Javascript 需要内部功能<；脚本>；node.js
我是否可以在脚本标记中放置require函数，例如：Javascript 需要内部功能<；脚本>；node.js,javascript,node.js,handlebars.js,mongoose-schema,Javascript,Node.js,Handlebars.js,Mongoose Schema,我是否可以在脚本标记中放置require函数，例如： <script> var User = require('../models/user'); alert('It is working'); </script> 编辑： 我编辑我的问题，因为我真正想要的是当我点击按钮，它将更新我的数据库。这是我的全部代码 在我的路线上->users.js var mongoose = require('mongoose'); var bcrypt = require(
<script>
var User = require('../models/user');
alert('It is working');
</script>
var mongoose = require('mongoose');
var bcrypt = require('bcryptjs');
//User Schema
var UserSchema = mongoose.Schema({
username:{
type: String,
index:true
},
password:{
type:String
},
email:{
type:String
},
name:{
type:String
},
field:{
type:String
},
e_money:{
type:Number //this is the integer form in mongoose
}
});
//accesible variable from the outside
var User = module.exports = mongoose.model('User', UserSchema);
//create the user
module.exports.createUser= function(newUser, callback){
bcrypt.genSalt(10, function(err,salt){
bcrypt.hash(newUser.password, salt, function(err, hash){
//store hash in your password DB
newUser.password = hash;
newUser.save(callback);
});
});
}
module.exports.getUserByUsername = function(username, callback){
var query = {username: username};
User.findOne(query, callback);
}
module.exports.getUserById = function(id, callback){
User.findById(id, callback);
}
module.exports.comparePassword = function(candidatePassword, hash, callback){
bcrypt.compare(candidatePassword, hash, function(err, isMatch){
if(err) throw err;
callback(null, isMatch);
});
}
//To run the application
var express = require('express');
var router = express.Router();
var passport = require('passport');
var LocalStrategy = require('passport-local').Strategy;
var User = require('../models/user');
//Register
router.get('/register', function(req,res){
res.render('register');
});
//Login
router.get('/login',function(req,res){
res.render('login');
});
//Register User
router.post('/register', function(req,res){
var name = req.body.name;
var email = req.body.email;
var username = req.body.username;
var password = req.body.password;
var password2 = req.body.password2;
var field = req.body.field;
//temporary for emoney
var e_money = req.body.e_money;
//show what's been written in web to console(name)
//console.log(name);
//validation - Check to see if the field is empty
req.checkBody('name', 'Name is required!').notEmpty();
req.checkBody('email', 'Email is required!').notEmpty();
req.checkBody('email', 'Email is not valid!').isEmail();
req.checkBody('username', 'Username is required!').notEmpty();
req.checkBody('password', 'Password is required!').notEmpty();
req.checkBody('password2', 'Password does not match').equals(req.body.password);
req.checkBody('field', 'Please specify if you are a Teacher or a Student!').notEmpty();
//temporary for emoney
req.checkBody('e_money','Please add some value in this field').notEmpty();
var errors = req.validationErrors();
if(errors){
res.render('register',{
errors:errors
});
}else{
//new user in the model(user.js)
var newUser = new User({
name: name,
email: email,
username: username,
password: password,
field: field,
e_money: e_money //temporary emoney
});
User.createUser(newUser,function(err, user){
if(err) throw err;
console.log(user);
});
req.flash('success_msg', 'You are registed and can now login');
res.redirect('/users/login');
