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MODULARIZAÇÃO DE CÓDIGO JS @macedorafael

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RAFAEL MACEDO github.com/macedo twitter.com/macedorafael

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CODE MINER

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CODE MINER [email protected]

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http://github.com

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6 dos 10 projetos mais populares

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560k repositórios criados em 2014* *até o momento 10/10/2014

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JS deixou de ser a segunda linguagem a algum tempo

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“JS may look familiar…

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… but it really isn’t. Take your time to get to know it.” @goloroden

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application.js app/assets/javascripts/

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//= require modernizr
 //= require jquery
 //= require jquery.validate
 //= require jquery.validate.additional-methods
 //= require jquery_ujs
 //= require fancybox
 //= require_self
 //= require jquery.ui.datepicker
 //= require jquery.ui.draggable
 //= require underscore
 //= require jquery.tokeninput
 //= require application/browser_selector
 //= require application/jQuery_gtSlider
 //= require application/jQuery_gtSelect
 //= require application/bxslider
 //= require application/jquery.form
 //= require application/validations
 //= require jquery_nested_form
 //= require ckeditor/init
 //= require ckeditor/config
 //= require application/jquery.nicescroll
 //= require custome_js/user_journey
 //= require application/album_images
 //= require application/home
 //= require application/user
 //= require jquery.rating
 //= require jquery.imagedrag.min
 //= require slider/jssor.core
 //= require slider/jssor.slider
 //= require slider/jssor.utils
 //= require scroll_paginate
 //= require destination
 //= require magicselection
 //= require jquery.quicksearch
 //= require jquery.blockUI
 
 $(document).on('click','.star',function(){
 $(this).parents('form:first').submit();
 });
 
 
 $(document).ready(function() {
 
 $('#rateform :radio.star').rating({cancel: 'Cancel', cancelValue: '0'}); 
 $("a.fancybox").fancybox({
 'transitionIn' : 'none',
 'transitionOut' : 'none',
 'autoScale' : false,
 'type' : 'iframe',


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allowfullscreen : 'true',
 allowscriptaccess : 'always',
 closeBtn : false
 }).trigger('click');
 
 $("#from_date").datepicker({
 dateFormat: 'dd/mm/yy',
 changeMonth: true,
 changeYear: true
 });
 
 $("#to_date").datepicker({
 dateFormat: 'dd/mm/yy',
 changeMonth: true,
 changeYear: true
 });
 });
 
 $(document).on('click', '.bt-deletar', function(){
 $(this).parents('li').remove();
 });
 
 // Hover box editar perfil
 function hover_perfil_box() {
 if ($('.lista-lugares').size() > 0) {
 $(".lista-lugares li").on('mouseover',function (e){
 e.preventDefault();
 $(this).children(".details").stop().animate({ "top": "94px" }, "fast" );
 });
 
 $(".lista-lugares li").on('mouseleave',function (e){
 e.preventDefault();
 $(this).children(".details").stop().animate({ "top": "120px" }, "fast" );
 });
 }
 }
 
 $(document).on('click', '.unblock_user', function(){
 $(this).parents('li').addClass('none');
 });
 
 $(document).on('click','a.circle, div.msg-content-box',function(){
 $(this).parents('div.msg-content-box').removeClass('read');
 $(this).removeClass('read');
 });
 
 $(document).on('click','a.folder, a.del',function(){
 id = $(this).parents('div.msg-content-box').prop('id')
 $("div[id="+id+"]").fadeOut("slow")
 $.fancybox.close();


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allowfullscreen : 'true',
 allowscriptaccess : 'always',
 closeBtn : false
 }).trigger('click');
 
 $("#from_date").datepicker({
 dateFormat: 'dd/mm/yy',
 changeMonth: true,
 changeYear: true
 });
 
 $("#to_date").datepicker({
 dateFormat: 'dd/mm/yy',
 changeMonth: true,
 changeYear: true
 });
 });
 
 $(document).on('click', '.bt-deletar', function(){
 $(this).parents('li').remove();
 });
 
 // Hover box editar perfil
 function hover_perfil_box() {
 if ($('.lista-lugares').size() > 0) {
 $(".lista-lugares li").on('mouseover',function (e){
 e.preventDefault();
 $(this).children(".details").stop().animate({ "top": "94px" }, "fast" );
 });
 
 $(".lista-lugares li").on('mouseleave',function (e){
 e.preventDefault();
 $(this).children(".details").stop().animate({ "top": "120px" }, "fast" );
 });
 }
 }
 
 $(document).on('click', '.unblock_user', function(){
 $(this).parents('li').addClass('none');
 });
 
 $(document).on('click','a.circle, div.msg-content-box',function(){
 $(this).parents('div.msg-content-box').removeClass('read');
 $(this).removeClass('read');
 });
 
 $(document).on('click','a.folder, a.del',function(){
 id = $(this).parents('div.msg-content-box').prop('id')
 $("div[id="+id+"]").fadeOut("slow")
 $.fancybox.close();
 1500 LOC

