單擊“減號”跨度時，“計數”輸入中的值會減少，但當它達到 0 時應停止減小。因此，我禁用了“減號”跨度，但當值再次為正時，它仍保持禁用狀態。
$(document).on('click','.plus',function(){
$(this).closest('.content').find('.count').val(parseInt($(this).closest('.content').find('.count').val()) 1 );
});
$(document).on('click','.minus',function(){ $(this).closest('.content').find('.count').val(parseInt($(this).closest('.content').find('.count').val()) - 1 );
if ($(this).closest('.content').find('.count').val() == 0) {
$(this).closest('.content').find('.count').val(0);
$(this).closest('.minus').prop('disabled', true);
}else{
$(this).closest('.minus').prop('disabled', false);
}
}); .qty .count {
border: 1px solid #e1ecfb;
color: #000;
display: inline-block;
vertical-align: top;
font-size: 15px;
font-weight: 450;
padding: 0 0;
width: 35px;
text-align: center;
}
.qty .plus {
cursor: pointer;
display: inline-block;
vertical-align: top;
color: white;
background-color: #cee0f9;
width: 25px;
height: 25px;
font: 25px/1 Arial,sans-serif;
text-align: center;
border-radius: 30%;
}
.qty .minus {
cursor: pointer;
display: inline-block;
vertical-align: top;
color: #ffffff;
background-color: #cee0f9;
width: 25px;
height: 25px;
font: 23px/1 Arial,sans-serif;
text-align: center;
border-radius: 30%;
background-clip: padding-box;
}<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-F3w7mX95PdgyTmZZMECAngseQB83DfGTowi0iMjiWaeVhAn4FJkqJByhZMI3AhiU" crossorigin="anonymous">
<link rel="stylesheet" href="https://pro.fontawesome.com/releases/v5.10.0/css/all.css" integrity="sha384-AYmEC3Yw5cVb3ZcuHtOA93w35dYTsvhLPVnYs9eStHfGJvOvKxVfELGroGkvsg p" crossorigin="anonymous"/>
<title>Document</title>
</head>
<body>
<div class="produk_list">
<div class="container-fluid" style="padding-bottom:50px;">
<div class="row data_produk" id="data_produk" style="text-align: center;">
<div class="col-6 gallery" value="1">
<div class="content">
<img src="https://awsimages.detik.net.id/community/media/visual/2021/04/06/sandwich-keju-tomat-dan-alpukat-1_43.jpeg?w=700&q=90" width="150" height="150">
<h6>Product Name</h6>
<h6>Product Price</h6>
<div class="qty" id="qty">
<span class=" btn-primary minus b-dark">-</span>
<input type="number" class="count" name="qty" value="1">
<span class="plus b-dark"> </span>
</div>
<button class="buy-1 btn-button" id="pesan"><i class="fas fa-cart-plus"></i></button>
</div>
</div>
</div>
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</body>
</html>uj5u.com熱心網友回復：
試試下面的代碼它作業正常。
$(document).on('click','.plus',function(){
var currVal = parseInt($('.count').val()) parseInt(1);
$('.count').val(currVal);
$('.minus').prop('disabled', false);
});
$(document).on('click','.minus',function(){
var currVal = parseInt($('.count').val()) - parseInt(1);
$('.minus').prop('disabled', false);
if(currVal == 0){
$('.minus').prop('disabled', true);
}
$('.count').val(currVal);
});
uj5u.com熱心網友回復：
問題是它else永遠不會到達，因為當它為 0 時它現在被禁用并且不會再次被點擊。
嘗試這個：
$(document).on('click','.plus',function(){
let countField=$(this).siblings('.count');
let iniVal=parseInt(countField.val());
iniVal ;
countField.val(iniVal);
$(this).siblings('.minus').prop('disabled', false);
});
$(document).on('click','.minus',function(){
let countField=$(this).siblings('.count');
let iniVal=parseInt(countField.val());
iniVal--;
countField.val(iniVal);
if(iniVal===0){
$(this).prop('disabled', true);
}
});
或者你可以避免使用 .prop():
$(document).on('click','.plus',function(){
let countField=$(this).siblings('.count');
let iniVal=parseInt(countField.val());
iniVal ;
countField.val(iniVal);
});
$(document).on('click','.minus',function(){
let countField=$(this).siblings('.count');
let iniVal=parseInt(countField.val());
if(iniVal>0){
iniVal--;
countField.val(iniVal);
}
});
轉載請註明出處，本文鏈接：https://www.uj5u.com/net/326176.html
標籤：javascript html 查询 表现 if 语句