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Components 77 16 17 1 Vue.component('story', { 2 template: "#story-template", 3 props: ['story'], 4 methods:{ 5 upvote: function(){ 6 this.story.upvotes += 1; 7 this.story.voted = true; 8 }, 9 setFavorite: function(){ 10 this.favorite = this.story; 11 }, 12 }, 13 computed:{ 14 isFavorite: function(){ 15 return this.story == this.favorite; 16 }, 17 } 18 }); 19 20 new Vue({ 21 el: '#app', 22 data: { 23 stories: [ 24 ... 25 ], 26 favorite: {} 27 } 28 }) If you try to run the above code, you will notice that it does not work as it should be. Whenever you try to favorite a story, the variable favorite inside $data remains null and we get none response. It seems that our story component is unable to update favorite object, so we are going to pass it on each story and add favorite to component’s properties.
Components 78 1 2 5 6 1 Vue.component('story', { 2 ... 3 props: ['story', 'favorite'], 4 ... 5 }); setFavorite method malfunctioning Hmmm, favorite still doesn’t get updated when setFavorite is executed. The button disappears as expected and a star icon appears but variable favorite is still null. This results in the user being able to favorite all stories. The problem with this approach is that we don’t keep things synced. By default, all props form a one-way-down binding between the child property and the parent one. When the parent property updates, it will flow down to the child, but not the other way around. This may be confusing but stick with me. In Vue, you can enforce a two-way binding with .sync binding type modifier. So, we will pass the variable favorite to each story like this :favorite.sync="favorite".
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The Majesty Of Vue.js © 2015 - 201
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CONTENTS 3. A Flavor of Directives.
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Introduction i
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About Vue.js iii “Mark my words:
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About Vue.js v React React and Vue.
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About Vue.js vii Ember Ember is a f
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About Vue.js ix Riot Riot 2.0 provi
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Welcome xi Homework The best way to
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Vue.js Fundamentals 1
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Install Vue.js 3 1 # latest stable
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Getting Started 5 10 11 12 13 14
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Getting Started 7 Two-way data bind
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Getting Started 9 2.4 Homework A ni
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A Flavor of Directives. 11 15 messa
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A Flavor of Directives. 13 Info An
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A Flavor of Directives. 15 Template
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A Flavor of Directives. 17 12 13
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A Flavor of Directives. 19 3.5 Home
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List Rendering 21 At this point, we
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List Rendering 23 4.2 v-for In orde
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List Rendering 25 4.3 Array Renderi
Page 44 and 45: List Rendering 27 This is the outpu
Page 46 and 47: List Rendering 29 Rendered array wi
Page 48 and 49: List Rendering 31 1 2 Let's hear s
Page 50 and 51: List Rendering 33 37 data: { 38 sto
Page 52 and 53: List Rendering 35 13 14 17 {{ sto
Page 54 and 55: List Rendering 37 Isn’t that awes
Page 56 and 57: List Rendering 39 36 writer: "John"
Page 58 and 59: List Rendering 41 We initialize ord
Page 60 and 61: List Rendering 43 29 }) 30 31 new V
Page 62 and 63: List Rendering 45 4.8 Homework For
Page 64 and 65: Interactivity 47 1 2 3 5 Upvote
Page 66 and 67: Interactivity 49 1 2 3 5 Upvote
Page 68 and 69: Interactivity 51 19 20 22 23 25
Page 70 and 71: Interactivity 53 Using Event Modifi
Page 72 and 73: Interactivity 55 11 {{$data | json}
Page 74 and 75: Interactivity 57 But there is a mor
Page 76 and 77: Interactivity 59 24 } 25 }, 26 });
Page 78 and 79: Interactivity 61 1 2 3 Let's hear
Page 80 and 81: 6. Components 6.1 What are Componen
Page 82 and 83: Components 65 1 2 3 4 5 6 7
Page 84 and 85: Components 67 1 Vue.component('stor
Page 86 and 87: Components 69 Info v-bind is used t
Page 88 and 89: Components 71 1 2 Lets hear some s
Page 90 and 91: Components 73 1 2 3 5 Hello Vue
Page 92 and 93: Components 75 13 el: '#app', 14 dat
Page 96 and 97: Components 79 1 2 3 Let's hear so
Page 98 and 99: Components 81 6.7 Homework This is
Page 100 and 101: 7. Class and Style Bindings 7.1 Cla
Page 102 and 103: Class and Style Bindings 85 Changed
Page 104 and 105: Class and Style Bindings 87 7.1.2 A
Page 106 and 107: Class and Style Bindings 89 Style o
Page 108 and 109: Class and Style Bindings 91 32 }, 3
Page 110 and 111: Consuming an API 93
Page 112 and 113: Preface 95 8.2.1 Download Book’s
Page 114 and 115: Preface 97 As indicated in the abov
Page 116 and 117: Working with real data 99 To do so
Page 118 and 119: Working with real data 101 Get stor
Page 120 and 121: Working with real data 103 Renderin
Page 122 and 123: Working with real data 105 1 2 3
Page 124 and 125: Working with real data 107 1 2 3
Page 126 and 127: 10. Integrating vue-resource 10.1 O
Page 128 and 129: Integrating vue-resource 111 DELETE
Page 130 and 131: Integrating vue-resource 113 1 read
Page 132 and 133: Integrating vue-resource 115 1 var
Page 134 and 135: Integrating vue-resource 117 We obs
Page 136 and 137: Integrating vue-resource 119 The fe
Page 138 and 139: Integrating vue-resource 121 1 Vue.
Page 140 and 141: Integrating vue-resource 123 31 33
Page 142 and 143: Integrating vue-resource 125 1 Vue.
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Integrating vue-resource 127 10.6 H
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