对不起，等待，由于某种原因，这一行正在攻击我的代码。

val = parseInt( val.replace(/,/g,''), 10 );

字符串
我把它改成：

val = val.replace(/,/g,'');

型
它似乎有同样的功能，同时允许我做我的事情。下面是代码。我使用正则表达式来测试val中的一个周期。（if语句），然后将瓦尔拆分为句号之前和之后的内容。split函数中的2应该只允许2个字符串从其中出来，这意味着10.20将变成'10'和'20'，而1.2.3将变成'1'和'2'，并丢弃3。数组从0开始，因此valArray[0]是数组中的第一个字符串，valArray[1]是第二个。

val = val.toString();
var valArray = val.split('\.', 2); //splits val into two seperate integers, whole numbers and decimals, in an array.   
val = valArray[0]; //this is the whole number
var val2 = valArray[1]; //this should be the decimals

if(val2 != null && val2 != ''){
//convert the decimals here
var str2 = 'TWENTY CENTS';
}
else{
var str2 = '';
}

型
更新：FIDDLE

这里是一个完整的版本使用美元和美分

const num2text = {
  ones: ['', 'ONE', 'TWO', 'THREE', 'FOUR', 'FIVE', 'SIX', 'SEVEN', 'EIGHT', 'NINE', 'TEN', 'ELEVEN', 'TWELVE', 'THIRTEEN', 'FOURTEEN', 'FIFTEEN', 'SIXTEEN', 'SEVENTEEN', 'EIGHTEEN', 'NINETEEN'],
  tens: ['', '', 'TWENTY', 'THIRTY', 'FOURTH', 'FIFTY', 'SIXTY', 'SEVENTY', 'EIGHTY', 'NINETY'],
  sep: ['', ' THOUSAND ', ' MILLION ', ' BILLION ', ' TRILLION ', ' QUADRILLION ', ' QUINTILLION ', ' SEXTILLION ']
};
const convert = function(val) {
  if (val.length === 0) {
    return '';
  }

  val = val.replace(/,/g, '');
  if (isNaN(val)) {
    return 'Invalid input.';
  }


  let [val1, val2] = val.split(".")
  let str2 = "";
  if (val2 != null && val2 != '') {
    //convert the decimals here
    var digits = (val2+"0").slice(0,2).split("");
    str2 = num2text.tens[+digits[0]] + " " + num2text.ones[+digits[1]]
  }
  let arr = [];
  while (val1) {
    arr.push(val1 % 1000);
    val1 = parseInt(val1 / 1000, 10);
  }
  let i = 0;
  let str = "";
  while (arr.length) {
    str = (function(a) {
      var x = Math.floor(a / 100),
        y = Math.floor(a / 10) % 10,
        z = a % 10;

      return (x > 0 ? num2text.ones[x] + ' HUNDRED ' : '') +
        (y >= 2 ? num2text.tens[y] + ' ' + num2text.ones[z] : num2text.ones[10 * y + z]);
    })(arr.shift()) + num2text.sep[i++] + str;
  }

  return str +
    ' DOLLARS ' +
    (str2 ? ' AND ' + str2 + ' CENTS' : '') +
    ' ONLY';
};


window.addEventListener("load", function() {
  document.getElementById("totalamountpaid").addEventListener("input", function() {
    document.getElementById("words").innerHTML = convert(this.value)
  });
});

个字符

这是对@mplungjan的改进

const num2text = {
ones: [
    '',
    'ONE',
    'TWO',
    'THREE',
    'FOUR',
    'FIVE',
    'SIX',
    'SEVEN',
    'EIGHT',
    'NINE',
    'TEN',
    'ELEVEN',
    'TWELVE',
    'THIRTEEN',
    'FOURTEEN',
    'FIFTEEN',
    'SIXTEEN',
    'SEVENTEEN',
    'EIGHTEEN',
    'NINETEEN',
],
tens: [
    '',
    '',
    'TWENTY',
    'THIRTY',
    'FOURTY',
    'FIFTY',
    'SIXTY',
    'SEVENTY',
    'EIGHTY',
    'NINETY',
],
sep: [
    '',
    ' THOUSAND ',
    ' MILLION ',
    ' BILLION ',
    ' TRILLION ',
    ' QUADRILLION ',
    ' QUINTILLION ',
    ' SEXTILLION ',
],
};

export const convertAmountToWords = function (
amount: any,
currency?: string,
smallestUnit?: string
) {
if (!amount) return '';

if (amount.length === 0) {
    return '';
}

amount = amount.replace(/,/g, '');

if (isNaN(amount)) {
    return 'Invalid input.';
}

// eslint-disable-next-line prefer-const
let [val1, val2] = amount.split('.');
let str2 = '';
if (val2 != null && val2 != '') {
    //convert the decimals here
    const digits = (val2 + '0').slice(0, 2).split('');
    str2 = convertAmountToWords(digits.join(''));
}
const arr = [];
while (val1) {
    arr.push(val1 % 1000);
    val1 = parseInt(String(val1 / 1000), 10);
}
let i = 0;
let str = '';
while (arr.length) {
    str =
        (function (a) {
            if (!a) return '';

            const x = Math.floor(a / 100),
                y = Math.floor(a / 10) % 10,
                z = a % 10;

            return (
                (x > 0 ? num2text.ones[x] + ' HUNDRED AND ' : '') +
                (y >= 2
                    ? num2text.tens[y] + ' ' + num2text.ones[z]
                    : num2text.ones[10 * y + z])
            );
        })(arr.shift()) +
        num2text.sep[i++] +
        str;
}

if (!currency) return str;

return (
    str +
    ` ${currency}` +
    (str2 ? ', ' + str2 + ` ${smallestUnit}` : '')
).toLowerCase();
};

字符串