js保留小数点后两位 整数保留后两位

numFilter(num) {

let f = parseFloat(num)

if(isNaN(f)) {

return false

}

f = Math.round(num * 100) / 100

let s = f.toString()

let rs = s.indexOf(‘ . ’)

if(rs < 0) {

rs = s.length

s += ‘ . ‘

}

while(s.length <= rs +2) {

s += ‘ 0 ‘

}

return s

}