案例：计算i从0到1000000再到6000000的时间
var time = new Date().getTime(); var timeList = []; timeStart(); function timeStart() { timeList.length = 0; timeList[0] = new Date().getTime(); } var sum = 0; for (var i = 0; i < 1000000; i++) { sum += i; } showTime(); function showTime() { if (timeList.length === 0) return 0; timeList.push(new Date().getTime()); console.log( timeList[timeList.length - 1] - timeList[timeList.length - 2] ); return timeList[timeList.length - 1] - timeList[timeList.length - 2]; } var sum = 0; for (var i = 0; i < 6000000; i++) { sum += i; } showTime(); showStart(); function showStart() { if (timeList.length === 0) return 0; timeList.push(new Date().getTime()); console.log(timeList[timeList.length - 1] - timeList[0]); return timeList[timeList.length - 1] - timeList[0]; }案例：中文日期时间 方法一：
<div id="div1"></div> <script> var div1; var cnNumber=["零","一","二","三","四","五","六","七","八","九"] init(); function init(){ div1=document.getElementById("div1"); setInterval(animation,16); } function animation(){ div1.innerHTML=getDateCN(); } function getDateCN(){ var date=new Date(); var year=getCnYear(date.getFullYear()); var month=getCnNumber(date.getMonth()+1); var day=getCnNumber(date.getDate()); var week=date.getDay(); var hour=getCnNumber(date.getHours()); var minutes=getCnNumber(date.getMinutes(),true); var seconds=getCnNumber(date.getSeconds(),true); week=week===0 ? "星期日" : "星期"+cnNumber[week]; return year+"年"+month+"月"+day+"日 "+week+" "+hour+"点"+minutes+"分"+seconds+"秒"; } function getCnYear(year){ return year.toString().split("").reduce(function(value,item){ return value+cnNumber[item]; },"") } function getCnNumber(num,bool){ if(num===0) return cnNumber[num]; if(num<10) return bool ? "零"+cnNumber[num] : cnNumber[num]; if(num===10) return "十"; if(num%10===0) return cnNumber[num/10]+"十"; if(num<20) return "十"+cnNumber[num%10]; num=num.toString(); if(num<100) return cnNumber[num[0]]+"十"+cnNumber[num[1]]; return "错误的数字" } </script>方法二：
<div id="div1"></div> <script> var arr = ["零","一","二","三","四","五","六","七","八","九","十",]; var ids; var div; init(); function init() { var div1 = document.getElementById("div1"); ids = setInterval(localTime, 16); } function localTime() { //获取当前时间 var date = new Date(); //设置time为空字符串，之后用+=将年月日连接放入 var time = ""; // 先写好年月日阿拉伯数字下的框架，在进行全汉字转换 // time += date.getFullYear() + "年"; // time += date.getMonth() + 1 + "月"; // time += date.getDate() + "日"; // time += "星期" + date.getDay(); // time += date.getHours() + "时"; // time += date.getMinutes() + "分"; // time += date.getSeconds() + "秒"; time += years(date.getFullYear()) + "年 "; time += saiban(date.getMonth() + 1) + "月 "; time += saiban(date.getDate()) + "日 "; time += "星期" + saiban(date.getDay()) + " "; time += saiban(date.getHours()) + "时"; time += saiban(date.getMinutes()) + "分"; time += saiban(date.getSeconds()) + "秒"; console.log(time); div1.innerHTML = time; } //转换年为汉字 function years(year) { //设置y为空字符串用来盛放最后的结果 var a = ""; //undefined //将获取的年份转换成字符型 year = String(year); //2020 //利用循环，当i<字符串长度时循环，将year的每一项转换为上边数组中的汉字 for (var i = 0; i < year.length; i++) { a += arr[year[i]]; } //二零二零 //将结果返回 return "公元" + a; //公元二零二零 } // 以下为月、日的汉字转换，因为转换方式相同，化作一个函数就可以 // //转换月为汉字 // function months(month){ // var b=""; // console.log(month) // if(month<10){ // b=arr[month] // } // if(month==10){ // b=arr[10] // } // if(month>10){ // if(month%10==0){ // b=arr[parseInt(month/10)]+arr[10] // } // } // return b; // } // //转换日为汉字 // function days(day){ // var c=""; // console.log(day) // if(day<10){ // c=arr[day] // } // if(day==10){ // c=arr[10] // } // if(day>10){ // if(day%10==0){ // c=arr[parseInt(day/10)]+arr[10] // } // else c = arr[parseInt(m / 10)] + arr[10] + arr[m % 10]; // } // return c // } //年月转化化为函数saiban function saiban(m) { var c = ""; if (m < 10) { c = arr[m]; } if (m == 10) { c = arr[10]; } if (m > 10 && m < 20) { if (parseInt(m / 10) == 1) { c = arr[10] + arr[m % 10]; } if (m % 10 == 0) { c = arr[parseInt(m / 10)] + arr[10]; } } if (m > 19) { if (m % 10 == 0) { c = arr[parseInt(m / 10)] + arr[10]; } else c = arr[parseInt(m / 10)] + arr[10] + arr[m % 10]; } return c; } </script>