SOURCE

function format(time) {
    if(String(time).indexOf('分钟') >= 0) {
       let time1 =  time.slice(0,time.length-1).replace('分钟',':')
       return time1.split(':')[0].padStart(2,'0')+":"+time1.split(':')[1].padStart(2,'0')
    }else {
        return "00:"+time.split('秒')[0].padStart(2,'0')
    }
}


console.log(format('10分钟10秒'))
console.log(format('20秒'))