Question

我想像这样实时计算不含税的价格：

包含价格的税（ priceTi ）= 550

TaxRate = 10％

不含税的价格（ priceTe ）应为= 500

问题是我得到 priceTe = 499.99999999999999

$(document).on('keyup', "#priceTi", function () {

    var priceTe = $('#priceTe');
    var taxRate = $('#taxRate');
    var priceTi = $('#priceTi');

    if (taxRate.val() != "") {
        value = this.value.replace(/,/g, '.');
        var tax = parseFloat((taxRate.val()/100) + 1) ;

        $('#priceTe').val(parseFloat(value) / tax ) ;

        return false;
    }
});

Answer 1

通过使用.toFixed（2），您可以获得所需的结果。

{"message":"WARC-Target-URI: http://www.archive.org/robots.txt","@version":"1","@timestamp":"2016-11-22T12:55:48.151Z","path":"D:\\better.txt","host":"FREIFDKT0021127","url":"http://www.archive.org/robots.txt"}
{"message":"WARC-Target-URI: http://www.archive.org/","@version":"1","@timestamp":"2016-11-22T12:55:48.151Z","path":"D:\\better.txt","host":"FREIFDKT0021127","url":"http://www.archive.org/"}
{"message":"HTTP/1.1 200 OK","@version":"1","@timestamp":"2016-11-22T12:55:48.167Z","path":"D:\\better.txt","host":"FREIFDKT0021127","response":"200"}
{"message":"Date: Wed, 30 Apr 2008 20:48:25 GMT","@version":"1","@timestamp":"2016-11-22T12:55:48.167Z","path":"D:\\better.txt","host":"FREIFDKT0021127","date":"2008-04-30T20:48:25.000Z"}
{"message":"WARC-Target-URI: http://www.archive.org/","@version":"1","@timestamp":"2016-11-22T12:55:48.183Z","path":"D:\\better.txt","host":"FREIFDKT0021127","url":"http://www.archive.org/"}
{"message":"WARC-Target-URI: http://www.archive.org/","@version":"1","@timestamp":"2016-11-22T12:55:48.183Z","path":"D:\\better.txt","host":"FREIFDKT0021127","url":"http://www.archive.org/"}
{"message":"WARC-Target-URI: http://www.archive.org/index.php","@version":"1","@timestamp":"2016-11-22T12:55:48.183Z","path":"D:\\better.txt","host":"FREIFDKT0021127","url":"http://www.archive.org/index.php"}
{"message":"HTTP/1.1 200 OK","@version":"1","@timestamp":"2016-11-22T12:55:48.198Z","path":"D:\\better.txt","host":"FREIFDKT0021127","response":"200"}
{"message":"Date: Wed, 30 Apr 2008 20:48:25 GMT","@version":"1","@timestamp":"2016-11-22T12:55:48.198Z","path":"D:\\better.txt","host":"FREIFDKT0021127","date":"2008-04-30T20:48:25.000Z"}

您也可以使用round来舍入到最接近的整数。 .49将向下舍入，.5将向上舍入。此功能为$(document).on('keyup', "#priceTi", function () { var priceTe = $('#priceTe'); var taxRate = $('#taxRate'); var priceTi = $('#priceTi'); if (taxRate.val() != "") { value = this.value.replace(/,/g, '.'); var tax = parseFloat((taxRate.val()/100) + 1) ; $('#priceTe').val(parseFloat(value) / tax ).toFixed(2) ; return false; } });

计算不含税的价格并不能给出确切的价格

1 个答案: