VueFire 
Vue.js 1 & 2 binding for Firebase 2 & >=3
Installation
- If included as global
<script>: will install automatically if globalVueis present.
<head>
<!-- Vue -->
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<!-- Firebase -->
<script src="https://gstatic.com/firebasejs/4.0.0/firebase.js"></script>
<!-- VueFire -->
<script src="https://unpkg.com/vuefire/dist/vuefire.js"></script>
</head>- In module environments, e.g CommonJS:
npm install vue firebase vuefire --savevar Vue = require('vue')
var VueFire = require('vuefire')
var firebase = require('firebase')
// explicit installation required in module environments
Vue.use(VueFire)Usage
var firebaseApp = firebase.initializeApp({ ... })
var db = firebaseApp.database()
var vm = new Vue({
el: '#demo',
firebase: {
// simple syntax, bind as an array by default
anArray: db.ref('url/to/my/collection'),
// can also bind to a query
// anArray: db.ref('url/to/my/collection').limitToLast(25)
// full syntax
anObject: {
source: db.ref('url/to/my/object'),
// optionally bind as an object
asObject: true,
// optionally provide the cancelCallback
cancelCallback: function () {},
// this is called once the data has been retrieved from firebase
readyCallback: function () {}
}
}
})If you need to access properties from the Vue instance, use the function syntax:
var vm = new Vue({
el: '#demo',
firebase: function () {
return {
anArray: db.ref('url/to/my/collection/')
}
}
})$watch and call $unbind and then $bindAsArray
About the cancelCallback:
An optional callback that will be notified if your event subscription is ever canceled because your client does not have permission to read this data (or it had permission but has now lost it). This callback will be passed an
Errorobject indicating why the failure occurred.
<div id="demo">
<pre>{{ anObject }}</pre>
<ul>
<li v-for="item in anArray">{{ item.text }}</li>
</ul>
</div>The above will bind the Vue instance's anObject and anArray to the respective Firebase data sources. In addition, the instance also gets the $firebaseRefs property, which holds the refs for each binding:
// add an item to the array
vm.$firebaseRefs.anArray.push({
text: 'hello'
})Alternatively, you can also manually bind to a Firebase ref with the $bindAsObject or $bindAsArray instance methods:
vm.$bindAsObject('user', myFirebaseRef.child('user'))
vm.$bindAsArray('items', myFirebaseRef.child('items').limitToLast(25))
// You can also pass cancelCallback and readyCallback callbacks functions as
// a third and fourth arguments. Any of them can be omitted by passing null
vm.$bindAsObject('user', myFirebaseRef.child('user'), null, () => console.log('Ready fired!'))
// References are unbound when the component is destroyed but you can manually unbind a reference
// if needed
vm.$unbind('items')To save user-input to your Firebase database, simply push the data onto this.$firebaseRefs.items (instead of this.items) within a Vue method to automatically sync with Firebase.
For example, in your template you could add something simple like
<input v-model="item" placeholder="Add an item"/>
<button @click="addItem">Add item</button>And within your Vue component
export default {
data () {
return {
item: ''
}
},
firebase: {
items: db.ref('items')
},
methods: {
addItem () {
this.$firebaseRefs.items.push({
name: this.item
})
}
}
}Data Normalization
Array Bindings
Each record in the bound array will contain a .key property which specifies the key where the record is stored. So if you have data at /items/-Jtjl482BaXBCI7brMT8/, the record for that data will have a .key of "-Jtjl482BaXBCI7brMT8".
If an individual record's value in the database is a primitive (boolean, string, or number), the value will be stored in the .value property. If the individual record's value is an object, each of the object's properties will be stored as properties of the bound record. As an example, let's assume the /items/ node you bind to contains the following data:
{
"items": {
"-Jtjl482BaXBCI7brMT8": 100,
"-Jtjl6tmqjNeAnQvyD4l": {
"first": "fred",
"last": "Flintstone"
},
"-JtjlAXoQ3VAoNiJcka9": "foo"
}
}The resulting bound array stored in vm.items will be:
[
{
".key": "-Jtjl482BaXBCI7brMT8",
".value": 100
},
{
".key": "-Jtjl6tmqjNeAnQvyD4l",
"first": "Fred",
"last": "Flintstone"
},
{
".key": "-JtjlAXoQ3VAoNiJcka9",
".value": "foo"
}
]To delete or update an item you can use the .key property of a given object. But keep in mind you have to remove the .key attribute of the updated object:
// Vue instance methods
deleteItem: function (item) {
this.$firebaseRefs.items.child(item['.key']).remove()
},
updateItem: function (item) {
// create a copy of the item
item = {...item}
// remove the .key attribute
delete item['.key']
this.$firebaseRefs.items.child(item['.key']).set(item)
} You can check the full example at examples/todo-app.
Contributing
Clone the repo, then:
$ npm install # install dependencies
$ npm test # run test suite with coverage report
$ npm run dev # watch and build dist/vuefire.js
$ npm run build # build dist/vuefire.js and vuefire.min.js
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