Irene Iaccio - Magento2 e RequireJS. The right way

Javascript is a crazy language

TypeError: undefined is not a function

Magento 1

Sorting JS files is a big mess1

Dead scripts2

Wall of code3

RequireJS

NOOOOO! another JavaScript

Library

define(ID?, dependencies?, function)

AMD

Module Definition

define(['jquery', 'underscore'], function($, _) { // Do stuff});

RequireJS

Module Definition

<script data-main="scripts/main" src="scripts/require.js"></script>

// scripts/main.jsrequire(['foo', 'bar'], function(foo) { // Do stuff});

head.appendChild()

Wrapping upRequireJS

http://requirejs.org

Magento 2

Resource optimization

Resource optimization

Resource optimization

var config = { //Settings};

require-config.js

baseUrl

site / static / area / vendor / theme / locale

baseUrl

baseUrl + Vendor_Module/script + .js

Pathsvar config = { paths: { "module-name": "Vendor_Module/script" }};

Map map: { '*': { "menu": "Vendor_Module/js/menu" } }

define([ "jquery"], function ($) { 'use strict';

function awesomeMenu() { return "this is a private function"; } return function () { var message = awesomeMenu(); alert(message); }});

Shim

define([ “jquery”, “jquery-plugin” ], function($) { // do stuff });

shim: {

'jquery-plugin': {

deps: ['jquery']

}

}

Config config: { “module-name”: { key: “value” } }

define([“module”], function (module) { module.config().key});

Mixinsvar config = { 'config':{ 'mixins': { 'target/module': { 'Vendor_Module/script' : true } } }};

Do something between the checkout steps

config: { mixins: { 'Magento_Checkout/js/model/step-navigator': { 'js/checkoutCustomization': true } }}

define([ "jquery" ], function ($) { 'use strict';

return function (target) { target.next = function() { // do stuff }; return target };});

define(['jquery'], function ($) { return function (widget) {

$.widget('mage.SwatchRenderer', widget, {

updateBaseImage: function (images, context, isProductViewExist) { //do stuff }

}); return $.mage.SwatchRenderer; }});

Want more?

Plugins

define([ 'text!mage/gallery/gallery.html',], function (galleryTpl) { // Gallery});

text!

Plugins

define(['domReady!'], function (doc) { //This function is called //once the DOM is ready});

domReady!

Benefits1. Asynchronous module loading, deferred execution.

2. More clean and maintainable code.

3. Code & data sharing between different modules.

4. Global variables avoidance.

Write modular code!

“Using a modular script loader like RequireJS will improve the speed and quality of your code."

Questions?@Nuovecode github.com/nuovecode