What's next in Vue 3? 🖖 3️⃣

What's next in Vue3 ! ! @ianaya89 What's next in
Vue3? - @ianaya89 1

! Nacho Anaya ! @ianaya89 • JavaScript Engineer @BloqInc •
Ambassador @Auth0 • Tech Speaker @MozTechSpeakers • Organizador @Vuenos_Aires What's next in Vue3? - @ianaya89 2

! What's next in Vue3? - @ianaya89 3

! Vue 3 What's next in Vue3? - @ianaya89 5

! Totalmente Re-escrito What's next in Vue3? - @ianaya89 6

! Simple y Explícito What's next in Vue3? - @ianaya89
7

! Performance What's next in Vue3? - @ianaya89 8

! Monorepo What's next in Vue3? - @ianaya89 9

! Paquetes Individuales What's next in Vue3? - @ianaya89 10

!" Facilita Contribuir What's next in Vue3? - @ianaya89 11

➕ Extensible What's next in Vue3? - @ianaya89 12

! Tree-Shakeable Global API What's next in Vue3? - @ianaya89
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! 10 KB gzipped v2.x ~20 KB What's next in
Vue3? - @ianaya89 14

! TypeScript What's next in Vue3? - @ianaya89 15

☢ Reactivity Engine What's next in Vue3? - @ianaya89 16

What's next in Vue3? - @ianaya89 17

☢ " Antes (2.x) Object.defineProperty() What's next in Vue3? -
@ianaya89 19

☢ " Antes (2.x) <template> <h1>{{ name }}</h1> </template> <script>
export default { data () { return { name: 'Nacho', foo: 'bar' } } } </script> What's next in Vue3? - @ianaya89 20

☢ " Antes (2.x) <script> export default { data ()
{ return { object: { name: 'Nacho' }, array: ['string'] } }, created () { this.$set(this.object, 'lastName', 'Anaya') this.$delete(this.object, 'lastName') this.$set(this.array, 1, 'new string') } } </script> What's next in Vue3? - @ianaya89 21

☢ " Antes (2.x) <script> export default { data ()
{ return { object: { name: 'Nacho' }, array: ['string'] } }, created () { this.$set(this.object, 'lastName', 'Anaya') this.$delete(this.object, 'lastName') this.$set(this.array, 1, 'new string') } } </script> What's next in Vue3? - @ianaya89 22

☢ " Ahora (3.x) new Proxy(target, handler) What's next in

! Proxy const handler = { get: (object, property) =>
object[property] || 'Default Value' } const p = new Proxy({}, handler) p.a = 1 p.b = undefined console.log(p.a, p.b) // 1, 'Default Value' What's next in Vue3? - @ianaya89 24

☢ " Ahora (3.x) // this.$set(this.object, 'lastName', 'Anaya') // this.$delete(this.object,
'lastName') // this.$set(this.array, 1, 'new string' this.object.lastName = 'Anaya' delete this.object.lastName this.array[1] = 'new string' What's next in Vue3? - @ianaya89 25

☢ " Ahora (3.x) ! "Reactivity Caveats" What's next in

☢ " Ahora (3.x) Map - Set - WeakMap -
WeakSet What's next in Vue3? - @ianaya89 27

! IE11 What's next in Vue3? - @ianaya89 28

! IE11 ! Build custom para IE11 (sin Proxy) What's
next in Vue3? - @ianaya89 29

❓ Class API class App extends Vue { static template
= ` <div @click="increment"> {{ count }} {{ plusOne }} </div> ` count = 0 created() { console.log(this.count) } get plusOne() { return this.count + 1 } increment() { this.count++ } } What's next in Vue3? - @ianaya89 30

⚰ Class API What's next in Vue3? - @ianaya89 31

! Reactivity API @vue/observer What's next in Vue3? - @ianaya89
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! Reactivity API import { state } from '@vue/observer' //
crea un objeto reactivo const store = state({ counter: 1 }) console.log(store.counter) What's next in Vue3? - @ianaya89 34

! Reactivity API import { value, watch } from '@vue/observer'
// crea un objeto reactivo sobre un valor primitivo const counter = value(0) // crea un watcher a una propiedad reactiva watch( counter, value => console.log('Counter changed', value) ) What's next in Vue3? - @ianaya89 35