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allowfullscreen : 'true',
 allowscriptaccess : 'always',
 closeBtn : false
 }).trigger('click');
 
 $("#from_date").datepicker({
 dateFormat: 'dd/mm/yy',
 changeMonth: true,
 changeYear: true
 });
 
 $("#to_date").datepicker({
 dateFormat: 'dd/mm/yy',
 changeMonth: true,
 changeYear: true
 });
 });
 
 $(document).on('click', '.bt-deletar', function(){
 $(this).parents('li').remove();
 });
 
 // Hover box editar perfil
 function hover_perfil_box() {
 if ($('.lista-lugares').size() > 0) {
 $(".lista-lugares li").on('mouseover',function (e){
 e.preventDefault();
 $(this).children(".details").stop().animate({ "top": "94px" }, "fast" );
 });
 
 $(".lista-lugares li").on('mouseleave',function (e){
 e.preventDefault();
 $(this).children(".details").stop().animate({ "top": "120px" }, "fast" );
 });
 }
 }
 
 $(document).on('click', '.unblock_user', function(){
 $(this).parents('li').addClass('none');
 });
 
 $(document).on('click','a.circle, div.msg-content-box',function(){
 $(this).parents('div.msg-content-box').removeClass('read');
 $(this).removeClass('read');
 });
 
 $(document).on('click','a.folder, a.del',function(){
 id = $(this).parents('div.msg-content-box').prop('id')
 $("div[id="+id+"]").fadeOut("slow")
 $.fancybox.close();
 1500 LOC

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3k

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15k 3k

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¯\_(ツ)_/¯

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Modularização

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• Redução de complexidade • Encapsulamento • Manutenabilidade ???

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http://todomvc.com http://todomvc.com

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MVC

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Model Gerencimento de dados, persistência

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View UX, renderiza templates com os dados do modelo, eventos

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Controller Gerencia eventos entre models e views

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http://bit.ly/1de5qfT

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module revealing module mediator prototype …

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module pattern

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(function() {
 // your code here
 })();

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var Module = (function() {
 // your code here
 })();

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var Module = (function() {
 
 var privateAttribute = '';
 
 var privateMethod = function() {
 /* ... */
 };
 })();

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var Module = (function() {
 
 var privateAttribute = '';
 
 var privateMethod = function() {
 /* ... */
 };
 })();

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var Module = (function() {
 
 var privateAttribute = '';
 
 var privateMethod = function() {
 /* ... */
 };
 
 return {
 publicMethod: function() {
 /* ... */
 }
 }
 })();

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var Module = (function() {
 
 var privateAttribute = '';
 
 var privateMethod = function() {
 /* ... */
 };
 
 return {
 publicMethod: function() {
 /* ... */
 }
 }
 })();

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var Module = (function() {
 
 var privateAttribute = '';
 
 var privateMethod = function() {
 /* ... */
 };
 
 return {
 publicMethod: function() {
 /* ... */
 }
 }
 })();

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var Module = (function() {
 
 var privateAttribute = '';
 
 var privateMethod = function() {
 /* ... */
 };
 
 return {
 publicMethod: function() {
 /* ... */
 }
 }
 })();

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var QuestionsList = (function() {
 var collection = [1, 2, 3, 4, 5]
 , currentIndex = 0;
 
 return {
 current: function() {
 var i = currentIndex % collection.length;
 return 'Question: ' + collection[i];
 },
 
 next: function() {
 currentIndex += 1;
 },
 
 prev: function() {
 currentIndex -= 1;
 }
 }
 })();

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var QuestionsList = (function() {
 var collection = [1, 2, 3, 4, 5]
 , currentIndex = 0;
 
 return {
 current: function() {
 var i = currentIndex % collection.length;
 return 'Question: ' + collection[i];
 },
 
 next: function() {
 currentIndex += 1;
 },
 
 prev: function() {
 currentIndex -= 1;
 }
 }
 })();

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var QuestionsList = (function() {
 var collection = [1, 2, 3, 4, 5]
 , currentIndex = 0;
 
 return {
 current: function() {
 var i = currentIndex % collection.length;
 return 'Question: ' + collection[i];
 },
 
 next: function() {
 currentIndex += 1;
 },
 
 prev: function() {
 currentIndex -= 1;
 }
 }
 })();

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revealing module pattern

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var QuestionsList = (function() {
 var collection = [1, 2, 3, 4, 5]
 , currentIndex = 0;
 
 function current() {
 var i = currentIndex % collection.length;
 return 'Question: ' + collection[i];
 }
 
 function next() {
 currentIndex += 1;
 return current();
 }
 
 function prev() {
 currentIndex -= 1;
 }
 
 return {
 current: current,
 next: next,
 prev: prev
 }
 })();

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var QuestionsList = (function() {
 var collection = [1, 2, 3, 4, 5]
 , currentIndex = 0;
 
 function current() {
 var i = currentIndex % collection.length;
 return 'Question: ' + collection[i];
 }
 
 function next() {
 currentIndex += 1;
 return current();
 }
 
 function prev() {
 currentIndex -= 1;
 }
 
 return {
 current: current,
 next: next,
 prev: prev
 }
 })();

