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[英]How to debug Node.js/JavaScript code generated from CoffeeScript?
[英]How to separate inline javascript from dynamically generated content in Express/Node.js?
对于有几年Web开发经验的人来说,这是一个有点无聊的问题,但是在没有在Programmer Stack Exchange或Google上找到答案之后,我决定在这里问一下。
我正在使用Node.js的 Express Web框架,但这个问题并不特定于任何Web框架或编程语言。
这是从数据库中查询的游戏列表。 每个游戏实体都是一个表行,使用for循环生成:
table.table
tbody
for game in games
tr
td.span2
img.img-polaroid(src='/img/games/#{game.largeImage}')
// continues further
每个Rating块,以及每个Buy按钮/模态对话框都由for循环生成,其id与游戏匹配。 例如,刺客信条的购买按钮将具有id =“price-assassins- creed ” 。 #{variable} - 是如何引用Jade中的变量,从服务器传入的。
button.btn.btn-primary.btn-mini(id='price-#{game.slug}', href='#buyModal', role='button', data-toggle='modal')
和
.modal.hide.fade(id='modal-#{game.slug}', tabindex='-1', role='dialog', aria-labelledby='myModalLabel', aria-hidden='true')
.modal-header
span.lead Game Checkout
img.pull-right(src='/img/new_visa_medium.gif')
.modal-body
label
i.icon-user
| Name on Card
input.input-medium(type='text')
label
i.icon-barcode
| Card Number
input.input-medium(type='text', placeholder='•••• •••• •••• ••••', maxlength=16)
label
i.icon-time
| Expiration Date
input.input-mini(type='text', placeholder='MMYY', maxlength=4)
label
i.icon-qrcode
| Card Code
input.input-mini(type='text', placeholder='CVC', maxlength=4)
.modal-footer
button.btn(data-dismiss='modal', aria-hidden='true') Cancel
button.btn.btn-primary(id='#{game.slug}') Buy
和
script(type='text/javascript')
$('#_#{game.slug}').raty({
path: '/img',
round : { down: .25, full: .6, up: .76 },
score: #{game.rating}/#{game.votes},
readOnly: true
});
乘以游戏数量,这就是我在一个页面上有多少内联脚本。
更糟糕的是,我必须考虑以下情况:
...在这种情况下,请使用以下脚本:
script(type='text/javascript')
$('#_#{game.slug}').raty({
path: '/img',
round : { down: .25, full: .6, up: .76 },
score: #{game.rating}/#{game.votes},
readOnly: false,
click: function (score, event) {
var self = this;
$.meow({
message: 'Thanks for voting. Your rating has been recorded.',
icon: 'http://png-3.findicons.com/files/icons/1577/danish_royalty_free/32/smiley.png'
});
$.ajax({
type: 'POST',
url: '/games/rating',
data: {
slug: $(self).attr('id').slice(1),
rating: score
},
success: function () {
console.log('setting to read-only');
$(self).raty('readOnly', true);
}
});
}
});
简而言之,它已成为维护噩梦,试图在我的.jade模板文件中维护所有这些JavaScript,并且我的标记看起来令人无法接受。
这有什么解决方案? 这似乎是CRUD应用程序的常见场景。 理想情况下,我想将所有javascript移动到单独的.js文件中。 但是,如果我可以删除一些代码重复,那也会很棒。
问题是如果我将内联javascript移动到一个单独的文件,我怎么知道我评分哪个游戏? 我如何知道用户点击了哪个购买按钮?
现在没有歧义,因为对于N场比赛,我有N个购买按钮, N个模态对话框和N个评级脚本。 无论人们如何看待这种编程风格,维护代码都是一种糟糕的方式。
请与noobie分享一些见解!
先感谢您。
这是我的games.jade文件的完整代码片段:
extends layout
block content
br
ul.nav.nav-pills
if heading === 'Top 25'
li.active
a(href='/games') Top 25
else
li
a(href='/games') Top 25
if heading === 'Action'
li.active
a(href='/games/genre/action') Action
else
li
a(href='/games/genre/action') Action
if heading === 'Adventure'
li.active
a(href='/games/genre/adventure') Adventure
else
li
a(href='/games/genre/adventure') Adventure
if heading === 'Driving'
li.active
a(href='/games/genre/driving') Driving
else
li
a(href='/games/genre/driving') Driving
if heading === 'Puzzle'
li.active
a(href='/games/genre/puzzle') Puzzle
else
li
a(href='/games/genre/puzzle') Puzzle
if heading === 'Role-Playing'
li.active
a(href='/games/genre/role-playing') Role-Playing
else
li
a(href='/games/genre/role-playing') Role-Playing
if heading === 'Simulation'
li.active
a(href='/games/genre/simulation') Simulation
else
li
a(href='/games/genre/simulation') Simulation
if heading === 'Strategy'
li.active
a(href='/games/genre/strategy') Strategy
else
li
a(href='/games/genre/strategy') Strategy
if heading === 'Sports'
li.active
a(href='/games/genre/sports') Sports
else
li
a(href='/games/genre/sports') Sports
if games.length == 0
.alert.alert-warning
| Database query returned no results.
