js file to base64

vuetity v-file-input

<v-file-input label="File input" @change="fileChange" v-model="file"></v-file-input>
<img :src="image" style="width:100%;height:200px;object-fit: cover;" />

js

    fileChange () {
      console.log('fileChange ')
      console.log(this.file)
      let reader = new FileReader()
      let self = this
      reader.readAsDataURL(this.file)
      reader.onload = function (e) {
        let dataBase64 = reader.result
        console.log(dataBase64)
        self.image = dataBase64
      }
    }

js base64 to file