js 四舍五入保留两位小数

changeTwoDecimal(x) {
let f_x = parseFloat(x)
if (isNaN(f_x)) {
return 0
}
let f_x = Math.round(x * 100) / 100
let s_x = f_x.toString()
let pos_decimal = s_x.indexOf('.')
if (pos_decimal < 0) { pos_decimal = s_x.length s_x += '.' } while (s_x.length <= pos_decimal + 2) { s_x += '0' } return s_x },

js 四舍五入保留两位小数最先出现在Python成神之路。