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 HTMl代码

<div id="time"></div>

JS代码

const time = document.getElementById('time');
//获取当前时间
function getTime(){
    let date = new Date();
    let year = date.getFullYear();
    let month = date.getMonth()+1;
    let day = date.getDate();
    let hour = date.getHours();
    let minute = date.getMinutes();
    let second = date.getSeconds();
    let week = date.getDay();
    let weekArr = ['日','一','二','三','四','五','六'];
    let str = `${year}年${month}月${day}日${hour}时${minute}分${second}秒 星期${weekArr[week]}`;
    time.innerHTML = str;
}
getTime();
setInterval(getTime,1000);

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