时间日期格式补零

dataFormat ( date ) {
    //   Ps：日期格式 date="2021-01-01 23:59:59"
    if ( !date ) {
        var current = new Date()
        date = `${current.getFullYear()}-${current.getMonth() + 1}-${current.getDate()} ${current.getHours()}:${current.getMinutes()}:${current.getSeconds()}`
    }
    var arr = date.split(" ")[0].split("-")
    arr[1] = arr[1].length === 1 ? 0 + arr[1] : arr[1]
    arr[2] = arr[2].length === 1 ? 0 + arr[2] : arr[2]
    return arr.join("-")
}

© 此情可待成追忆，只是当时已惘然。