! Reactivity API import { value, computed } from '@vue/observer'
// crea un valor/estado reactivo const counter = value(0) // crea una computed sobre una propiedad reactiva const plusOne = computed(() => counter.value + 1) What's next in Vue3? - @ianaya89 36

! Por qué? • Cambiar paradigmas para crear Plugins/Librerias •
Mejorar la integración SDK's • Mejorar la integración con librerías • Crear alternativas para Vuex What's next in Vue3? - @ianaya89 38

♻ Dynamic Lifecycle Injection What's next in Vue3? - @ianaya89
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♻ Dynamic Lifecycle Injection import { onMounted, onUpdated } from
'vue' export default { setup () { onMounted(() => console.log('Mounted')) onUpdated(() => console.log('Updated')) } } What's next in Vue3? - @ianaya89 40

♻ Dynamic Lifecycle Injection import { onMounted, onUpdated } from
'vue' export default { setup () { // updated hook que se ejecuta solo una vez const remove = onUpdated(() => { console.log('Updated') remove() }) } } What's next in Vue3? - @ianaya89 41

♻ Dynamic LifeCycle Injection import { onMounted, onUpdated } from
'vue' export default { setup () { // attachar un hook para otro componente onMounted(() => console.log('Mounted...'), otherComponent) } } What's next in Vue3? - @ianaya89 42

♻ Dynamic LifeCycle Injection <child-component @hook:update="myUpdateHook" /> What's next in

λ Function API ! What's next in Vue3? - @ianaya89
44

λ Function API <template> <div> <span>count is {{ count }}</span>
<span>plusOne is {{ plusOne }}</span> <button @click="increment">count++</button> </div> </template> What's next in Vue3? - @ianaya89 45

λ Function API <script> import { value, computed, onMounted }
from 'vue' export default { setup() { const count = value(0) const plusOne = computed(() => count.value + 1) const increment = () => { count.value += 1 } onMounted(() => { console.log('mounted') }) return { count, plusOne, increment } } } </script> What's next in Vue3? - @ianaya89 46

λ Function API <script> export default { props: { name:
String }, setup(props, context) { console.log(props.name) context.attrs context.slots context.refs context.emit context.parent context.root } } </script> What's next in Vue3? - @ianaya89 47

! Depreacados data - computed - methods - watch -
inject - mixins - extends - hooks What's next in Vue3? - @ianaya89 48

! Motivación • Inferencia de Tipos • Reducir el Bundle
• Performance • ! Logic Composition " What's next in Vue3? - @ianaya89 50

! Reactivity API + ♻ Dynamic Lifecycle Injection + λ
Function API = ! Composition Functions What's next in Vue3? - @ianaya89 51

Patrones Actuales • Mixins • HOC • Renderless Components What's
next in Vue3? - @ianaya89 52

! Composition Functions import { onMounted, onUnmounted } from 'vue'
import { state } from '@vue/observer' export default function useMouse() { const mousePos = state({ x: 0, y: 0 }) const update = e => { x.value = e.pageX y.value = e.pageY } onMounted(() => { window.addEventListener('mousemove', update) }) onUnmounted(() => { window.removeEventListener('mousemove', update) }) return mousePos } What's next in Vue3? - @ianaya89 53

! Logic Composition <template> <div>{{ x, y }}</div> </template> <script>
import useMouse from './useMouse' export default { setup() { const { x, y } = useMouse() const { z } = useOtherLogic() return { x, y, z } } } </script> What's next in Vue3? - @ianaya89 54

! SE ROMPE TODO! What's next in Vue3? - @ianaya89
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! Se rompe todo? What's next in Vue3? - @ianaya89
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! Builds • Standard Build • Compatibility Build (v2.x )

! Más! • Multiples root elements • v-model automágico (y
multiple) • Propagación de atributos • Herramienta de migración (~5min) • Sintaxis de slots What's next in Vue3? - @ianaya89 61

! Demo What's next in Vue3? - @ianaya89 62

! github.com/vuejs/rfcs What's next in Vue3? - @ianaya89 64

Nacho: "When Vue 3.0 will be ready?" Evan: "When it’s
ready" What's next in Vue3? - @ianaya89 66

! Q4 2019 (?) What's next in Vue3? - @ianaya89
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Gracias! ! @ianaya89 What's next in Vue3? - @ianaya89 68

! Preguntas? ! @ianaya89 What's next in Vue3? - @ianaya89
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What's next in Vue 3? 🖖 3️⃣

What's next in Vue 3? 🖖 3️⃣

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