}
});
passport.use(new LocalStrategy(
function(username, password, done){
User.getUserByUsername(username, function(err, user){
if(err) throw err;
if(!user){
return done(null, false, {message: 'Unknown User'});
}
User.comparePassword(password, user.password, function(err, isMatch){
if(err) throw err;
if(isMatch){
return done(null, user);
}
else{
return done(null, false, {message: "Invalid password"});
}
});
});
}));
passport.serializeUser(function(user, done){
done(null, user.id);
});
passport.deserializeUser(function(id, done){
User.getUserById(id, function(err, user){
done(err,user);
});
});
router.post('/login',
passport.authenticate('local',{sucessRedirect:'/',failureRedirect:'/users/login',failureFlash: true}),
function(req,res){
//dashboard
if (req.user.field == "student") {
req.flash('stud_val', 'student');
}else if(req.user.field == "teacher"){
req.flash('teach_val', 'teacher');
}else if (req.user.field == "admin") {
req.flash('admin_val', 'teacher');
}
res.redirect('/');
});
router.get('/logout',function(req, res){
req.logout();
req.flash('success_msg', 'You are logged out');
res.redirect('/users/login');
})
module.exports = router;
<!DOCTYPE html>
<html>
<head>
{{#if user}}
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
<title>PEKTOS | Live Stream</title>
<!-- Favicon-->
<link rel="icon" href="favicon.ico" type="image/x-icon">
<!-- Google Fonts -->
<link href="https://fonts.googleapis.com/css?family=Roboto:400,700&subset=latin,cyrillic-ext" rel="stylesheet" type="text/css">
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet" type="text/css">
<!-- Bootstrap Core Css -->
<link href="plugins/bootstrap/css/bootstrap.css" rel="stylesheet">
<!-- Waves Effect Css -->
<link href="plugins/node-waves/waves.css" rel="stylesheet" />
<!-- Animation Css -->
<link href="plugins/animate-css/animate.css" rel="stylesheet" />
<!-- Morris Chart Css-->
<link href="plugins/morrisjs/morris.css" rel="stylesheet" />
<!-- Custom Css -->
<link href="css/style.css" rel="stylesheet">
<!-- AdminBSB Themes. You can choose a theme from css/themes instead of get all themes -->
<link href="css/themes/all-themes.css" rel="stylesheet" />
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<script src="/socket.io/socket.io.js"></script>
<script type="text/javascript" src="/easyrtc/easyrtc.js"></script>
<script type="text/javascript" src="/easyrtc/labs/easyrtc_recorder.js"> </script>
{{#if stud_val}}
<script type="text/javascript" src="js/demo_multistream_stud.js"></script>
{{/if}}
{{#if teach_val}}
<script type="text/javascript" src="/easyrtc/labs/desktop_capture_iframe_version.js"></script>
<script type="text/javascript" src="js/demo_multistream.js"></script>
{{/if}}
<!-- <script type="text/javascript" src="js/demo_instant_messaging_rooms.js"></script> -->
<!-- for button -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.7.3/socket.io.js"></script>
<script type="text/javascript" src="prettify/prettify.js"></script>
<script type="text/javascript" src="js/jquery.slimscroll.js"></script>
{{else}}
<meta charset="UTF-8">
<meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
<title>Pektos | Log in</title>
<!-- Favicon-->
<link rel="icon" href="/favicon.ico" type="image/x-icon">
<!-- Google Fonts -->
<link href="https://fonts.googleapis.com/css?family=Roboto:400,700&subset=latin,cyrillic-ext" rel="stylesheet" type="text/css">
