我有带有一些值的选择框并使用 AJAX 将数据发送到 php 并在 <div> 中显示这些数据，这是我的代码，我不知道为什么它不起作用。
当我使用按钮从中获取值(value)时，它是有效的。我已经尝试了多个教程并提出了很多关于 AJAX 和选择框的问题。
我尝试制作函数并在内部选择使用 onchange 调用它
product.php
<div id="input-option232">
<div class="checkbox">
<div class="custom-select" style="width: 200px">
<form method="get" name="rate">
<select name="rate2" id="rate2">
<option value="0">Broj Rata:</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
</select>
</form>
</div>
</div>
<div id="ratice"></div> // I WANT TO DISPLAY HERE
</div>
aj-select.js
$("#rate2").on('change', function() {
var level = $('#rate2').val();
if(level){
$.ajax ({
type: 'GET',
url: 'rate.php',
data: 'rate='+level,
success : function(data) {
$('#ratice').html(data);
}
});
}
});
rate.php
<?php
if(isset($_GET['rate'])){
echo $rate = $_GET['rate'];
}
?>
select.js
var x, i, j, selElmnt, a, b, c;
/*look for any elements with the class "custom-select":*/
x = document.getElementsByClassName("custom-select");
for (i = 0; i < x.length; i++) {
selElmnt = x[i].getElementsByTagName("select")[0];
/*for each element, create a new DIV that will act as the selected item:*/
a = document.createElement("DIV");
a.setAttribute("class", "select-selected");
a.innerHTML = selElmnt.options[selElmnt.selectedIndex].innerHTML;
x[i].appendChild(a);
/*for each element, create a new DIV that will contain the option list:*/
b = document.createElement("DIV");
b.setAttribute("class", "select-items select-hide");
for (j = 0; j < selElmnt.length; j++) {
/*for each option in the original select element,
create a new DIV that will act as an option item:*/
c = document.createElement("DIV");
c.innerHTML = selElmnt.options[j].innerHTML;
c.addEventListener("click", function(e) {
/*when an item is clicked, update the original select box,
and the selected item:*/
var y, i, k, s, h;
s = this.parentNode.parentNode.getElementsByTagName("select")[0];
h = this.parentNode.previousSibling;
for (i = 0; i < s.length; i++) {
if (s.options[i].innerHTML === this.innerHTML) {
s.selectedIndex = i;
h.innerHTML = this.innerHTML;
y = this.parentNode.getElementsByClassName("same-as-selected");
for (k = 0; k < y.length; k++) {
y[k].removeAttribute("class");
}
this.setAttribute("class", "same-as-selected");
break;
}
}
h.click();
});
b.appendChild(c);
}
x[i].appendChild(b);
a.addEventListener("click", function(e) {
/*when the select box is clicked, close any other select boxes,
and open/close the current select box:*/
e.stopPropagation();
closeAllSelect(this);
this.nextSibling.classList.toggle("select-hide");
this.classList.toggle("select-arrow-active");
});
}
function closeAllSelect(elmnt) {
/*a function that will close all select boxes in the document,
except the current select box:*/
var x, y, i, arrNo = [];
x = document.getElementsByClassName("select-items");
y = document.getElementsByClassName("select-selected");
for (i = 0; i < y.length; i++) {
if (elmnt === y[i]) {
arrNo.push(i);
} else {
y[i].classList.remove("select-arrow-active");
}
}
for (i = 0; i < x.length; i++) {
if (arrNo.indexOf(i)) {
x[i].classList.add("select-hide");
}
}
}
/*if the user clicks anywhere outside the select box,
then close all select boxes:*/
document.addEventListener("click", closeAllSelect);
CSS
<style type="text/css">
body{font-family:'Roboto', sans-serif}
.custom-select {
position: relative;
font-family: Arial;
}
.custom-select select {
display: none; /*hide original SELECT element:*/
}
.select-selected {
background-color: #f4a137;
}
/*style the arrow inside the select element:*/
.select-selected:after {
position: absolute;
content: "";
top: 14px;
right: 10px;
width: 0;
height: 0;
border: 6px solid transparent;
border-color: #fff transparent transparent transparent;
}
/*point the arrow upwards when the select box is open (active):*/
.select-selected.select-arrow-active:after {
border-color: transparent transparent #fff transparent;
top: 7px;
}
/*style the items (options), including the selected item:*/
.select-items div,.select-selected {
color: #ffffff;
padding: 8px 16px;
border: 1px solid transparent;
border-color: transparent transparent rgba(0, 0, 0, 0.1) transparent;
cursor: pointer;
user-select: none;
}
/*style items (options):*/
.select-items {
position: absolute;
background-color: #f4a137;
top: 100%;
left: 0;
right: 0;
z-index: 99;
}
/*hide the items when the select box is closed:*/
.select-hide {
display: none;
}
.select-items div:hover, .same-as-selected {
background-color: rgba(0, 0, 0, 0.1);
}
</style>
最佳答案
所以...你使用一个插件来获得一个“发烧友”select ...
该插件会创建一些新的 DOM 元素...因此用户不会真正与原始标记的选择进行交互。它仅用于创建新的...然后隐藏。
这是作为您的 <form> 的 sibling 创建的内容:
<div class="custom-select" style="width: 200px">
<form method="get" name="rate">
<select name="rate2" id="rate2">
<option value="0">Broj Rata:</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
</select>
</form>
<div class="select-selected">
Broj Rata:
</div>
<div class="select-items select-hide">
<div>Broj Rata:</div>
<div>2</div>
<div>3</div>
<div>4</div>
<div>5</div>
<div>6</div>
<div>7</div>
<div>8</div>
<div>9</div>
<div>10</div>
<div>11</div>
<div>12</div>
</div>
</div>
因此我们现在需要使用另一个选择器来捕获用户交互。
替换:
$("#rate2").on('change', function() {
与
$("[name='rate']+.select-selected+.select-items").on("click",function(){
+登录选择器是一个 "adjacent sibling selector" .它以最后一个为目标 IF 它紧跟在前一个之后(作为 DOM 中的同级)。
这就很好地解决了这个问题。
关于javascript - 无法使用 AJAX 获取选择值，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52684511/