getFullYear()
使用 getFullYear() 获取年份。
源代码:
</script> <!DOCTYPE html> <html> <body> "demo">Click the button to display the full year of todays date.</p> <button>Try it</button> <script> function myFunction() { var d = new Date(); var x = document.getElementById("demo"); x.innerHTML=d.getFullYear(); } </script> </body> </html>
测试结果:
2015
getTime()
getTime() 返回从 1970 年 1 月 1 日至今的毫秒数。
源代码:
<!DOCTYPE html> <html> <body> "demo">Click the button to display the number of milliseconds since midnight, January 1, 1970.</p> <button>Try it</button> <script> function myFunction() { var d = new Date(); var x = document.getElementById("demo"); x.innerHTML=d.getTime(); } </script> </body> </html>
测试结果:
1445669203860
setFullYear()
如何使用 setFullYear() 设置具体的日期。
源代码:
<!DOCTYPE html> <html> <body> "demo">Click the button to display a date after changing the year, month, and day.</p> <button>Try it</button> <script> function myFunction() { var d = new Date(); d.setFullYear(2020,10,3); var x = document.getElementById("demo"); x.innerHTML=d; } </script> <p>Remember that JavaScript counts months from 0 to 11. Month 10 is November.</p> </body> </html>
测试结果:
Tue Nov 03 2020 14:47:46 GMT+0800 (中国标准时间)
toUTCString()
如何使用 toUTCString() 将当日的日期（根据 UTC）转换为字符串。
源代码:
<!DOCTYPE html> <html> <body> "demo">Click the button to display the UTC date and time as a string.</p> <button>Try it</button> <script> function myFunction() { var d = new Date(); var x = document.getElementById("demo"); x.innerHTML=d.toUTCString(); } </script> </body> </html>
测试结果:
Sat, 24 Oct 2015 06:49:05 GMT
getDay()
如何使用 getDay() 和数组来显示星期，而不仅仅是数字。
源代码:
<!DOCTYPE html> <html> <body> "demo">Click the button to display todays day of the week.</p> <button>Try it</button> <script> function myFunction() { var d = new Date(); var weekday=new Array(7); weekday[0]="Sunday"; weekday[1]="Monday"; weekday[2]="Tuesday"; weekday[3]="Wednesday"; weekday[4]="Thursday"; weekday[5]="Friday"; weekday[6]="Saturday"; var x = document.getElementById("demo"); x.innerHTML=weekday[d.getDay()]; } </script> </body> </html>
测试结果:
Saturday
Display a clock
如何在网页上显示一个钟表。
源代码:
<!DOCTYPE html> <html> <head> <script> function startTime() { var today=new Date(); var h=today.getHours(); var m=today.getMinutes(); var s=today.getSeconds(); // add a zero in front of numbers<10 m=checkTime(m); s=checkTime(s); document.getElementById('txt').innerHTML=h+":"+m+":"+s; t=setTimeout(function(){startTime()},500); } function checkTime(i) { if (i<10) { i="0" + i; } return i; } </script> </head> <body onload="startTime()"> <div id="txt"></div> </body> </html>