VUE.JS Introduction

The Progressive
JavaScript Framework

Approachable
Versatile
Performant
Incrementally adoptable

VUE.JS Introduction

<script src="https://unpkg.com/vue"></script>

var app = new Vue({
  el: '#app',
  data: {
    message: 'Hello Vue!'
  }
})

<div id="app">
  {{ message }}
</div>

VUE.JS Features

Declarative rendering
Virtual DOM
Component system

Vue.component('todo-item', {
  template: '<li>This is a todo</li>'
})

<ol>
  <todo-item></todo-item>
</ol>

VUE.JS Features

MVVM pattern - Reactivity

var vm = new Vue({
  data: data
)}

VUE.JS instance

const vm = new Vue({
    props: ['default'],
    data () {
        return {
            a: 1,
            b: 2
        }
    },
    computed: {
        c () {
            return this.a + this.b;
        }
    },
    methods: {
        divide (value) {
            const final = value ? value : this.default 
            return this.c / final;
        }
    },
    components: {}
})

VUE.JS Caveats

Vue cannot detect the following changes to an array with:
- vm.items[indexOfItem] = newValue
- vm.items.length = newLength
Instead:
- Vue.set(vm.items, indexOfItem, newValue)
- vm.items.splice(newLength)

VUE.JS Caveats

Vue cannot detect property addition or deletion:

var vm = new Vue({
  data: {
    a: 1
  }
})
// `vm.a` is now reactive
vm.b = 2
// `vm.b` is NOT reactive

Instead:
- Vue.set(vm, 'b', 2)
- this.b = Object.assign({}, this.b, {
  lol: 1,
  omg: 2
  })

VUEX State Management

The state, which is single source of truth that drives our app
The view, which is just a declarative mapping of the state
The actions, which are the possible ways the state could change in reaction to user inputs from the view.

VUEX State Management

Multiple views may depend on the same piece of state.
Actions from different views may need to mutate the same piece of state.

Why We Chose It

the problem we wanted to solve:

Build an amazing UI
100% test coverage
flexible business logic
great flexibility for the designer

Considering all of the above VUEJS was our solution

Summary

vue-cli
Hello Word
Our Strategy
Stack

vue-cli & Hello Word

(sudo) npm install -g vue-cli
vue init webpack vuejs-is-awesome
cd vuejs-is-awesome
npm install
npm run dev

Our Strategy

Put all the Business Logic in the state manager
Keep components atomic and simple
Ajax layer handled by the state manager
Fully unit test all the 'js' files
Fully e2e test all '.vue or view' components
Plugins system to 'drop-in' new functionalities
Aggressive linting and code uniformity

Stack I

Backend / API served trough Django
Axios to handle AJAX calls
Server Side Rendering and Routing with Nuxt
Vuex as a state manager, divided in meaningful namespaced modules
AvaJS for Asynchronous unit test
CypressJS for integration / e2e tests

Stack II

Nuxt.js: a framework for creating Universal Vue.js Applications

We used it for

Routing
Server Side Rendering and SEO
Plugin System
CSS Minification / Optimisation
Code Structure
Integrated fully with Vuex
Middleware logic
Layouts

Stack III

Vuex: a state management pattern + library for Vue.js applications

Enabled us to:

Have one way data binding in our components
Time Traveling debugging
Debug logs contain the data structure snapshotted when the bug occurs
It's the core of the application and serves all the view component reliably

Stack IV

A pinch of probability is worth a pound of perhaps.”— James Thurber

We LOVE Testing...

...but unit test are not enough ...

... and component unit testing are to prone to break:

We moved all the logic to the store, being able to write 'stable' and reliable tests
E2E test for the main 'flows' of the app and for every fixed bug (Cypres)

Battle of Frameworks

Solve the same problem by different framework: Angular 2, React, Polymer, Vue
should have:
- sitebuild friendly
- speedy
- good docs
- easy to learn
- support
- community
- hybrid app development

THE WINNER IS

Our concerns were

One man show?
Immature?
Docs?
Hybrid app?
Native app?
Community?
Speed?
How to convince mgmt?

The Javascript Family

Family and relatives:

Dad Angular JS

Son React JS

Son Vue JS

Fat Uncle Ember Js

Unpopular Uncle PolymerJS

Grandpa jQuery

PERSONAS

Angular JS

70 y.o. overweight dad

Has his hands in a lot of projects

A bit slow, fixated on his own traditions

Likes stability, dislikes other families approaches

Popular

Can not stop thinking that Grandpa jQuery was right

PERSONAS

React

30 y.o. first rebel son

Hipster attitude but with a lot of friends

Drinks a (gluten free) pumpkin flavoured mocaccino

Refuses all the teaching coming from his Dad but in his rebellion discovered a lot of cool new approaches

PERSONAS

Vue Js

18 y.o. .late son

Learned from dad's mistakes

Ready to embrace his older brothers cool ideas

Too busy studying to make friends during childhood but of increasing popularity

Has a hard time stepping out of his popular brother's shadow

PERSONAS

The Question:

Now that grandpa jQuery is ready to retire, what will be the name written on his will ? Who will inerith his legacy?