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var QuestionsList = (function() {
 var collection = [1, 2, 3, 4, 5]
 , currentIndex = 0;
 
 function current() {
 var i = currentIndex % collection.length;
 return 'Question: ' + collection[i];
 }
 
 function next() {
 currentIndex += 1;
 return current();
 }
 
 function prev() {
 currentIndex -= 1;
 }
 
 return {
 current: current,
 next: next,
 prev: prev
 }
 })();

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var QuestionsList = (function() {
 var collection = [1, 2, 3, 4, 5]
 , currentIndex = 0;
 
 function current() {
 var i = currentIndex % collection.length;
 return 'Question: ' + collection[i];
 }
 
 function next() {
 currentIndex += 1;
 return current();
 }
 
 function prev() {
 currentIndex -= 1;
 }
 
 return {
 current: current,
 next: next,
 prev: prev
 }
 })();

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var QuestionsList = (function() {
 
 ...
 
 function _getIndex() {
 return currentIndex % collection.length;
 }
 
 function _incrementIndex() {
 currentIndex += 1;
 }
 
 function current() {
 return 'Question: ' + collection[_getIndex()];
 }
 
 function next() {
 _incrementIndex();
 return current();
 }
 
 return {
 current: current,
 next: next
 }
 })();

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var QuestionsList = (function() {
 
 ...
 
 function _getIndex() {
 return currentIndex % collection.length;
 }
 
 function _incrementIndex() {
 currentIndex += 1;
 }
 
 function current() {
 return 'Question: ' + collection[_getIndex()];
 }
 
 function next() {
 _incrementIndex();
 return current();
 }
 
 return {
 current: current,
 next: next
 }
 })();

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var QuestionsList = (function() {
 
 ...
 
 function _getIndex() {
 return currentIndex % collection.length;
 }
 
 function _incrementIndex() {
 currentIndex += 1;
 }
 
 function current() {
 return 'Question: ' + collection[_getIndex()];
 }
 
 function next() {
 _incrementIndex();
 return current();
 }
 
 return {
 current: current,
 next: next
 }
 })();

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Object { current: function, next: function } QuestionsList

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Object { current: function, next: function, random: function } ExtraQuestionsList

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var ExtraQuestionsList = (function(QuestionsList) {
 
 QuestionsList.randomQuestion() {
 /* ... */ 
 }
 
 return QuestionList;
 
 })(QuestionsList || {});

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pub/sub pattern

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var Mediator = {
 obj: $({}), publish: function(event, data) {
 return this.obj.trigger(event, data);
 }, 
 subscribe: function(event, fn) {
 return this.obj.on(event, fn);
 }, 
 unsubscribe: function(event, fn) {
 return this.obj.off(event, fn);
 }
 };

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var QuestionViewer = (function(){
 
 function onChange() {
 alert('current question changed!');
 // fetch new question
 // render ...
 }
 
 return {
 init: function() {
 Mediator.subscribe(
 'change:question', onChange
 );
 }
 }
 })();
 
 QuestionViewer.init();

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var QuestionsList = (function() {
 …
 
 function next() {
 currentIndex += 1;
 Mediator.publish( 'change:question', { index: currentIndex } );
 return current();
 }
 …
 
 })();

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AMD (Asyncronous Module Definition)

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define(
 [
 'dep1',
 'dep2'
 ],
 
 function(A, B) {
 /* ...... */
 }
 );

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define(
 [
 "js/jquery.js",
 "js/jquery.color.js",
 "js/underscore.js"
 ],
 
 function($, colorPlugin, _){
 var shuffleColor = _.first(
 _.shuffle([“#666", "#333", "#111"])
 );
 
 $( ".item" ).animate({
 "backgroundColor": shuffleColor
 });
 
 return {};
 }
 );

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define(
 [
 "js/jquery.js",
 "js/jquery.color.js",
 "js/underscore.js"
 ],
 
 function($, colorPlugin, _){
 var shuffleColor = _.first(
 _.shuffle([“#666", "#333", "#111"])
 );
 
 $( ".item" ).animate({
 "backgroundColor": shuffleColor
 });
 
 return {};
 }
 );

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define(
 [
 "js/jquery.js",
 "js/jquery.color.js",
 "js/underscore.js"
 ],
 
 function($, colorPlugin, _){
 var shuffleColor = _.first(
 _.shuffle([“#666", "#333", "#111"])
 );
 
 $( ".item" ).animate({
 "backgroundColor": shuffleColor
 });
 
 return {};
 }
 );

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Organização

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#1 Separe módulos por arquivos

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#2 Concatene e minifique os arquivos para deploy (Grunt, Gulp)

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#3 Code Style (JSHint, JSLint)

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#4 Escreva testes (Jasmine, Mocha)

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OBRIGADO ! @macedorafael speakerdeck.com/macedorafael