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet" type="text/css">
<!-- Bootstrap Select Css -->
<link href="plugins/bootstrap-select/css/bootstrap-select.css" rel="stylesheet" />
<!-- Bootstrap Core Css -->
<link href="/plugins/bootstrap/css/bootstrap.css" rel="stylesheet">
<!-- Waves Effect Css -->
<link href="/plugins/node-waves/waves.css" rel="stylesheet" />
<!-- Animation Css -->
<link href="/plugins/animate-css/animate.css" rel="stylesheet" />
<!-- Custom Css -->
<link href="/css/style.css" rel="stylesheet">
{{/if}}
</head>
<!--Load view-->
{{#if user}}
<body class="theme-red" style="overflow: hidden;">
{{{body}}}
{{else}}
<body class="login-page">
<div class="login-box">
<div class="logo">
<a href="javascript:void(0);">Pek<b>Tos</b></a>
<small>Right On Target</small>
</div>
<div class="card">
<div class="body">
<form id="sign_in" method="POST">
<div class="msg">
{{#if success_msg}} <!--Global variable that has been set in app.js-->
<div class="alert alert-success">{{success_msg}}
</div>
{{/if}}
{{#if error_msg}}
<div class="alert alert-danger">{{error_msg}}
</div>
{{/if}}
{{#if error}}
<div class="alert alert-danger">{{error}}
</div>
{{/if}}
{{{body}}}
</div>
</form>
</div>
</div>
</div>
{{/if}}
{{#if user}}
<script>
$('#localVideos').click(function(){
$('nav').toggle('drop',{direction: 'up'}, 500);
$('.btnMenuFloat').toggle('drop',{direction: 'left'}, 500);
$('.actionBtnFloat').toggle('drop',{direction: 'down'}, 500);
$('.btnfloat').toggle('drop',{direction: 'down'}, 500);
$('.actionPanel2').hide();
});
function muteMe(id) {
if($('.cv'+id).prop('muted')){
$('.cv'+id).prop('muted', false);
var child = document.getElementById("micid"+id);
child.innerHTML = "mic";
$('.micbut'+id).css("color", "green");
}
else{
$('.cv'+id).prop('muted', true);
var child = document.getElementById("micid"+id);
child.innerHTML = "mic_off";
$('.micbut'+id).css("color", "red");
}
}
function showMe(id) {
$('#span'+id).toggle("drop",{direction: 'right'},500);
}
$(document).ready(function(){
var socket = io();
//understand button
$(".understandbtn").click(function(){
//reset the timer every 3 second of interval
$('.actionBtnFloat').css('z-index','0');
var mongoose = require('mongoose');
var bcrypt = require('bcryptjs');
//User Schema
var UserSchema = mongoose.Schema({
username:{
type: String,
index:true
},
password:{
type:String
},
email:{
type:String
},
name:{
type:String
},
field:{
type:String
},
e_money:{
type:Number //this is the integer form in mongoose
}
});
//accesible variable from the outside
var User = module.exports = mongoose.model('User', UserSchema);
//create the user
module.exports.createUser= function(newUser, callback){
bcrypt.genSalt(10, function(err,salt){
bcrypt.hash(newUser.password, salt, function(err, hash){
//store hash in your password DB
newUser.password = hash;
newUser.save(callback);
});
});
}
module.exports.getUserByUsername = function(username, callback){
var query = {username: username};
User.findOne(query, callback);
}
module.exports.getUserById = function(id, callback){
User.findById(id, callback);
}
module.exports.comparePassword = function(candidatePassword, hash, callback){
bcrypt.compare(candidatePassword, hash, function(err, isMatch){
if(err) throw err;
callback(null, isMatch);
});
}
//To run the application
var express = require('express');
var router = express.Router();
var passport = require('passport');
var LocalStrategy = require('passport-local').Strategy;
