js 保留最多两位小数

function keepMinimumNum (number: number | string, max: number = 2) {
    const num = Number(number)
    if(max <= 0) return number
    const num1 =  Number((num * Math.pow(10, max)).toFixed(0))
    const dNum = num1 % 10
    if (dNum === 0)  {
        return keepMinimumNum(num1 / Math.pow(10, max), max - 1)
    }
    return num1 / Math.pow(10, max)
}

保留最多两位小数，如果最后一位小数是0则不保留

keepMinimumNum(0.004)  // 0
keepMinimumNum(0.005)  // 0.01
keepMinimumNum(0.00)  // 0
keepMinimumNum(0.10)  // 0.1