使用jQuery和CSS3实现一个数字时钟

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我们经常会在网站中看见一个时钟的效果。今天向大家分享一个使用jQuery和CSS3实现一个数字时钟教程。

http://www.html5cn.org/article-5279-1.html

代码：

</div>

</div>

CSS

/* 0 */

#clock .digits div.zero .d1,

#clock .digits div.zero .d3,

#clock .digits div.zero .d4,

#clock .digits div.zero .d5,

#clock .digits div.zero .d6,

#clock .digits div.zero .d7{

opacity:1;

}

jquery code

$(function(){

// Cache some selectors

var clock = $('#clock'),

alarm = clock.find('.alarm'),

ampm = clock.find('.ampm');

// Map digits to their names (this will be an array)

var digit_to_name = 'zero one two three four five six seven eight nine'.split(' ');

// This object will hold the digit elements

var digits = {};

// Positions for the hours, minutes, and seconds

var positions = [

'h1', 'h2', ':', 'm1', 'm2', ':', 's1', 's2'

];

// Generate the digits with the needed markup,

// and add them to the clock

var digit_holder = clock.find('.digits');

$.each(positions, function(){

if(this == ':'){

digit_holder.append('<div class="dots">');

}

else{

var pos = $('<div>');

for(var i=1; i<8; i++){

pos.append('<span class="d' + i + '">');

}

// Set the digits as key:value pairs in the digits object

digits[this] = pos;

// Add the digit elements to the page

digit_holder.append(pos);

}

});

// Add the weekday names

var weekday_names = 'MON TUE WED THU FRI SAT SUN'.split(' '),

weekday_holder = clock.find('.weekdays');

$.each(weekday_names, function(){

weekday_holder.append('<span>' + this + '</span>');

});

var weekdays = clock.find('.weekdays span');

// Run a timer every second and update the clock

(function update_time(){

// Use moment.js to output the current time as a string

// hh is for the hours in 12-hour format,

// mm - minutes, ss-seconds (all with leading zeroes),

// d is for day of week and A is for AM/PM

var now = moment().format("hhmmssdA");

digits.h1.attr('class', digit_to_name[now[0]]);

digits.h2.attr('class', digit_to_name[now[1]]);

digits.m1.attr('class', digit_to_name[now[2]]);

digits.m2.attr('class', digit_to_name[now[3]]);

digits.s1.attr('class', digit_to_name[now[4]]);

digits.s2.attr('class', digit_to_name[now[5]]);

// The library returns Sunday as the first day of the week.

// Stupid, I know. Lets shift all the days one position down,

// and make Sunday last

var dow = now[6];

dow--;

// Sunday!

if(dow < 0){

// Make it last

dow = 6;

}

// Mark the active day of the week

weekdays.removeClass('active').eq(dow).addClass('active');

// Set the am/pm text:

ampm.text(now[7]+now[8]);

// Schedule this function to be run again in 1 sec

setTimeout(update_time, 1000);

})();

// Switch the theme

$('a.button').click(function(){

clock.toggleClass('light dark');

});

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使用jQuery和CSS3实现一个数字时钟

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