var User = require('../models/user');
//Register
router.get('/register', function(req,res){
res.render('register');
});
//Login
router.get('/login',function(req,res){
res.render('login');
});
//Register User
router.post('/register', function(req,res){
var name = req.body.name;
var email = req.body.email;
var username = req.body.username;
var password = req.body.password;
var password2 = req.body.password2;
var field = req.body.field;
//temporary for emoney
var e_money = req.body.e_money;
//show what's been written in web to console(name)
//console.log(name);
//validation - Check to see if the field is empty
req.checkBody('name', 'Name is required!').notEmpty();
req.checkBody('email', 'Email is required!').notEmpty();
req.checkBody('email', 'Email is not valid!').isEmail();
req.checkBody('username', 'Username is required!').notEmpty();
req.checkBody('password', 'Password is required!').notEmpty();
req.checkBody('password2', 'Password does not match').equals(req.body.password);
req.checkBody('field', 'Please specify if you are a Teacher or a Student!').notEmpty();
//temporary for emoney
req.checkBody('e_money','Please add some value in this field').notEmpty();
var errors = req.validationErrors();
if(errors){
res.render('register',{
errors:errors
});
}else{
//new user in the model(user.js)
var newUser = new User({
name: name,
email: email,
username: username,
password: password,
field: field,
e_money: e_money //temporary emoney
});
User.createUser(newUser,function(err, user){
if(err) throw err;
console.log(user);
});
req.flash('success_msg', 'You are registed and can now login');
res.redirect('/users/login');
}
});
passport.use(new LocalStrategy(
function(username, password, done){
User.getUserByUsername(username, function(err, user){
if(err) throw err;
if(!user){
return done(null, false, {message: 'Unknown User'});
}
User.comparePassword(password, user.password, function(err, isMatch){
if(err) throw err;
if(isMatch){
return done(null, user);
}
else{
return done(null, false, {message: "Invalid password"});
}
});
});
}));
passport.serializeUser(function(user, done){
done(null, user.id);
});
passport.deserializeUser(function(id, done){
User.getUserById(id, function(err, user){
done(err,user);
});
});
router.post('/login',
passport.authenticate('local',{sucessRedirect:'/',failureRedirect:'/users/login',failureFlash: true}),
function(req,res){
//dashboard
if (req.user.field == "student") {
req.flash('stud_val', 'student');
}else if(req.user.field == "teacher"){
req.flash('teach_val', 'teacher');
}else if (req.user.field == "admin") {
req.flash('admin_val', 'teacher');
}
res.redirect('/');
});
router.get('/logout',function(req, res){
req.logout();
req.flash('success_msg', 'You are logged out');
res.redirect('/users/login');
})
module.exports = router;
<!DOCTYPE html>
<html>
<head>
{{#if user}}
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
<title>PEKTOS | Live Stream</title>
<!-- Favicon-->
<link rel="icon" href="favicon.ico" type="image/x-icon">
<!-- Google Fonts -->
<link href="https://fonts.googleapis.com/css?family=Roboto:400,700&subset=latin,cyrillic-ext" rel="stylesheet" type="text/css">
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet" type="text/css">
<!-- Bootstrap Core Css -->
<link href="plugins/bootstrap/css/bootstrap.css" rel="stylesheet">
<!-- Waves Effect Css -->
<link href="plugins/node-waves/waves.css" rel="stylesheet" />
