var fields = $('.addressform :input');

        $.each(fields, function (field, val) {
            $(val).removeClass('errorInput');
        });

        var gegevens = {};
        var adresform = $('.addressform').serializeArray();

        $.each(adresform, function (index, val) {
            gegevens[this.name] = this.value;
        });

        // Unrelated to the question:
        // Note that before you had the variable "betaalwijze" declared
        // twice using var. This is wrong, so I've fixed it.
        var betaalwijze;

        if (!$('input[name=payment]:checked').val()) {
            betaalwijze = 0;
        } else {
            betaalwijze = $('input[name=payment]:checked').val();
        }

        var voorwaarden = $('input[name=voorwaarden]:checked').val();

        $.ajax({
            type: 'post',
            url: '/inc/afrekenen.php',
            data: {
                "gegevens": gegevens,
                    "betaalwijze": betaalwijze,
                    "voorwaarden": voorwaarden
            },
            success: function (data) {
                response = jQuery.parseJSON(data);

                if (response.isValid === false) {
                    alert('hoi');
                    toggleClickHandler(true);

                    $('#errormsg').html('<div class="alert alert-danger">' +
                        '<button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>' + response.message + '</div>');

                    $.each(response.fouteVelden, function (index, object) {
                        $('#' + object + '').addClass('errorInput');
                    });
                } else {
                    if (/^([a-z]([a-z]|\d|\+|-|\.)*):(\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?((\[(|(v[\da-f]{1,}\.(([a-z]|\d|-|\.|_|~)|[!\$&'\(\)\*\+,;=]|:)+))\])|((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=])*)(:\d*)?)(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*|(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)|((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)|((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)){0})(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i.test(response.message)) {
                        window.location.href = response.message;
                    } else {
                        window.location.href = 'winkelwagen.php?step=afgerond';
                    }
                }
            }
        }).fail(function () {
            // AJAX call has failed.
            toggleClickHandler(true);
        });
    };

    // When the document is loaded, attach the click event handler
    // by default.
    toggleClickHandler(true);
});

$（函数（）{
//这将打开/关闭单击事件处理程序。
函数切换ClickHandler（切换）{
如果（切换===真）{
$（'afrekenen'）。on（'click'，processMyRequest）；
}否则{
$（'afrekenen'）.off（'click'，processMyRequest）；
}
}
//这将处理您的请求（AJAX调用）。
var processMyRequest=函数（）{
切换ClickHandler（false）；
clearInterval（myInterval）；
变量字段=$（'.addressform:input'）；
$.each（字段，函数）（字段，val）{
$（val）.removeClass（'errorInput'）；
});
var gegevens={}；
变量adresform=$（'.addressform'）.serializeArray（）；
$.each（地址形式、函数（索引、val）{
gegevens[this.name]=this.value；
});
//与问题无关：
//注意，在声明变量“betaalwijze”之前
//两次使用var。这是错误的，所以我已经修复了它。
var betaalwijze；
如果（！$（'input[name=payment]：选中'）.val（））{
betaalwijze=0；
}否则{
betaalwijze=$（'input[name=payment]：checked'）.val（）；
}
var voorwaarden=$（'input[name=voorwaarden]：checked'）.val（）；
$.ajax({
键入：“post”，
url:“/inc/afrekenen.php”，
数据：{
“gegevens”：gegevens，
“Betaalwizze”：Betaalwizze，
“沃沃沃登”：沃沃沃登
},
成功：功能（数据）{
response=jQuery.parseJSON（数据）；
if（response.isValid==false）{
警报（“hoi”）；
切换ClickHandler（true）；
$（'#errormsg'）.html（''+
“×；”+response.message+”；
$('#afrekenen').click(function(){
    myAjaxFunctionality();        
});

function myAjaxFunctionality()
{
 $('#afrekenen').off("click");
clearInterval(myInterval);
    var fields = $('.addressform :input');
    $.each(fields, function(field,val){
        $(val).removeClass('errorInput');
    })
    var gegevens = {};
    var adresform = $('.addressform').serializeArray();
    $.each(adresform, function(index, val){
        gegevens[this.name] = this.value;
    });
    if(!$('input[name=payment]:checked').val()){
        var betaalwijze = 0;
    }else{
        var betaalwijze = $('input[name=payment]:checked').val();
    }

    var voorwaarden = $('input[name=voorwaarden]:checked').val();

    $.ajax({
        type: 'post',
        url: '/inc/afrekenen.php',
        data: {"gegevens":gegevens ,"betaalwijze":betaalwijze,"voorwaarden":voorwaarden},
        success: function(data) {
            response = jQuery.parseJSON(data)
            if(response.isValid == false){
                alert('hoi');
                $('#afrekenen').on("click", function(){myAjaxFunctionality();});
                $('#errormsg').html('<div class="alert alert-danger">'+
                '<button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>'
                +response.message+'</div>');

                $.each(response.fouteVelden, function(index, object){
                    $('#'+object+'').addClass('errorInput');
                });
            }else{

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