else
table.table
tbody
for game in games
.modal.hide.fade(id='modal-#{game.slug}', tabindex='-1', role='dialog', aria-labelledby='myModalLabel', aria-hidden='true')
.modal-header
span.lead Game Checkout
img.pull-right(src='/img/new_visa_medium.gif')
.modal-body
label
i.icon-user
| Name on Card
input.input-medium(type='text')
label
i.icon-barcode
| Card Number
input.input-medium(type='text', placeholder='•••• •••• •••• ••••', maxlength=16)
label
i.icon-time
| Expiration Date
input.input-mini(type='text', placeholder='MMYY', maxlength=4)
label
i.icon-qrcode
| Card Code
input.input-mini(type='text', placeholder='CVC', maxlength=4)
.modal-footer
button.btn(data-dismiss='modal', aria-hidden='true') Cancel
button.btn.btn-primary(id='#{game.slug}') Buy
tr
td.span2
img.img-polaroid(src='/img/games/#{game.largeImage}')
td
a(href='/games/#{game.slug}')
strong
= game.title
|
if user.userName
button.btn.btn-primary.btn-mini(id='price-#{game.slug}', href='#modal-#{game.slug}', role='button', data-toggle='modal')
i.icon-shopping-cart.icon-white
= game.price
if user.purchasedGames && user.purchasedGames.length > 0
for mygame in user.purchasedGames
if mygame.game.slug == game.slug
script(type='text/javascript')
$('#price-#{game.slug}').removeAttr('href');
$('#price-#{game.slug}').html('<i class="icon-shopping-cart icon-white"></i> Purchased');
div
span(id='_' + game.slug)
span(id='votes', name='votes')
| (#{game.votes} votes)
div
small.muted
div #{game.releaseDate} | #{game.publisher}
div #{game.genre}
p
=game.description
// logged-in users
if user.userName
if game.votedPeople.length > 0
for voter in game.votedPeople
if voter == user.userName || user.suspendedRating
script(type='text/javascript')
$('#_#{game.slug}').raty({
path: '/img',
round : { down: .25, full: .6, up: .76 },
score: #{game.rating}/#{game.votes},
readOnly: true
});
else
script(type='text/javascript')
$('#_#{game.slug}').raty({
path: '/img',
round : { down: .25, full: .6, up: .76 },
score: #{game.rating}/#{game.votes},
readOnly: false,
click: function (score, event) {
var self = this;
$.meow({
message: 'Thanks for voting. Your rating has been recorded.',
icon: 'http://png-3.findicons.com/files/icons/1577/danish_royalty_free/32/smiley.png'
});
$.ajax({
type: 'POST',
url: '/games/rating',
data: {
slug: $(self).attr('id').slice(1),
rating: score
},
success: function () {
console.log('setting to read-only');
$(self).raty('readOnly', true);
}
});
}
});
else
if (user.suspendedRating)
script(type='text/javascript')
$('#_#{game.slug}').raty({
path: '/img',
round : { down: .25, full: .6, up: .76 },
score: #{game.rating}/#{game.votes},
readOnly: true
});
else
script(type='text/javascript')
$('#_#{game.slug}').raty({
path: '/img/',
round : { down: .25, full: .6, up: .76 },
score: #{game.rating}/#{game.votes},
readOnly: false,
click: function (score, event) {
var self = this;
$.meow({
message: 'Thanks for voting. Your rating has been recorded.',
icon: 'http://png-3.findicons.com/files/icons/1577/danish_royalty_free/32/smiley.png'
});
$.ajax({
type: 'POST',
url: '/games/rating',
data: {
slug: $(self).attr('id').slice(1),
rating: score
},
success: function () {
console.log('setting to read-only');
$(self).raty('readOnly', true);
}
});
}
});
else
script(type='text/javascript')
$('#_#{game.slug}').raty({
path: '/img',
round : { down: .25, full: .6, up: .76 },
score: #{game.rating}/#{game.votes},
readOnly: true
});
script(type='text/javascript')
$('##{game.slug}').click(function() {
var game = this;
$.ajax({
type: 'post',
url: '/buy',
data: {
slug: $(game).attr('id')
}
}).success(function () {
$('#price-#{game.slug}').attr('disabled', 'true');
$('#modal-' + $(game).attr('id')).modal('hide');
humane.log('Your order has been submitted!');
});
});
这太久了,无法阅读。 无论如何,我想我得到了你所说的要点,并会使用这样的格式:
<div id="some_container">
<!-- The following div would be generated in each iteration of the for loop you speak of -->
<div class="item-container" data-game-name="Your game name" data-game-id="23">
<span class="button delete-button">X</span>
</div>
</div>
并且您的脚本将具有委托(以最大限度地减少绑定的数量):
$(document).ready(function () {
$("#some_container").on("click", ".delete-button", function () {
var $this = $(this);
var $container = $this.closest(".item-container");
var game_name = $container.data("game-name");
var game_id = $container.data("game-id");
// Do whatever with the above 2 variables
});
});
至于模态的东西,你可以创建一个<div>
,它有一个“模板”,可以显示什么。 然后,当你点击任何按钮时,你使用如上所述的逻辑(获取第一个父.item-container
来获取项目的详细信息,他们用这些信息填写模态中的“模板”。然后,这样, “确定”按钮不需要一百万个硬编码的东西 - 只需一个 - 从模板中获取信息并进行任何调用或提交表单。
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