<!-- Animation Css -->
<link href="plugins/animate-css/animate.css" rel="stylesheet" />
<!-- Morris Chart Css-->
<link href="plugins/morrisjs/morris.css" rel="stylesheet" />
<!-- Custom Css -->
<link href="css/style.css" rel="stylesheet">
<!-- AdminBSB Themes. You can choose a theme from css/themes instead of get all themes -->
<link href="css/themes/all-themes.css" rel="stylesheet" />
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<script src="/socket.io/socket.io.js"></script>
<script type="text/javascript" src="/easyrtc/easyrtc.js"></script>
<script type="text/javascript" src="/easyrtc/labs/easyrtc_recorder.js"> </script>
{{#if stud_val}}
<script type="text/javascript" src="js/demo_multistream_stud.js"></script>
{{/if}}
{{#if teach_val}}
<script type="text/javascript" src="/easyrtc/labs/desktop_capture_iframe_version.js"></script>
<script type="text/javascript" src="js/demo_multistream.js"></script>
{{/if}}
<!-- <script type="text/javascript" src="js/demo_instant_messaging_rooms.js"></script> -->
<!-- for button -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.7.3/socket.io.js"></script>
<script type="text/javascript" src="prettify/prettify.js"></script>
<script type="text/javascript" src="js/jquery.slimscroll.js"></script>
{{else}}
<meta charset="UTF-8">
<meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
<title>Pektos | Log in</title>
<!-- Favicon-->
<link rel="icon" href="/favicon.ico" type="image/x-icon">
<!-- Google Fonts -->
<link href="https://fonts.googleapis.com/css?family=Roboto:400,700&subset=latin,cyrillic-ext" rel="stylesheet" type="text/css">
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet" type="text/css">
<!-- Bootstrap Select Css -->
<link href="plugins/bootstrap-select/css/bootstrap-select.css" rel="stylesheet" />
<!-- Bootstrap Core Css -->
<link href="/plugins/bootstrap/css/bootstrap.css" rel="stylesheet">
<!-- Waves Effect Css -->
<link href="/plugins/node-waves/waves.css" rel="stylesheet" />
<!-- Animation Css -->
<link href="/plugins/animate-css/animate.css" rel="stylesheet" />
<!-- Custom Css -->
<link href="/css/style.css" rel="stylesheet">
{{/if}}
</head>
<!--Load view-->
{{#if user}}
<body class="theme-red" style="overflow: hidden;">
{{{body}}}
{{else}}
<body class="login-page">
<div class="login-box">
<div class="logo">
<a href="javascript:void(0);">Pek<b>Tos</b></a>
<small>Right On Target</small>
</div>
<div class="card">
<div class="body">
<form id="sign_in" method="POST">
<div class="msg">
{{#if success_msg}} <!--Global variable that has been set in app.js-->
<div class="alert alert-success">{{success_msg}}
</div>
{{/if}}
{{#if error_msg}}
<div class="alert alert-danger">{{error_msg}}
</div>
{{/if}}
{{#if error}}
<div class="alert alert-danger">{{error}}
</div>
{{/if}}
{{{body}}}
</div>
</form>
</div>
</div>
</div>
{{/if}}
{{#if user}}
<script>
$('#localVideos').click(function(){
$('nav').toggle('drop',{direction: 'up'}, 500);
$('.btnMenuFloat').toggle('drop',{direction: 'left'}, 500);
$('.actionBtnFloat').toggle('drop',{direction: 'down'}, 500);
$('.btnfloat').toggle('drop',{direction: 'down'}, 500);
$('.actionPanel2').hide();
});
function muteMe(id) {
if($('.cv'+id).prop('muted')){
$('.cv'+id).prop('muted', false);
var child = document.getElementById("micid"+id);
child.innerHTML = "mic";
$('.micbut'+id).css("color", "green");
}
else{
$('.cv'+id).prop('muted', true);
