js千分位分隔，數字貨幣化—4種方法（含正則）
// 整數貨幣化function intcurrency(num)
var numstring = parseint(num).tostring();
var len = numstring.length;
if (len < 3)
var n = len % 3;
if (n > 0) /g).join(",");
} else /g).join(",");}}
console.group("------------整數貨幣化")
console.log(intcurrency("abs"))
console.log(intcurrency("0"))
console.log(intcurrency("10"))
console.log(intcurrency("100"))
console.log(intcurrency("1000"))
console.log(intcurrency("10000"))
console.log(intcurrency("100000"))
console.log(intcurrency("1000000"))
console.log(intcurrency("10000000"))
console.log(intcurrency("100000000"))
console.log(intcurrency("1000000000"))
console.log(intcurrency("1000000000.0"))
console.log(intcurrency("1000000000.00"))
console.log(intcurrency("1000000000.000"))
// 整數部分function intcurrency(num)
var len = num.length;
if (len < 3)
var n = len % 3;
if (n > 0) /g).join(",");
} else /g).join(",");}}
// 小數部分
function decimalcurrency(num)
var len = num.length; // 小數部分長度
if (len < 3)
var n = len % 3;
if (n > 0) /g).join(',') + ',' + num.slice(len - n);
} else /g).join(',')}}
// 貨幣化
function currency(num) else
return intcurrency(integerpart) + (decmialpart !== undefined ? ('.' + decimalcurrency(decmialpart)) : '');
}console.group("------------整數或小數貨幣化")
console.log(currency("0"))
console.log(currency("10"))
console.log(currency("100"))
console.log(currency("1000"))
console.log(currency("10000"))
console.log(currency("100000"))
console.log(currency("1000000"))
console.log(currency("10000000"))
console.log(currency("100000000"))
console.log(currency("1000000000"))
console.log(currency("1000000000.0"))
console.log(currency("1000000000.00"))
console.log(currency("1000000000.000"))
console.log(currency("1000000000.0000"))
console.log(currency("1000000000.00000"))
// 直接使用正則function currency(num) )+(?!\d))/g, ',');
}console.group("------------取整數，正則貨幣化1")
console.log(currency("0"))
console.log(currency("10"))
console.log(currency("100"))
console.log(currency("1000"))
console.log(currency("10000"))
console.log(currency("100000"))
console.log(currency("1000000"))
console.log(currency("10000000"))
console.log(currency("100000000"))
console.log(currency("1000000000"))
console.log(currency("1000000000.0"))
console.log(currency("1000000000.00"))
console.log(currency("1000000000.000"))
console.log(currency("1000000000.0000"))
console.log(currency("1000000000.00000"))
// 直接使用正則function currency(num) )+$)/g, ',');
}console.group("------------取整數，正則貨幣化2")
console.log(currency("0"))
console.log(currency("10"))
console.log(currency("100"))
console.log(currency("1000"))
console.log(currency("10000"))
console.log(currency("100000"))
console.log(currency("1000000"))
console.log(currency("10000000"))
console.log(currency("100000000"))
console.log(currency("1000000000"))
console.log(currency("1000000000.0"))
console.log(currency("1000000000.00"))
console.log(currency("1000000000.000"))
console.log(currency("1000000000.0000"))
console.log(currency("1000000000.00000"))
正則校驗
// 正整數或小數 /^[0-9]+(\.[0-9]+)?$/g// 正、負整數或小數，也可不輸入正負 /^(\+|-)?\d+(\.\d+)?$/g
**於：
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