SPEED

https://rawgit.com/krausest/js-framework-benchmark/master/webdriver-ts-results/table.html

Comparisons

	Angular	React	VueJs
Docs	2	3	5
Size	143 kb	43kb	23kb
Speed	3	3	4
Memory	3	3	4
Learning Curve	2	2	5
3rd party libs	5	4	3
Stability / support	LTS	Frozen API	Semver
Upgrade	1	5	3
Community	5	5	3
Jobs	4	5	2
Flexibility	2	3	5
Native	4 (NativeScript)	5 (ReactNative)	2 (Weex)
Hybrid	5 ( Ionic)	5 (ReactNative)	5 (Quasar)

Project comparisons

	D.H.A (A)	Malibu (R)	IMP (V)
Size	Big	Small	Big
Speed	3	2	5
# Refactor	1	5	5
# Bugs	2	3	4
State Mgmt.	N/Y (Redux)	N	Y (Vuex)
UI Speed	3	5	5
Js Version	ES6	ES6	ES6
SSR / SEO	N	Y	Y

WHEN, WHO ?

❤ Typescript: A
OOP: A
Big Projects: R || V
Small Projects: V
Rely on 3rd party: A || R
Native: R

Sitebuild: V
Performance: V
All-in-one: A
Learning Curve: V
TDD: A || R || V
Clean Code: V

"NaNNaNNaNNaNNaNNaNNaN"

About Quasar framework

A framework for building web apps,

PWAs, hybrid mobile apps (Cordova) or Electron apps

with the same codebase

based on VUE 2.0

The Ionic of VUE

PWA - Progressive Web Applications

Google's 2 cents on

how to make web apps from now on

Works offline ( service workers )
Installable to home screen ( manifest.json, icons )
Push notifications ( 3rd party )
under 3s load time, animations ...
Google Lighthouse

Cordova

Open source tool to build iOS & Android apps

that use Html & Js & Css inside (via webView)
has connection to native features via plugins
core plugins have good documentations, but...
still need xCode, java & Android SDK
platform version changing can affect plugins

2 platforms, one codebase,
maybe some plugins & functionality "if"-ed

How does it fit into the ecosystem?

Hopefully not gonna see:

// 要做:

vuejs.org team section

quasar-cli

global npm package
based on Webpack
all loaders configured, base ones inside package.json
comes with BABEL
sets up the project for you
folder structure & build tools
quite aggressive ESLint setup
well done, start taking a look, and customize it

UI & Styling in Quasar

baked in Stylus as CSS preprocessor
global variables used within Quasar components
material design UI component library
inputs, buttons, layouts, sidebars, tabs...
under the hood: .vue components
helper classes (flex, platform-specific & syntactic sugar)
two default themes: ios & mat

Quasar Ionic

31,781 ⭐️ vs 3.796 ⭐️

Ionic focuses solely on hybrid apps
Ionic tries keeping up with Angular versioning
1, 2... 4
Ionic View VS Quasar Play
Ionic ecosystem
Ionic 4 is gonna ship with standard web components
we'll able to use VUE inside

Latest improvements in Quasar

v0.13 => v0.14
tree-shaking, like _
improved components
PWA capabilities
improved documentation

Why did we go with it?

worked with Ionic & Cordova before

Angular fatigue

VUE inside

needed a motivation pill after Polymer

something new & familiar at once

Well around framework, not only for web apps

Tricks & tips & best practices I: VUE

API? Axios, vue-axios
state? vuex
getters > props
local data? vuex-persistedstate
auth, multilang, offline
layer out libraries
axios, moment
network error handling, common function lib
scope Css in templates
know your lifecycles!

data magic

DOM magic

Tricks & tips & best practices II: Quasar

separate platform-dependent code
q-pull-to-refresh
q-ajax-bar
q-inline-datetime
always look out for frameworks own solutions
.styl variables, classes, layout

Tricks & tips & best practices III: Cordova

Separate cordova plugin code
researching the right one
prepare for tedious testing of plugins
cordova-plugin-camera
cordova-plugin-file-opener2
cordova-plugin-file-transfer
phonegap-plugin-barcodescanner
cordova-plugin-downloadmanager
com.jcesarmobile.filepicker (iOS)
& com.cesidiodibenedetto.filechooser (Android)

Questions?

Thank you!

It's not me, it's VUE

VUE.JS Introduction

VUE.JS Introduction

VUE.JS Features

VUE.JS Features

VUE.JS instance

VUE.JS Caveats

VUE.JS Caveats

VUEX State Management

VUEX State Management

VUEX State Management

Why We Chose It

Summary

vue-cli

Hello Word

Our Strategy

Stack

vue-cli & Hello Word

Our Strategy

Stack I

Stack II

Stack III

Stack IV

Battle of Frameworks

Battle of Frameworks

THE WINNER IS

Our concerns were

The Javascript Family

PERSONAS

PERSONAS

PERSONAS

PERSONAS

SPEED

Comparisons

Project comparisons

WHEN, WHO ?

What's next

Thank you!