我正在建立一个表格。其中有一个包含9个选项的选择器，它们彼此相似但不同。
我在select中的每次更改后调用calcTotal()函数。 calcTotal有一个包含9个案例的switch语句。我想我没有正确地调用calcTotal函数。因为在我选择一个选项后，adultTotal和childTotal没有按照分配进行更新，而是将其值显示为“未定义”。
每次选择后如何调用函数？ （在这种情况下我有4个，“typeSel”，“c1bed”，“c2bed”，“c3bed”）
$(document).ready(function () {
$('#typeSel').on('change', function () {
switch (this.value) {
case '1': {
$("#a1det").show();
$("#cdet,#a2det,#a3det,#a4det").hide();
$("#a1det :input,#adult1").attr("disabled", false);
$("#cdet :input,#childr :input,#a2det :input,#a3det :input,#a4det :input,#adult2,#adult3,#adult4").attr("disabled", true);
document.getElementById("booktype").value = "1";
document.getElementById("adultNum").value = "1";
document.getElementById("childNum").value = "0";
booktype = 1;
return booktype;
break;
}
case '2': {
$("#a1det, #a2det").show();
$("#cdet,#a3det,#a4det").hide();
$("#a1det :input,#a2det :input,#adult2").attr("disabled", false);
$("#cdet :input,#childr :input,#a3det :input,#a4det :input,#adult3,#adult4").attr("disabled", true);
document.getElementById("booktype").value = "2";
document.getElementById("adultNum").value = "2";
document.getElementById("childNum").value = "0";
booktype = 2;
return booktype;
break;
}
case '3': {
$("#a1det, #a2det, #a3det").show();
$("#cdet,#a4det").hide();
$("#a1det :input,#a2det :input,#a3det :input,#adult1,#adult2,#adult3").attr("disabled", false);
$("#cdet :input,#childr :input,#a4det :input,#adult4").attr("disabled", true);
document.getElementById("booktype").value = "3";
document.getElementById("adultNum").value = "3";
document.getElementById("childNum").value = "0";
booktype = 3;
return booktype;
break;
}
case '4': {
$("#a1det, #a2det, #a3det, #a4det").show();
$("#cdet").hide();
$("#a1det :input,#a2det :input,#a3det :input,#a4det :input,#adult1,#adult2,#adult3,#adult4").attr("disabled", false);
$("#cdet :input,#childr :input").attr("disabled", true);
document.getElementById("booktype").value = "4";
document.getElementById("adultNum").value = "4";
document.getElementById("childNum").value = "0";
booktype = 4;
return booktype;
break;
}
case '5': {
$("#a1det, #a2det, #cdet, #c1det").show();
$("#a3det,#a4det,#c2det,#c3det").hide();
$("#a1det :input,#a2det :input,#c1det :input, #child1,#adult1,#adult2,#childTotal").attr("disabled", false);
$("#child2,#child3,#adult3,#adult4,#a3det :input,#a4det :input,#c2det :input,#c3det :input").attr("disabled", true);
document.getElementById("booktype").value = "5";
document.getElementById("adultNum").value = "2";
document.getElementById("childNum").value = "1";
booktype = 5;
return booktype;
break;
}
case '6': {
$("#a1det, #a2det, #cdet, #c1det, #c2det").show();
$("#a3det,#a4det,#c3det").hide();
$("#a1det :input,#a2det :input,#c1det :input,#c2det :input,#adult1,#adult2,#child1,#child2,#childTotal").attr("disabled", false);
$("#child3,#adult3,#adult4,#a3det :input,#a4det :input,#c3det :input").attr("disabled", true);
document.getElementById("booktype").value = "6";
document.getElementById("adultNum").value = "2";
document.getElementById("childNum").value = "2";
booktype = 6;
return booktype;
break;
}
case '7': {
$("#a1det, #a2det, #cdet, #c1det, #c2det, #c3det").show();
$("#a3det,#a4det").hide();
$("#a1det :input,#a2det :input,#c1det :input,#c2det :input,#c3det :input,#adult1,#adult2,#child1,#child2,#child3,#childTotal").attr("disabled", false);
$("#adult3,#adult4,#a3det :input,#a4det :input").attr("disabled", true);
document.getElementById("booktype").value = "7";
document.getElementById("adultNum").value = "2";
document.getElementById("childNum").value = "3";
booktype = 7;
return booktype;
break;
}
case '8': {
$("#a1det, #a2det, #a3det, #cdet, #c1det").show();
$("#a4det,#c2det,#c3det").hide();
$("#a1det :input,#a2det :input,#a3det :input,#c1det :input, #child1,#adult1,#adult2,#adult3,#childTotal").attr("disabled", false);
