js axios progress
upload(files) {
const config = {
onUploadProgress: function(progressEvent) {
var percentCompleted = Math.round((progressEvent.loaded * 100) / progressEvent.total)
console.log(percentCompleted)
}
}
let data = new FormData()
data.append('file', files[0])
axios.put('/endpoint/url', data, config)
.then(res => console.log(res))
.catch(err => console.log(err))
}