Get value from emit in input field with Vue

Question

I know this has a simple answer but I appear to be stuck. I have an upload image input in a form. Following several tutorials, I have successfully created the upload method. My issue is once the image is uploaded to Firestore storage I use this.$emit('imgurl', downloadURL)

My problem is I do not know how to get that value so when the user submits the form the url gets added to the database.

Parts of the code:

HTML:

<div class="field avatar">
    <label for="avatar">Avatar</label>
    <input type="file" name="imgurl" accept="image/*" @change="detectFiles($event.target.files)">
    <div class="progress-bar green" :style="{ width: progressUpload + '%'}">{{ progressUpload }}%</div>
    <img class="avatar" v-bind:src="this.downloadURL">
</div>

Methods:

detectFiles (fileList) {
    Array.from(Array(fileList.length).keys()).map( x => {
        this.upload(fileList[x])
    })
},
upload (file) {
    var storage = firebase.storage();
    this.uploadTask = storage.ref('avatars/'+file.name).put(file);
}

Watch:

watch: {
        uploadTask: function() {
            this.uploadTask.on('state_changed', sp => {
                this.progressUpload = Math.floor(sp.bytesTransferred / sp.totalBytes * 100)
            }, 
            null, 
            () => {
                this.uploadTask.snapshot.ref.getDownloadURL().then(downloadURL => {
                    this.downloadURL = downloadURL
                    this.$emit('imgurl', downloadURL)

                })
            })
        }
    }

Add to the database:

db.collection('teams').add({
    team_name: this.team_name,
    team_id: this.team_id,
    bio: this.bio,
    url: this.imgurl,
}).then(() => {
   this.$router.push({ name: 'Admin' })
}).catch(err => {
   console.log(err)
})

Answer 1

I found the answer. I added a hidden input field <input type="hidden" name="imgurl" v-model="imgurl"> and replaced the emit with this.imgurl = downloadURL

Answer 2

You can pass a function as a prop to a child component, then call this function passing your downloadURL as argument.

Parent Component

---

HTML

<child passURL="getDownloadURL">

JS

data: {
    return {
        downloadURL: null
    }
},
methods: {
    getDownloadURL: function(url) {
        this.downloadURL = url
    }
}

Child Component

---

JS

props: ['passURL'],

Inside your watcher, you can call

this.passURL(downloadURL)

Instead of $emit.