Vue Gallery (Failure) - JSFiddle

HTML

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<body>
  <div id="app">
    <upload-gallery></upload-gallery>
  </div>
</body>
​
<!-- Hello, my name is Taharka. I am very new to Vue and therefore cannot code something as simple as a gallery. Can you help me out? -->

Vue

Module

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var uploadGallery = Vue.component('uploadGallery', {
  template: `
  <div class="add-image-row">
    <div class="container">
      <div class="row">
        <div class="col-md-12">
          <h2>Upload an image</h2>
          <h2><small>Add gallery images here</small></h2>
        </div>
      </div>
      <div class="row">
        <div class="col-md-6">
          <input type='file' accept='image/*' @change="displaySelected">
          <div v-show="imageSelected">
            <a href="javascript:void(0);" class="btn btn-success right" value="Add to gallery" @click.prevent="addToGallery">Add to gallery</a>
            <a href="javascript:void(0);" class="btn btn-danger left" value="Select another image" @click.prevent="resetSelection">Select another image</a>
          </div>
        </div>
        <div class="col-md-6" v-show="currentImg != '' ">
          <img :src="currentImg" alt="image" width="80%">
        </div>
      </div>
      <br>
      <h3>Gallery ({{imgNum}})</h3>
      <div v-show=" imgNum > 0 ">
        <h3><small>Click on an image to remove it from the gallery</small></h3>
      </div>
      <br>
      <div class="col-xs-2" v-for="(data, key, index) in imgParsed" :key="index">
        <a v-show="data != null" href='javascript:void(0);' @click.prevent="showRemove(key)">
          <img :src="data" :alt="key">
        </a>
        {{removingImage[key]}}
        <div class="row" v-show="removingImage[key]">
              <div class="col-xs-6">
                <a href="javascript:void(0);" class="btn btn-danger right" value="Remove image" @click.prevent="remove(key)">Remove this image</a>
              </div>
              <div class="col-xs-6">
            <a href="javascript:void(0);" class="btn btn-success left" value="Cancel" @click.prevent="hideRemove(key)">Cancel</a>
              </div>
            </div>
        </div>
    </div>
  </div>`,
  props: [
    'objects',
    'act',
  ],
  data() {
    return {
      // Statuses
      imageSelected: false,
      removingImage: {},
​
      // Data
      images: new FormData(),
      imgParsed: null,
      currentImg: "",
      divs: '',
    }
  },
  methods: {
    displaySelected: function() {
      this.imageSelected = true;
      let currentImg = event.target.files[0];
      this.getImgdata(currentImg);
    },
​
    getImgdata: function(img) {
      let reader = new FileReader();
      reader.readAsDataURL(img);
      reader.onload = event => {
        this.currentImg = event.target.result;
      }
    },
​
    addToGallery: function() {
      this.removingImage['image' + (this.imgNum + 1)] = false;
      this.images.append('image' + (this.imgNum + 1), this.currentImg);
      this.imgParsed = this.parseFormData(this.images.entries());
      this.resetSelection();
    },
​
    resetSelection: function() {
      this.currentImg = "";
      this.imageSelected = false;
      document.getElementById('app').getElementsByTagName('input').item(0).value = null;
    },
​
    showRemove: function(img) {
      try {
        var a = this.removingImage[img]
        this.removingImage = Object.assign({}, this.removingImage, { [img]: true })
        var b = this.removingImage[img]
        console.log('a = ' + a, 'b = ' + b)
        if (a == b && a == false) {
          console.log('removingImage not updating')
        }
      } catch (err) {
        console.log(err)
      }
    },
    hideRemove: function(img) {
      this.removingImage[img] = false;
    },
    remove: function(img) {
      try {
        this.images.delete(img);
        delete this.removingImage[img]
        delete this.imgParsed[img];
      } catch (err) {
        console.log(err)
      }
    },
    parseFormData(obj) {
      var newObj = {};
      for (var value of obj) {
        newObj[value[0]] = value[1];
      }
      return newObj;
    }
​
  },
  computed: {
    imgNum: function() {
      return this.imgParsed == null ? 0 : Object.keys(this.imgParsed).length;
    }
  },
  watch: {
    currentImg: function() {
      console.log(this.imgParsed)
    }
  }
})
​
const app = new Vue({
  el: "#app",
  components: {
    uploadGallery
  }
})
​

CSS

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​

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