我想用JavaScript格式化价格。我想要一个函数,它将浮点作为参数,并返回如下格式的字符串:

"$ 2,500.00"

我该怎么做?


当前回答

+1向Jonathan M提供原始方法。由于这是一个明确的货币格式化程序,我继续在输出中添加了货币符号(默认为“$”),并添加了一个默认逗号作为千位分隔符。如果您实际上不需要货币符号(或千位分隔符),只需使用“”(空字符串)作为它的参数。

Number.prototype.formatMoney = function(decPlaces, thouSeparator, decSeparator, currencySymbol) {
    // check the args and supply defaults:
    decPlaces = isNaN(decPlaces = Math.abs(decPlaces)) ? 2 : decPlaces;
    decSeparator = decSeparator == undefined ? "." : decSeparator;
    thouSeparator = thouSeparator == undefined ? "," : thouSeparator;
    currencySymbol = currencySymbol == undefined ? "$" : currencySymbol;

    var n = this,
        sign = n < 0 ? "-" : "",
        i = parseInt(n = Math.abs(+n || 0).toFixed(decPlaces)) + "",
        j = (j = i.length) > 3 ? j % 3 : 0;

    return sign + currencySymbol + (j ? i.substr(0, j) + thouSeparator : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + thouSeparator) + (decPlaces ? decSeparator + Math.abs(n - i).toFixed(decPlaces).slice(2) : "");
};

其他回答

我想要一个自动返回小数部分的普通JavaScript解决方案。

function formatDollar(amount) {
    var dollar = Number(amount).toLocaleString("us", "currency");
    // Decimals
    var arrAmount = dollar.split(".");
    if (arrAmount.length==2) {
        var decimal = arrAmount[1];
        if (decimal.length==1) {
            arrAmount[1] += "0";
        }
    }
    if (arrAmount.length==1) {
        arrAmount.push("00");
    }

    return "$" + arrAmount.join(".");
}


console.log(formatDollar("1812.2");

Intl.NumberFormat(国际数字格式)

var number = 3500;
alert(new Intl.NumberFormat().format(number));
// → "3,500" if in US English locale

或者JavaScript中的PHP的number_format。

适用于所有当前浏览器

使用toLocaleString以货币的语言敏感表示形式格式化货币(使用ISO 4217货币代码)。

(2500).toLocaleString("en-GB", {style: "currency", currency: "GBP", minimumFractionDigits: 2})

avenmore的南非兰特代码片段示例:

console.log((2500).toLocaleString(“en-ZA”,{style:“currency”,currency:“ZAR”,minimumFractionDigits:2}))//->2 500,00兰特console.log((2500).toLocaleString(“en-GB”,{style:“currency”,currency:“ZAR”,minimumFractionDigits:2}))//->2500欧元

另一种方式:

function centsToDollaString(x){
  var cents = x + ""
  while(cents.length < 4){
    cents = "0" + cents;
  }
  var dollars = cents.substr(0,cents.length - 2)
  var decimal = cents.substr(cents.length - 2, 2)
  while(dollars.length % 3 != 0){
    dollars = "0" + dollars;
  }
  str = dollars.replace(/(\d{3})(?=\d)/g, "$1" + ",").replace(/^0*(?=.)/, "");
  return "$" + str + "." + decimal;
}

我喜欢简单:

function formatPriceUSD(price) {
    var strPrice = price.toFixed(2).toString();
    var a = strPrice.split('');

    if (price > 1000000000)
        a.splice(a.length - 12, 0, ',');

    if (price > 1000000)
        a.splice(a.length - 9, 0, ',');

    if (price > 1000)
        a.splice(a.length - 6, 0, ',');

    return '$' + a.join("");
}