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网页上显示时间脚本（摘抄）
主要 HTML 标签如下：
<html> <head> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <meta http-equiv="content-type" content="text/html;charset=utf-8"> <meta name="theme-color" content="#2932e1"> <title>时间_百度搜索</title> </head> <body link="#0000cc"> <div id="wrapper" class="wrapper_l"> <div id="wrapper_wrapper"> <div id="container" class="container_l"> <div id="content_left"> <div class="result-op c-container" srcid="11471" fk="11471_时间" id="1" tpl="beijingtime"> <div class="op-beijingtime"> <canvas class="op-beijingtime-background" width="538" height="100"></canvas> <div class="op-beijingtime-box c-clearfix"> <p class="op-beijingtime-time"> 11<span>:</span>14<span class="op-beijingtime-small c-gap-left">36</span> </p> <p class="op-beijingtime-datebox"> <span class="op-beijingtime-week">星期六</span> <span class="op-beijingtime-date">2017年6月10日</span> </p> </div> </div> </div> </div> </div> </div> </div> </body> </html>
主要脚本如下：
A.merge("beijingtime", function () {
A.setup(function () {
var baidu = A.baidu,
_this = this,
getServerTime,
drawBackground,
drawMark,
drawHands,
STAR_NUM = 200,
TIME_ZONE = 8,
now,
countTimeZone,
timeZone = _this.data.timeZone || 8,
ensureTime, bjConmunu,
dst = _this.data.dst,
countDayLight,
dayLight = _this.data.dayLight,
dayLightStatus,
secondTimer,
minuteTimer,
timeFormat,
setDateTime,
dateSetter,
contextFlag,
contextEvent,
initialize,
initForIE,
hourTime = 36e5,
supportCanvas = !!document.createElement("canvas").getContext,
$container = _this.find(".op-beijingtime"),
bgCanvas,
markCanvas,
handsCanvas;
if (
countTimeZone = function (time, timeZone) {
var curZone = time.getTimezoneOffset(), curDate, month, day, hour;
if (curDate = new Date(time.getTime() + 6e4 * curZone), curDate.setTime(curDate.getTime() + timeZone * hourTime), dst) {
if (new Date(curDate.year, dst.month - 1, dst.day, dst.hour, 0, 0) < curDate &&
new Date(curDate.year, dst.endMonth - 1, dst.endDay, dst.endHour, 0, 0)) {
curDate.setTime(curDate.getTime() + hourTime);
}
}
return curDate
}
, ensureTime = function (time, timeZone) {
var curTimezone = time.getTimezoneOffset();
return new Date(time.getTime() + 6e4 * (time.getTimezoneOffset() - timeZone))
}
, getServerTime = function (callback) {
function oncallback(jqXHR) {
var time = jqXHR && jqXHR.getResponseHeader("Date");
if (time) callback(new Date(time))
}
if ("function" == typeof callback) {
$.ajax({ url: "//www.baidu.com/nocache/fesplg/time.gif ", type: "HEAD" })
.done(function (data, textStatus, jqXHR) {
oncallback(jqXHR)
})
.fail(function (jqXHR, textStatus, errorThrown) {
oncallback(jqXHR)
})
}
}
, setDateTime = function (date, time) {
var t = time.split(":");
return date.setHours(t[0]), date.setMinutes(t[1] || 0), date.setSeconds(t[2] || 0), date
}
, countDayLight = function () {
var startTime = dayLight.start, endTime = dayLight.end;
return startTime = setDateTime(new Date(now.getTime()), startTime),
endTime = setDateTime(new Date(now.getTime()), endTime),
startTime < now && endTime > now ? "daylight" : "night"
}
, drawBackground = function (isNight) {
var ctx = bgCanvas.getContext("2d"),
width = bgCanvas.offsetWidth,
height = bgCanvas.offsetHeight,
grd,
drawStar;
if (!dayLightStatus || dayLightStatus != isNight) {
if (dayLightStatus = isNight, ctx.clearRect(0, 0, width, height), drawStar = function () {
var i, x, y, radGrd, radius, startColor, opacity, unit;
for (unit = supportCanvas ? 1 : .5, i = 0; i < STAR_NUM; i++) {
x = Math.random() * width,
y = Math.random() * height,
radius = Math.random() + unit, opacity = radius - unit,
supportCanvas && (opacity /= 2),
radGrd = ctx.createRadialGradient(x, y, 1, x, y, radius),
radGrd.addColorStop(0, "rgba( 175, 175, 175, " + opacity + " )"),
radGrd.addColorStop(1, "rgba( 175, 175, 175, 0 )"),
ctx.fillStyle = radGrd,
ctx.beginPath(),
ctx.arc(x, y, radius, 0, 2 * Math.PI, true),
ctx.fill(),
ctx.closePath()
}
}, isNight) {
grd = ctx.createLinearGradient(0, 0, 0, height),
grd.addColorStop(0, "rgb(24, 50, 89)"),
grd.addColorStop(1, "rgb(52, 130, 186)");
}
else {
grd = ctx.createLinearGradient(0, 0, 0, height),
