docunemt.write()问题

Question

我想打印时间时把之前打印的时间的清掉，只让他打印一次，求解

var str = ""
function getTime(){
    document.write(str)
    var data = new Date()
    var year = data.getFullYear()
    var mon = data.getMonth()
    var day = data.getDate()
    var hour = data.getHours()
    var min = data.getMinutes()
    var sec = data.getSeconds()
    
    str = year+"年"+mon+"月"+day+"日"+hour+"时"+min+"分"+sec+"秒"
    document.write(str)
}
getTime()

setInterval(getTime,1000)

Answer 1

document.write改成document.documentElement.textContent = str

Answer 2

HMMOPHJLNPDSTHKZBCIKYMMMNORSUIJLRNNBDLMBCEFGGGUWLBQEFYNZAOCJXYZACQBDRKYBPEFTHNNPQTUWJKMSHICPYYBVVJDDLYSTHFMABBKOOGPPQKRSSIBOIDELZMGAZGGNPJHTZTAFJJENHHBVPCUGTYMNUUOCPXDDKDRLESMAATNGUANBBPJVVIXYZUBVWWREAHOCAQJGTSUCJQDRSGHUGOEELZHOIDCYSEAABIJESNMYAWYTUAJROIBBJQYABOJXKJXKSAHQDRSWOBJPDKEEZNXANVWBDXEMXBNHQEZAGOOPZAGCERZTLFZAMFMUVIOCJKOHCQRRYRLZTBVVVWQEGOJUVJQRFGTUIWCNGBQWLMGUVJVBJISSAOIWDHTUHVIVNPPCIUUANNANANAJVHABBCDQERIUHUMMNMZAMBOOGTGTTHUHIVNNABOOAABAZMNNAABOOBQCCPJJIIVJIIHTTUHUHVIABAFFIIIJJWIZZMOOQDQDEIUTFSGGTLLMYQPPPPRQFKKKGGGIVIVAZMAIHTUUUHHUUMCBACVUHUGHTMYKKESHUGGGVHTGUANNZMMFMYZMNAZZZZLLYXLMBSTGGBBAAPPEERSSJIVANANBOBOYCPCQQDDDDQTFSSGGUIWJJEPBBCDEQDQJHGTGGLYKXYXNZYNNAANSSFXJJJWYYLYEEXJXCCCCCCPPBNNNCDCHUHU