var child = document.getElementById("micid"+id);
child.innerHTML = "mic_off";
$('.micbut'+id).css("color", "red");
}
}
function showMe(id) {
$('#span'+id).toggle("drop",{direction: 'right'},500);
}
$(document).ready(function(){
var socket = io();
//understand button
$(".understandbtn").click(function(){
//reset the timer every 3 second of interval
$('.actionBtnFloat').css('z-index','0');
clearTimeout(interval);
//send the data to the server
socket.emit('chat message', getUser());
var interval = setTimeout(function(){
$('.'+getUser()).fadeIn();
},5000);
});
socket.on('chat message', function(msg){
$('.cv'+msg).fadeOut();
$('.'+msg).append('<img id="bulb" class="actImage" src="images/understand button.png" width="50" height="50">');
$('#say'+msg).html('I understand');
var intervals = setTimeout(function(){
$('#say'+msg).html('');
$('#bulb').remove();
$('.cv'+msg).fadeIn();
},5000);
});
//understand button end
clearTimeout（间隔）；
//将数据发送到服务器
emit（'chat message'，getUser（））；
var interval=setTimeout（函数（）{
$（'.+getUser（））.fadeIn（）；
},5000);
});
socket.on（'chat message'，函数（msg）{
$（'.cv'+msg）.fadeOut（）；
$（'.+msg）.append（''）；
$（'#说'+msg）.html（'我明白'）；
var interval=setTimeout（函数（）{
$（'#说'+msg）.html（''）；
$（“#灯泡”）。移除（）；
$（'.cv'+msg.fadeIn（）；
},5000);
});
//了解按钮末端
在浏览器中要求
服务器端JavaScript（NodeJS）和客户端JavaScript之间有很大的区别。客户端JavaScript还没有模块系统，您无法在JavaScript文件中导入/导出内容
这对于JavaScript来说是一个巨大的缺点，并且会产生许多问题。例如，如果多个JS文件想要彼此通信，则它们依赖于全局名称空间
当NodeJS被引入时，它的创建者意识到了这个问题，并创建了require
/模块.exports
模式。如果希望客户端JavaScript具有相同的行为，则必须使用模块绑定器，例如、、等
客户端JavaScript用于用户交互，而NodeJS几乎可以做任何你想做的事情（读取/写入服务器硬盘上的文件，访问数据库等等）；但它只能在服务器上运行
在客户端JavaScript中，您不需要mongoose
模块，因此无法访问服务器上的数据库
此外，客户端JavaScript甚至不需要访问服务器的数据库。如果可能的话，这将是一个安全隐患
如果确实需要将数据从数据库传输到浏览器，请使用
当然，WebSocket是在客户端和服务器之间传输数据的另一种可能性。由于您已经在使用它们（我猜是socket.io），下面是一个如何执行此操作的示例（我猜这就是您希望在客户端代码中触发数据库更新的地方）：
$（“.undersandbtn”）。单击（函数（）{
//每隔3秒重置一次计时器
$（'.actionBtnFloat'）.css（'z-index'，'0'）；
风险价值扣除额=100；
var newMoney={{user.e_money}}-扣除；
//向服务器发送电子货币价值已更改的消息
socket.emit（'更新电子货币'{
用户名：{{user.name}
新钱
});
清除超时（间隔）；
//将数据发送到服务器
emit（'chat message'，getUser（））；
变量间隔=设置超时（函数（）{
$（'.+getUser（））.fadeIn（）；
}, 5000);
});
socket.on（'update e-money response'，函数（数据）{
提醒（“您的钱是：“+data.newMoney”）；
});
socket.on（'update e-money error'，函数（数据）{
警报（“无法更新您的资金：+data.error”）；
});
在服务器上，您可以执行以下操作：
//也许您给socket服务器变量的名称与“socket”不同
socket.on（'update e-money'，函数（数据）{
var userName=data.userName；
var newMoney=data.newMoney；
var query={username:username}；
//这是更新数据库中条目的方式吗？
User.findOneAndUpdate（查询，{e_money:newMoney}，{upsert:true}，函数（err，doc）{
如果（错误）{
emit（'update e-money error'，{error:err}）；
}
emit（'update e-money response'，{newMoney:newMoney}）；
});
});
不，您不能在浏览器中要求
服务器端JavaScript（NodeJS）和客户端JavaScript之间有很大的区别。客户端JavaScript还没有模块系统，您无法在JavaScript文件中导入/导出内容
这对于JavaScript来说是一个巨大的缺点，并且会产生许多问题。例如，如果多个JS文件想要彼此通信，则它们依赖于全局名称空间
当NodeJS被引入时，它的创建者意识到了这个问题，并创建了require
/模块.exports
模式。如果希望客户端JavaScript具有相同的行为，则必须使用模块绑定器，例如、、等
客户端JavaScript用于用户交互，而NodeJS几乎可以做任何你想做的事情（读取/写入服务器硬盘上的文件，访问数据库等等）；但它只能在服务器上运行
在客户端JavaScript中，您不需要mongoose
模块，因此无法访问服务器上的数据库
此外，客户端JavaScript甚至不需要访问服务器的数据库。如果可能的话，这将是一个安全隐患
如果确实需要将数据从数据库传输到浏览器，请使用
当然，WebSocket是在客户端和服务器之间传输数据的另一种可能性。由于您已经在使用它们（我猜是socket.io），下面是一个如何执行此操作的示例（我猜这就是您希望在客户端代码中触发数据库更新的地方）：
$（“.undersandbtn”）。单击（函数（）{
//每隔3秒重置一次计时器
$（'.actionBtnFloat'）.css（'z-index'，'0'）；
风险价值扣除额=100；
var newMoney={{user.e_money}}-扣除；
//向服务器发送电子货币价值已更改的消息
socket.emit（'更新电子货币'{
用户名：