grd.addColorStop(0, "#0067bf"),
grd.addColorStop(1, "#6eabe2");
}
if (ctx.fillStyle = grd, ctx.fillRect(0, 0, width, height), isNight)
drawStar()
}
}
, drawMark = function () {
var ctx = markCanvas.getContext("2d"), i, lineLength, radius = markCanvas.offsetWidth / 2;
for (ctx.translate(radius, radius), i = 0; i < 60; i++) {
if (ctx.lineWidth = 1, ctx.strokeStyle = "rgba( 255, 255, 255, 0.3 )", lineLength = 4, i % 5 == 0) {
lineLength = 8, ctx.strokeStyle = "#fff";
}
ctx.beginPath(),
ctx.moveTo(0, lineLength - radius),
ctx.lineTo(0, -radius),
ctx.stroke(),
ctx.closePath(),
ctx.rotate(Math.PI / 30)
}
}
, drawHands = function (date) {
var hour = date.getHours(),
minute = date.getMinutes(),
second = date.getSeconds(),
ctx = handsCanvas.getContext("2d"),
radius = handsCanvas.offsetWidth / 2,
draw;
hour > 12 && (hour -= 12),
hour += minute / 60,
minute += second / 60,
ctx.clearRect(0, 0, 2 * radius, 2 * radius),
draw = function (lineWidth, strokeStyle, rotate, start, end) {
ctx.save(),
ctx.lineWidth = lineWidth,
ctx.strokeStyle = strokeStyle,
ctx.translate(radius, radius),
ctx.rotate(rotate),
ctx.beginPath(),
ctx.moveTo(0, start),
ctx.lineTo(0, end),
ctx.stroke(),
ctx.closePath(),
ctx.restore()
}
, draw(3, "#fff", Math.PI / 6 * hour, 6, -16),
draw(2, "#fff", Math.PI / 30 * minute, 6, -24),
draw(1, "#d93c3c", Math.PI / 30 * second, 6, -24)
}
, timeFormat = function (str) { return ("0" + str).slice(-2) }
, dateSetter = {
time: null,
week: null,
date: null,
init: function () {
this.time = _this.find(".op-beijingtime-time")[0],
this.week = _this.find(".op-beijingtime-week")[0],
this.date = _this.find(".op-beijingtime-date")[0],
this.setTime(),
this.minuteSet()
}
, setTime: function () {
this.time.innerHTML = timeFormat(now.getHours()) + "<span>:</span>"
+ timeFormat(now.getMinutes())
+ ‘<span class="op-beijingtime-small c-gap-left">‘
+ timeFormat(now.getSeconds())
+ "</span>"
}
, setWeek: function () {
this.week.innerHTML = "星期" + "日一二三四五六".charAt(now.getDay())
}
, setDate: function () {
this.date.innerHTML = now.getFullYear() + "年" + (now.getMonth() + 1) + "月" + now.getDate() + "日"
}
, minuteSet: function () {
this.setWeek(), this.setDate()
}
}
, minuteTimer = function () {
getServerTime(function (time) {
now = countTimeZone(time, timeZone),
dateSetter.minuteSet(),
drawBackground("night" == countDayLight())
}
)
}
, bjConmunu = function () {
contextFlag = true
}
, contextEvent = function () {
$(document).bind("contextmenu", bjConmunu)
}
, initialize = function () {
var tpl = ‘<canvas class="op-beijingtime-background" width= "#{width} " height= "100" ></canvas > <div class="op- beijingtime - box c- clearfix" > < canvas class="op- beijingtime - hands" width="65" height="65" ></canvas > <canvas class="op- beijingtime - mark" width="65" height="65"></canvas> <p class="op- beijingtime - time"></p> <p class="op- beijingtime - datebox"> <span class="op- beijingtime - week"></span> <span class="op- beijingtime - date"></span> </p> </div>‘;
if ($container.html($.format(tpl, { width: _this.container.offsetWidth })),
bgCanvas = _this.find(".op-beijingtime-background")[0],
markCanvas = _this.find(".op-beijingtime-mark")[0],
handsCanvas = _this.find(".op-beijingtime-hands")[0],
!supportCanvas) {
A.ui.canvas.init([bgCanvas, markCanvas, handsCanvas]);
}
$(document).ready(function () {
getServerTime(function (time) {
now = time, contextEvent(),
now = countTimeZone(now, timeZone),
drawBackground("night" == countDayLight()),
drawMark(),
drawHands(now),
dateSetter.init(),
secondTimer = window.setInterval(function () {
var timeObj, timezone;
if (0 == now.getSeconds() || true == contextFlag)
minuteTimer(), contextFlag = false;
if (timezone = now.getTimezoneOffset(), now = new Date(now.getTime() + 1e3), now.getTimezoneOffset() != timezone) {
now = ensureTime(now, timezone);
}
drawHands(now), dateSetter.setTime()
}, 1e3)
})
})
}
, supportCanvas) {
initialize();
}
else {
A.use("canvas", function () { initialize() });
}
this.dispose = function () {
window.clearInterval(secondTimer), $(document).unbind("contextmenu", bjConmunu)
}
});
});
网页上显示时间脚本（摘抄）
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