$("#child2,#child3,#adult4,#a4det :input,#c2det :input,#c3det :input").attr("disabled", true);
document.getElementById("booktype").value = "8";
document.getElementById("adultNum").value = "3";
document.getElementById("childNum").value = "1";
booktype = 8;
return booktype;
break;
}
case '9': {
$("#a1det, #a2det, #a3det, #cdet, #c1det, #c2det").show();
$("#a4det,#c3det").hide();
$("#a1det :input,#a2det :input,#a3det :input,#c1det :input,#c2det :input,#child1,#child2,#adult1,#adult2,#adult3,#childTotal").attr("disabled", false);
$("#child3,#adult4,#a4det :input,#c3det :input").attr("disabled", true);
document.getElementById("booktype").value = "9";
document.getElementById("adultNum").value = "3";
document.getElementById("childNum").value = "2";
booktype = 9;
return booktype;
break;
}
}
return booktype;
calcTotal();
});
$('#c1bed').on('change', function () {
switch (this.value) {
case 'a': {
child1 = childa;
break;
}
case 'b': {
child1 = childb;
break;
}
case 'c': {
child1 = childc;
break;
}
case 'd': {
child1 = childd;
break;
}
}
document.getElementById("child1").value = child1;
calcTotal();
return child1;
});
$('#c2bed').on('change', function () {
switch (this.value) {
case 'a': {
child2 = childa;
break;
}
case 'b': {
child2 = childb;
break;
}
case 'c': {
child2 = childc;
break;
}
case 'd': {
child2 = childd;
break;
}
}
document.getElementById("child2").value = child2;
calcTotal();
return child2;
});
$('#c3bed').on('change', function () {
switch (this.value) {
case 'a': {
child3 = childa;
break;
}
case 'b': {
child3 = childb;
break;
}
case 'c': {
child3 = childc;
break;
}
case 'd': {
child3 = childd;
break;
}
}
document.getElementById("child3").value = child3;
calcTotal();
return child3;
});
});
function calcTotal() {
switch (booktype) {
case '1': {
adultTotal = adult1;
childTotal = 0;
document.getElementById("adultTotal").value = adultTotal;
document.getElementById("childTotal").value = childTotal;
break;
}
case '2': {
adultTotal = +adult1 + +adult2;
childTotal = 0;
document.getElementById("adultTotal").value = adultTotal;
document.getElementById("childTotal").value = childTotal;
break;
}
case '3': {
adultTotal = +adult1 + +adult2 + +adult3;
childTotal = 0;
document.getElementById("adultTotal").value = adultTotal;
document.getElementById("childTotal").value = childTotal;
break;
}
case '4': {
adultTotal = +adult1 + +adult2 + +adult3 + +adult4;
childTotal = 0;
document.getElementById("adultTotal").value = adultTotal;
document.getElementById("childTotal").value = childTotal;
break;
}
case '5': {
adultTotal = +adult1 + +adult2;
childTotal = +child1;
document.getElementById("adultTotal").value = adultTotal;
document.getElementById("childTotal").value = childTotal;
break;
}
case '6': {
adultTotal = +adult1 + +adult2;
childTotal = +child1 + +child2;
document.getElementById("adultTotal").value = adultTotal;
document.getElementById("childTotal").value = childTotal;
break;
}
case '7': {
adultTotal = +adult1 + +adult2;
childTotal = +child1 + +child2 + +child3;
document.getElementById("adultTotal").value = adultTotal;
document.getElementById("childTotal").value = childTotal;
break;
}
case '8': {
adultTotal = +adult1 + +adult2 + +adult3;
childTotal = +child1;
document.getElementById("adultTotal").value = adultTotal;
document.getElementById("childTotal").value = childTotal;
break;
}
case '9': {
adultTotal = +adult1 + +adult2 + +adult3;
childTotal = +child1 + +child2;
document.getElementById("adultTotal").value = adultTotal;
document.getElementById("childTotal").value = childTotal;
break;
}
}
totalFare = +adultTotal + +childTotal;
document.getElementById("totalFare").value = totalFare;
}
答案 0 :(得分：1)
我只专注于第一个开关，因为你的代码真的很乱，很难理解......
calcTotal()必须 befor return。返回语句将跳出函数，其下的任何内容都不会执行。
您的switch非常多余。您想要做的只是将value作为number返回。这可以通过Number(this.value)实现。为了您的回报，您必须致电calcTotal()。
$('#typeSel').on('change', function() {
calcTotal();
return Number(this.value);
});