【发布时间】：2019-12-02 21:19:18
【问题描述】：
有没有办法让我通过数量来显示价格&当我在输入文本中输入一个数字时，例如我点击 + 按钮然后它变为 2 数量然后价格将自动计算为 x2 这是我的减号和加号及其输入类型文本的 js 代码
我的输入文本
$(".input-number").keydown(function (e) {
// Allow: backspace, delete, tab, escape, enter and .
if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 190]) !== -1 ||
// Allow: Ctrl+A
(e.keyCode == 65 && e.ctrlKey === true) ||
// Allow: home, end, left, right
(e.keyCode >= 35 && e.keyCode <= 39)) {
// let it happen, don't do anything
return;
}
// Ensure that it is a number and stop the keypress
if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
e.preventDefault();
}
});
这里是html代码和js
我想在我的
<h3 class>Total : </h3
$('.btn-number').click(function(e) {
e.preventDefault();
fieldName = $(this).attr('data-field');
type = $(this).attr('data-type');
var input = $("input[name='" + fieldName + "']");
var currentVal = parseInt(input.val());
if (!isNaN(currentVal)) {
if (type == 'minus') {
if (currentVal > input.attr('min')) {
input.val(currentVal - 1).change();
}
if (parseInt(input.val()) == input.attr('min')) {
//$(this).attr('disabled', true);
}
} else if (type == 'plus') {
if (currentVal < input.attr('max')) {
input.val(currentVal + 1).change();
}
if (parseInt(input.val()) == input.attr('max')) {
// $(this).attr('disabled', true);
}
}
} else {
input.val(0);
}
});
$('.input-number').focusin(function() {
$(this).data('oldValue', $(this).val());
});
$('.input-number').change(function() {
minValue = parseInt($(this).attr('min'));
maxValue = parseInt($(this).attr('max'));
valueCurrent = parseInt($(this).val());
name = $(this).attr('name');
if (valueCurrent >= minValue) {
$(".btn-number[data-type='minus'][data-field='" + name + "']").removeAttr('disabled')
} else {
alert('Sorry, the minimum value was reached');
$(this).val($(this).data('oldValue'));
}
if (valueCurrent <= maxValue) {
$(".btn-number[data-type='plus'][data-field='" + name + "']").removeAttr('disabled')
} else {
alert('Sorry, the maximum value was reached');
$(this).val($(this).data('oldValue'));
}
});
$(".input-number").keydown(function(e) {
// Allow: backspace, delete, tab, escape, enter and .
if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 190]) !== -1 ||
// Allow: Ctrl+A
(e.keyCode == 65 && e.ctrlKey === true) ||
// Allow: home, end, left, right
(e.keyCode >= 35 && e.keyCode <= 39)) {
// let it happen, don't do anything
return;
}
// Ensure that it is a number and stop the keypress
if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
e.preventDefault();
}
});<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="input-group col-xs-2">
<span class="input-group-btn">
<button type="button" class="btn btn-danger btn-number" data-type="minus" data-field="quant[2]">
<span class="fa fa-minus"></span>
</button>
</span>
<input type="text" name="quant[2]" class="form-control input-number" value="1" min="1" max="10">
<span class="input-group-btn">
<button type="button" class="btn btn-success btn-number" data-type="plus" data-field="quant[2]">
<span class="fa fa-plus"></span>
</button>
</span>
</div>
<h3 class="bookingroom">Total: PHP 2,750.00</h3>【问题讨论】：
标签： javascript jquery html