Question

我正在开发一个POS项目，在手动添加客户提供的金额后，我需要实时减法。我不确定我的代码出了什么问题，所以请一点帮助。

<div class="sidebar-category">
    <div class="category-content" style="padding: 8px">
        <div class="row">
            <div class="col-sm-6">
                <input id="client_paid" type="text" placeholder="Paguar" class="form-control" >
                <br>
                <input  id="change" type="text" placeholder="Resto" class="form-control change">
            </div>

            <div class="col-sm-6">
                <h6 class="text-semibold text-right no-margin-top">Totali: <span id = "all-products-subtotal"> {{Session::get('all_products_subtotal') ? number_format(Session::get('all_products_subtotal'),2,",","."):'0'}} </span> </h6>
                <ul class="list list-unstyled text-right">
                Status: &nbsp;
                <a href="#" class="label bg-success-400 dropdown-toggle" data-toggle="dropdown">Online</a>
                </ul>
            </div>
        </div>
    </div>
</div>

这个脚本：

<script>
    $("#client_paid").keyup(function(){
        var client_paid = this.val();
        var total ={{Session::get('all_products_subtotal') ? number_format(Session::get('all_products_subtotal'),2,",","."):'0'}};

        if(client_paid >= total){
            var change = client_paid - total;
            $("#change").val(change);
        }
    });
</script>

Here is a illustrating picture

Answer 1

检查您的功能是否正常启动，是否使用$(document).ready？您也可以尝试将this.val()替换为$(this).val()

Javascript实时减法

1 个答案: