我有以下代码：
连接计数器.js
var express = require("express");
var app = express();
var socket = require("socket.io");
var server = app.listen(4000);
var io = socket.listen(server);
app.get('/', function(request, response){
response.sendfile(__dirname + "/index.html");
});
var activeClients = 0;
io.sockets.on('connection', function(socket){clientConnect(socket)});
function clientConnect(socket){
activeClients +=1;
io.sockets.emit('message', {clients:activeClients});
socket.on('disconnect', function(){clientDisconnect()});
}
function clientDisconnect(){
activeClients -=1;
io.sockets.emit('message', {clients:activeClients});
}
index.html（统计连接到网站的客户端）
<!DOCTYPE html>
<html>
<head>
<title>Connection Counter</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script src="/socket.io/socket.io.js"></script>
<script>
function msgReceived(msg){
$clientCounter.html(msg.clients);
}
$(document).ready(function () {
$clientCounter = $("#client_count")
var socket = io.connect('http://localhost:4000');
socket.on('message', function(msg){msgReceived(msg)});
});
</script>
</head>
<body>
<p><span id="client_count">0</span> connected clients</p>
</body>
</html>
和 index.html（jQuery 旋钮）
<!DOCTYPE html>
<html>
<head>
<title>jQuery Knob demo</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
<script src="js/jquery.knob.js"></script>
<script>
$(function($) {
$(".knob").knob({
change : function (value) {
//console.log("change : " + value);
},
release : function (value) {
//console.log(this.$.attr('value'));
console.log("release : " + value);
},
cancel : function () {
console.log("cancel : ", this);
},
draw : function () {
// "tron" case
if(this.$.data('skin') == 'tron') {
var a = this.angle(this.cv) // Angle
, sa = this.startAngle // Previous start angle
, sat = this.startAngle // Start angle
, ea // Previous end angle
, eat = sat + a // End angle
, r = 1;
this.g.lineWidth = this.lineWidth;
this.o.cursor
&& (sat = eat - 0.3)
&& (eat = eat + 0.3);
if (this.o.displayPrevious) {
ea = this.startAngle + this.angle(this.v);
this.o.cursor
&& (sa = ea - 0.3)
&& (ea = ea + 0.3);
this.g.beginPath();
this.g.strokeStyle = this.pColor;
this.g.arc(this.xy, this.xy, this.radius - this.lineWidth, sa, ea, false);
this.g.stroke();
}
this.g.beginPath();
this.g.strokeStyle = r ? this.o.fgColor : this.fgColor ;
this.g.arc(this.xy, this.xy, this.radius - this.lineWidth, sat, eat, false);
this.g.stroke();
this.g.lineWidth = 2;
this.g.beginPath();
this.g.strokeStyle = this.o.fgColor;
this.g.arc( this.xy, this.xy, this.radius - this.lineWidth + 1 + this.lineWidth * 2 / 3, 0, 2 * Math.PI, false);
this.g.stroke();
return false;
}
}
});
// Example of infinite knob, iPod click wheel
var v, up=0,down=0,i=0
,$idir = $("div.idir")
,$ival = $("div.ival")
,incr = function() { i++; $idir.show().html("+").fadeOut(); $ival.html(i); }
,decr = function() { i--; $idir.show().html("-").fadeOut(); $ival.html(i); };
$("input.infinite").knob(
{
min : 0
, max : 20
, stopper : false
, change : function () {
if(v > this.cv){
if(up){
decr();
up=0;
}else{up=1;down=0;}
} else {
if(v < this.cv){
if(down){
incr();
down=0;
}else{down=1;up=0;}
}
}
v = this.cv;
}
});
});
</script>
<style>
body{
padding: 0;
margin: 0px 50px;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
font-weight: 300;
text-rendering: optimizelegibility;
}
p{font-size: 30px; line-height: 30px}
div.demo{text-align: center; width: 280px; float: left}
div.demo > p{font-size: 20px}
</style>
</head>
<body>
<div style="clear:both"></div>
<div id="big" class="demo" style="height:800px;width:100%">
<p>× Big !</p>
<pre>
data-width="700"
</pre>
<input class="knob" data-min="0" data-max="100" data-width="700" data-height="700" data-thickness=".7" data-cursor=true>
</div>
</body>
</html>
我试图将这两个 index.html 结合起来，但没有运气。单独工作，但是当我结合并尝试运行 nodejs 时，计数器不起作用并且旋钮不显示。
有什么建议么？
如何：http ://www.scottblaine.com/getting-started-node-js-socket-io/
jQuery 旋钮：https ://github.com/aterrien/jQuery-Knob
结合：
<!DOCTYPE html>
<html>
<head>
<title>jQuery Knob demo</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script src="js/jquery.knob.js"></script>
<script src="/socket.io/socket.io.js"></script>
<script>
function msgReceived(msg){
$clientCounter.html(msg.clients);
}
$(document).ready(function () {
$clientCounter = $("#client_count")
var socket = io.connect('http://localhost:4000');
socket.on('message', function(msg){msgReceived(msg)});
});
$(function($) {
$(".knob").knob({
change : function (value) {
//console.log("change : " + value);
},
release : function (value) {
//console.log(this.$.attr('value'));
console.log("release : " + value);
},
cancel : function () {
console.log("cancel : ", this);
},
draw : function () {
// "tron" case
if(this.$.data('skin') == 'tron') {
var a = this.angle(this.cv) // Angle
, sa = this.startAngle // Previous start angle
, sat = this.startAngle // Start angle
, ea // Previous end angle
, eat = sat + a // End angle
, r = 1;
this.g.lineWidth = this.lineWidth;
this.o.cursor
&& (sat = eat - 0.3)
&& (eat = eat + 0.3);
if (this.o.displayPrevious) {
ea = this.startAngle + this.angle(this.v);
this.o.cursor
&& (sa = ea - 0.3)
&& (ea = ea + 0.3);
this.g.beginPath();
this.g.strokeStyle = this.pColor;
this.g.arc(this.xy, this.xy, this.radius - this.lineWidth, sa, ea, false);
this.g.stroke();
}
this.g.beginPath();
this.g.strokeStyle = r ? this.o.fgColor : this.fgColor ;
this.g.arc(this.xy, this.xy, this.radius - this.lineWidth, sat, eat, false);
this.g.stroke();
this.g.lineWidth = 2;
this.g.beginPath();
this.g.strokeStyle = this.o.fgColor;
this.g.arc( this.xy, this.xy, this.radius - this.lineWidth + 1 + this.lineWidth * 2 / 3, 0, 2 * Math.PI, false);
this.g.stroke();
return false;
}
}
});
// Example of infinite knob, iPod click wheel
var v, up=0,down=0,i=0
,$idir = $("div.idir")
,$ival = $("div.ival")
,incr = function() { i++; $idir.show().html("+").fadeOut(); $ival.html(i); }
,decr = function() { i--; $idir.show().html("-").fadeOut(); $ival.html(i); };
$("input.infinite").knob(
{
min : 0
, max : 20
, stopper : false
, change : function () {
if(v > this.cv){
if(up){
decr();
up=0;
}else{up=1;down=0;}
} else {
if(v < this.cv){
if(down){
incr();
down=0;
}else{down=1;up=0;}
}
}
v = this.cv;
}
});
});
</script>
<style>
body{
padding: 0;
margin: 0px 50px;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
font-weight: 300;
text-rendering: optimizelegibility;
}
p{font-size: 30px; line-height: 30px}
div.demo{text-align: center; width: 280px; float: left}
div.demo > p{font-size: 20px}
</style>
</head>
<body>
<p><span id="client_count">0</span> connected clients</p>
<div style="clear:both"></div>
<div id="big" class="demo" style="height:800px;width:100%">
<p>× Big !</p>
<pre>
data-width="700"
</pre>
<input class="knob" data-min="0" data-max="100" data-width="700" data-height="700" data-thickness=".7" data-cursor=true>
</div>
</body>
</html>