element ui user avatar upload

The official example will appear that if you change the avatar multiple times, it will be uploaded multiple times.

When using manual upload, it will appear that if you click to change the avatar 3 times, all the avatars replaced 3 times will be uploaded when uploading.

The solution is:

    handleChange(file, fileList) {
      this.$refs.upload.clearFiles();
      this.$refs.upload.uploadFiles.push(file);
      this.imageUrl = file.url;
    },