使用jquery显示小数，但如果小数为零则不显示

Question

我有这个代码，和可以正常工作，但是如果像.0000这样，我需要隐藏小数，现在我使用的是.toFixed，但它呈现的是零而不是什么

$('#peso_combinado').keyup(function() {
    var peso_combinado = $('#peso_combinado').val();
    var cantidad = Number($('#sacos').val());
    var peso_tara = Number($('#peso_tara').val());


    var medividen = 0;
    var total_tara = 0;
    var neto_total = 0;

    total_tara = peso_tara * cantidad;
    medividen = peso_combinado / cantidad;



    neto_total = (peso_combinado - total_tara) / 100;

    $('#peso_total').val(peso_combinado.toFixed(4));
    $('#total_tara').val(total_tara.toFixed(4));
    $('#peso_neto').val(neto_total.toFixed(4));
    $('.total_combinado').val(medividen.toFixed(4));
    $('#total_por_saco').attr('name', '');
    $('.total_combinado').attr('name', 'peso_proporcional');
    $('#total_por_saco').attr('id', '');
    $('.total_combinado').attr('id', 'peso_proporcional');
});

有什么想法吗？

Answer 1

如果您希望仅在尾随数字的所有都为0的情况下删除它们，则最简单的方法可能是使用.replace(/\.0+$/,'')

这里使用的正则表达式/\.0+$/基本上表示匹配任何以.开头的字符组，后跟至少一个但不超过任意数量的以字符串结尾终止的0。

举个例子：

​

//when float has only 0s after the decimal place, replace them
var medividen = 46.0000
$('.total_combinado').append(medividen.toFixed(4).replace(/\.0+$/,'') +'<br>');


//wont affect floats that do have digits other than 0 after the decimal
medividen = 46.3400
$('.total_combinado').append(medividen.toFixed(4).replace(/\.0+$/,'')+'<br>');


//also wont hurt floats that start with 00 but then have other numbers
medividen = 46.0034
$('.total_combinado').append(medividen.toFixed(4).replace(/\.0+$/,'')+'<br>');

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="total_combinado"></div>

​

Answer 2

只需在变量前面添加加号(+)，如下所示：

var number = 1.3000001;
var total = +number.toFixed(2);

在您的示例中：

$('#peso_total').val(+peso_combinado.toFixed(4));

来源：https://javascript.info/number

Answer 3

.toFixed(x)返回一个字符串。只需再次将其解析为浮点数：

function tofixed(val) {
    return parseFloat(val.toFixed(4));
}

$('#peso_combinado').keyup(function () {
    var peso_combinado = $('#peso_combinado').val();
    var cantidad = Number($('#sacos').val());
    var peso_tara = Number($('#peso_tara').val());


    var medividen = 0;
    var total_tara = 0;
    var neto_total = 0;


    total_tara = peso_tara * cantidad;
    medividen = peso_combinado / cantidad;



    neto_total = (peso_combinado - total_tara) / 100;

    $('#peso_total').val(tofixed(peso_combinado));
    $('#total_tara').val(tofixed(total_tara));
    $('#peso_neto').val(tofixed(neto_total));
    $('.total_combinado').val(tofixed(medividen));
    $('#total_por_saco').attr('name', '');
    $('.total_combinado').attr('name', 'peso_proporcional');
    $('#total_por_saco').attr('id', '');
    $('.total_combinado').attr('id', 'peso_proporcional');
});