JS:
function Money(value, num) {
num = num > 0 && num <= 20 ? num : 2;
value = parseFloat((value + "").replace(/[^\d\.-]/g, "")).toFixed(num) + ""; //将金额转成比如 123.45的字符串
var valueArr = value.split(".")[0].split("") //将字符串的数变成数组
const valueFloat = value.split(".")[1]; // 取到 小数点后的值
let valueString = "";
for (let i = 0; i < valueArr.length; i++) {
valueString += valueArr[i] + ((i + 1) % 3 == 0 && (i + 1) != valueArr.length ? "," : ""); //循环 取数值并在每三位加个','
}
const money = valueString.split("").join("") + "." + valueFloat; //拼接上小数位
return money
}
使用方法:
Money(value,num)的第一位value是必传的,第二位num是选填的 不填是保留两位小数
console.log(Money('123456789',2))
console.log(Money('123456789.789'))
console.log(Money('123456789.789',2))
console.log(Money('123456789.789',4))
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